mcs/class/System.Web/System.Web.UI.WebControls/GridView.cs

   1 //
   2 // System.Web.UI.WebControls.GridView.cs
   3 //
   4 // Authors:
   5 //      Lluis Sanchez Gual (lluis@novell.com)
   6 //
   7 // (C) 2005 Novell, Inc (http://www.novell.com)
   8 //
   9 // Permission is hereby granted, free of charge, to any person obtaining
  10 // a copy of this software and associated documentation files (the
  11 // "Software"), to deal in the Software without restriction, including
  12 // without limitation the rights to use, copy, modify, merge, publish,
  13 // distribute, sublicense, and/or sell copies of the Software, and to
  14 // permit persons to whom the Software is furnished to do so, subject to
  15 // the following conditions:
  16 //
  17 // The above copyright notice and this permission notice shall be
  18 // included in all copies or substantial portions of the Software.
  19 //
  20 // THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
  21 // EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
  22 // MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
  23 // NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
  24 // LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
  25 // OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
  26 // WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
  27 //
  28
  29 #if NET_2_0
  30
  31 using System;
  32 using System.Collections;
  33 using System.Collections.Specialized;
  34 using System.ComponentModel;
  35 using System.Web.UI;
  36 using System.Security.Permissions;
  37 using System.Text;
  38 using System.IO;
  39 using System.Reflection;
  40
  41 namespace System.Web.UI.WebControls
  42 {
  43         [SupportsEventValidation]
  44         [DesignerAttribute ("System.Web.UI.Design.WebControls.GridViewDesigner, " + Consts.AssemblySystem_Design, "System.ComponentModel.Design.IDesigner")]
  45         [ControlValuePropertyAttribute ("SelectedValue")]
  46         [DefaultEventAttribute ("SelectedIndexChanged")]
  47         [AspNetHostingPermissionAttribute (SecurityAction.LinkDemand, Level = AspNetHostingPermissionLevel.Minimal)]
  48         [AspNetHostingPermissionAttribute (SecurityAction.InheritanceDemand, Level = AspNetHostingPermissionLevel.Minimal)]
  49         public class GridView: CompositeDataBoundControl, ICallbackEventHandler, ICallbackContainer, IPostBackEventHandler, IPostBackContainer
  50         {
  51                 Table table;
  52                 GridViewRowCollection rows;
  53                 GridViewRow bottomPagerRow;
  54                 GridViewRow topPagerRow;
  55
  56                 IOrderedDictionary currentEditRowKeys;
  57                 IOrderedDictionary currentEditNewValues;
  58                 IOrderedDictionary currentEditOldValues;
  59
  60                 ITemplate pagerTemplate;
  61                 ITemplate emptyDataTemplate;
  62
  63                 PropertyDescriptor[] cachedKeyProperties;
  64
  65                 // View state
  66                 DataControlFieldCollection columns;
  67                 PagerSettings pagerSettings;
  68
  69                 TableItemStyle alternatingRowStyle;
  70                 TableItemStyle editRowStyle;
  71                 TableItemStyle emptyDataRowStyle;
  72                 TableItemStyle footerStyle;
  73                 TableItemStyle headerStyle;
  74                 TableItemStyle pagerStyle;
  75                 TableItemStyle rowStyle;
  76                 TableItemStyle selectedRowStyle;
  77                 ArrayList _dataKeyArrayList;
  78                 DataKeyArray keys;
  79                 DataKey oldEditValues;
  80                 AutoGeneratedFieldProperties[] autoFieldProperties;
  81                 string [] dataKeyNames = null;
  82                 readonly string[] emptyKeys = new string[0];
  83
  84                 private static readonly object PageIndexChangedEvent = new object();
  85                 private static readonly object PageIndexChangingEvent = new object();
  86                 private static readonly object RowCancelingEditEvent = new object();
  87                 private static readonly object RowCommandEvent = new object();
  88                 private static readonly object RowCreatedEvent = new object();
  89                 private static readonly object RowDataBoundEvent = new object();
  90                 private static readonly object RowDeletedEvent = new object();
  91                 private static readonly object RowDeletingEvent = new object();
  92                 private static readonly object RowEditingEvent = new object();
  93                 private static readonly object RowUpdatedEvent = new object();
  94                 private static readonly object RowUpdatingEvent = new object();
  95                 private static readonly object SelectedIndexChangedEvent = new object();
  96                 private static readonly object SelectedIndexChangingEvent = new object();
  97                 private static readonly object SortedEvent = new object();
  98                 private static readonly object SortingEvent = new object();
  99
 100                 // Control state
 101                 int pageIndex;
 102                 int selectedIndex = -1;
 103                 int editIndex = -1;
 104                 SortDirection sortDirection = SortDirection.Ascending;
 105                 string sortExpression;
 106
 107                 public GridView ()
 108                 {
 109                 }
 110
 111                 public event EventHandler PageIndexChanged {
 112                         add { Events.AddHandler (PageIndexChangedEvent, value); }
 113                         remove { Events.RemoveHandler (PageIndexChangedEvent, value); }
 114                 }
 115
 116                 public event GridViewPageEventHandler PageIndexChanging {
 117                         add { Events.AddHandler (PageIndexChangingEvent, value); }
 118                         remove { Events.RemoveHandler (PageIndexChangingEvent, value); }
 119                 }
 120
 121                 public event GridViewCancelEditEventHandler RowCancelingEdit {
 122                         add { Events.AddHandler (RowCancelingEditEvent, value); }
 123                         remove { Events.RemoveHandler (RowCancelingEditEvent, value); }
 124                 }
 125
 126                 public event GridViewCommandEventHandler RowCommand {
 127                         add { Events.AddHandler (RowCommandEvent, value); }
 128                         remove { Events.RemoveHandler (RowCommandEvent, value); }
 129                 }
 130
 131                 public event GridViewRowEventHandler RowCreated {
 132                         add { Events.AddHandler (RowCreatedEvent, value); }
 133                         remove { Events.RemoveHandler (RowCreatedEvent, value); }
 134                 }
 135
 136                 public event GridViewRowEventHandler RowDataBound {
 137                         add { Events.AddHandler (RowDataBoundEvent, value); }
 138                         remove { Events.RemoveHandler (RowDataBoundEvent, value); }
 139                 }
 140
 141                 public event GridViewDeletedEventHandler RowDeleted {
 142                         add { Events.AddHandler (RowDeletedEvent, value); }
 143                         remove { Events.RemoveHandler (RowDeletedEvent, value); }
 144                 }
 145
 146                 public event GridViewDeleteEventHandler RowDeleting {
 147                         add { Events.AddHandler (RowDeletingEvent, value); }
 148                         remove { Events.RemoveHandler (RowDeletingEvent, value); }
 149                 }
 150
 151                 public event GridViewEditEventHandler RowEditing {
 152                         add { Events.AddHandler (RowEditingEvent, value); }
 153                         remove { Events.RemoveHandler (RowEditingEvent, value); }
 154                 }
 155
 156                 public event GridViewUpdatedEventHandler RowUpdated {
 157                         add { Events.AddHandler (RowUpdatedEvent, value); }
 158                         remove { Events.RemoveHandler (RowUpdatedEvent, value); }
 159                 }
 160
 161                 public event GridViewUpdateEventHandler RowUpdating {
 162                         add { Events.AddHandler (RowUpdatingEvent, value); }
 163                         remove { Events.RemoveHandler (RowUpdatingEvent, value); }
 164                 }
 165
 166                 public event EventHandler SelectedIndexChanged {
 167                         add { Events.AddHandler (SelectedIndexChangedEvent, value); }
 168                         remove { Events.RemoveHandler (SelectedIndexChangedEvent, value); }
 169                 }
 170
 171                 public event GridViewSelectEventHandler SelectedIndexChanging {
 172                         add { Events.AddHandler (SelectedIndexChangingEvent, value); }
 173                         remove { Events.RemoveHandler (SelectedIndexChangingEvent, value); }
 174                 }
 175
 176                 public event EventHandler Sorted {
 177                         add { Events.AddHandler (SortedEvent, value); }
 178                         remove { Events.RemoveHandler (SortedEvent, value); }
 179                 }
 180
 181                 public event GridViewSortEventHandler Sorting {
 182                         add { Events.AddHandler (SortingEvent, value); }
 183                         remove { Events.RemoveHandler (SortingEvent, value); }
 184                 }
 185
 186                 protected virtual void OnPageIndexChanged (EventArgs e)
 187                 {
 188                         if (Events != null) {
 189                                 EventHandler eh = (EventHandler) Events [PageIndexChangedEvent];
 190                                 if (eh != null) eh (this, e);
 191                         }
 192                 }
 193
 194                 protected virtual void OnPageIndexChanging (GridViewPageEventArgs e)
 195                 {
 196                         if (Events != null) {
 197                                 GridViewPageEventHandler eh = (GridViewPageEventHandler) Events [PageIndexChangingEvent];
 198                                 if (eh != null) {
 199                                         eh (this, e);
 200                                         return;
 201                                 }
 202                         }
 203                         if (!IsBoundUsingDataSourceID)
 204                                 throw new HttpException (String.Format ("The GridView '{0}' fired event PageIndexChanging which wasn't handled.", ID));
 205                 }
 206
 207                 protected virtual void OnRowCancelingEdit (GridViewCancelEditEventArgs e)
 208                 {
 209                         if (Events != null) {
 210                                 GridViewCancelEditEventHandler eh = (GridViewCancelEditEventHandler) Events [RowCancelingEditEvent];
 211                                 if (eh != null) {
 212                                         eh (this, e);
 213                                         return;
 214                                 }
 215                         }
 216                         if (!IsBoundUsingDataSourceID)
 217                                 throw new HttpException (String.Format ("The GridView '{0}' fired event RowCancelingEdit which wasn't handled.", ID));
 218                 }
 219
 220                 protected virtual void OnRowCommand (GridViewCommandEventArgs e)
 221                 {
 222                         if (Events != null) {
 223                                 GridViewCommandEventHandler eh = (GridViewCommandEventHandler) Events [RowCommandEvent];
 224                                 if (eh != null) eh (this, e);
 225                         }
 226                 }
 227
 228                 protected virtual void OnRowCreated (GridViewRowEventArgs e)
 229                 {
 230                         if (Events != null) {
 231                                 GridViewRowEventHandler eh = (GridViewRowEventHandler) Events [RowCreatedEvent];
 232                                 if (eh != null) eh (this, e);
 233                         }
 234                 }
 235
 236                 protected virtual void OnRowDataBound (GridViewRowEventArgs e)
 237                 {
 238                         if (Events != null) {
 239                                 GridViewRowEventHandler eh = (GridViewRowEventHandler) Events [RowDataBoundEvent];
 240                                 if (eh != null) eh (this, e);
 241                         }
 242                 }
 243
 244                 protected virtual void OnRowDeleted (GridViewDeletedEventArgs e)
 245                 {
 246                         if (Events != null) {
 247                                 GridViewDeletedEventHandler eh = (GridViewDeletedEventHandler) Events [RowDeletedEvent];
 248                                 if (eh != null) eh (this, e);
 249                         }
 250                 }
 251
 252                 protected virtual void OnRowDeleting (GridViewDeleteEventArgs e)
 253                 {
 254                         if (Events != null) {
 255                                 GridViewDeleteEventHandler eh = (GridViewDeleteEventHandler) Events [RowDeletingEvent];
 256                                 if (eh != null) {
 257                                         eh (this, e);
 258                                         return;
 259                                 }
 260                         }
 261                         if (!IsBoundUsingDataSourceID)
 262                                 throw new HttpException (String.Format ("The GridView '{0}' fired event RowDeleting which wasn't handled.", ID));
 263                 }
 264
 265                 protected virtual void OnRowEditing (GridViewEditEventArgs e)
 266                 {
 267                         if (Events != null) {
 268                                 GridViewEditEventHandler eh = (GridViewEditEventHandler) Events [RowEditingEvent];
 269                                 if (eh != null) {
 270                                         eh (this, e);
 271                                         return;
 272                                 }
 273                         }
 274                         if (!IsBoundUsingDataSourceID)
 275                                 throw new HttpException (String.Format ("The GridView '{0}' fired event RowEditing which wasn't handled.", ID));
 276                 }
 277
 278                 protected virtual void OnRowUpdated (GridViewUpdatedEventArgs e)
 279                 {
 280                         if (Events != null) {
 281                                 GridViewUpdatedEventHandler eh = (GridViewUpdatedEventHandler) Events [RowUpdatedEvent];
 282                                 if (eh != null) eh (this, e);
 283                         }
 284                 }
 285
 286                 protected virtual void OnRowUpdating (GridViewUpdateEventArgs e)
 287                 {
 288                         if (Events != null) {
 289                                 GridViewUpdateEventHandler eh = (GridViewUpdateEventHandler) Events [RowUpdatingEvent];
 290                                 if (eh != null) {
 291                                         eh (this, e);
 292                                         return;
 293                                 }
 294                         }
 295                         if (!IsBoundUsingDataSourceID)
 296                                 throw new HttpException (String.Format ("The GridView '{0}' fired event RowUpdating which wasn't handled.", ID));
 297                 }
 298
 299                 protected virtual void OnSelectedIndexChanged (EventArgs e)
 300                 {
 301                         if (Events != null) {
 302                                 EventHandler eh = (EventHandler) Events [SelectedIndexChangedEvent];
 303                                 if (eh != null) eh (this, e);
 304                         }
 305                 }
 306
 307                 protected virtual void OnSelectedIndexChanging (GridViewSelectEventArgs e)
 308                 {
 309                         if (Events != null) {
 310                                 GridViewSelectEventHandler eh = (GridViewSelectEventHandler) Events [SelectedIndexChangingEvent];
 311                                 if (eh != null) eh (this, e);
 312                         }
 313                 }
 314
 315                 protected virtual void OnSorted (EventArgs e)
 316                 {
 317                         if (Events != null) {
 318                                 EventHandler eh = (EventHandler) Events [SortedEvent];
 319                                 if (eh != null) eh (this, e);
 320                         }
 321                 }
 322
 323                 protected virtual void OnSorting (GridViewSortEventArgs e)
 324                 {
 325                         if (Events != null) {
 326                                 GridViewSortEventHandler eh = (GridViewSortEventHandler) Events [SortingEvent];
 327                                 if (eh != null) {
 328                                         eh (this, e);
 329                                         return;
 330                                 }
 331                         }
 332                         if (!IsBoundUsingDataSourceID)
 333                                 throw new HttpException (String.Format ("The GridView '{0}' fired event Sorting which wasn't handled.", ID));
 334                 }
 335
 336
 337                 [WebCategoryAttribute ("Paging")]
 338                 [DefaultValueAttribute (false)]
 339                 public virtual bool AllowPaging {
 340                         get {
 341                                 object ob = ViewState ["AllowPaging"];
 342                                 if (ob != null) return (bool) ob;
 343                                 return false;
 344                         }
 345                         set {
 346                                 ViewState ["AllowPaging"] = value;
 347                                 RequireBinding ();
 348                         }
 349                 }
 350
 351                 [WebCategoryAttribute ("Behavior")]
 352                 [DefaultValueAttribute (false)]
 353                 public virtual bool AllowSorting {
 354                         get {
 355                                 object ob = ViewState ["AllowSorting"];
 356                                 if (ob != null) return (bool) ob;
 357                                 return false;
 358                         }
 359                         set {
 360                                 ViewState ["AllowSorting"] = value;
 361                                 RequireBinding ();
 362                         }
 363                 }
 364
 365                 [WebCategoryAttribute ("Styles")]
 366                 [PersistenceMode (PersistenceMode.InnerProperty)]
 367                 [NotifyParentProperty (true)]
 368                 [DesignerSerializationVisibility (DesignerSerializationVisibility.Content)]
 369                 public TableItemStyle AlternatingRowStyle {
 370                         get {
 371                                 if (alternatingRowStyle == null) {
 372                                         alternatingRowStyle = new TableItemStyle ();
 373                                         if (IsTrackingViewState)
 374                                                 alternatingRowStyle.TrackViewState();
 375                                 }
 376                                 return alternatingRowStyle;
 377                         }
 378                 }
 379
 380                 [WebCategoryAttribute ("Behavior")]
 381                 [DefaultValueAttribute (false)]
 382                 public virtual bool AutoGenerateEditButton {
 383                         get {
 384                                 object ob = ViewState ["AutoGenerateEditButton"];
 385                                 if (ob != null) return (bool) ob;
 386                                 return false;
 387                         }
 388                         set {
 389                                 ViewState ["AutoGenerateEditButton"] = value;
 390                                 RequireBinding ();
 391                         }
 392                 }
 393
 394                 [WebCategoryAttribute ("Behavior")]
 395                 [DefaultValueAttribute (false)]
 396                 public virtual bool AutoGenerateDeleteButton {
 397                         get {
 398                                 object ob = ViewState ["AutoGenerateDeleteButton"];
 399                                 if (ob != null) return (bool) ob;
 400                                 return false;
 401                         }
 402                         set {
 403                                 ViewState ["AutoGenerateDeleteButton"] = value;
 404                                 RequireBinding ();
 405                         }
 406                 }
 407
 408                 [WebCategoryAttribute ("Behavior")]
 409                 [DefaultValueAttribute (false)]
 410                 public virtual bool AutoGenerateSelectButton {
 411                         get {
 412                                 object ob = ViewState ["AutoGenerateSelectButton"];
 413                                 if (ob != null) return (bool) ob;
 414                                 return false;
 415                         }
 416                         set {
 417                                 ViewState ["AutoGenerateSelectButton"] = value;
 418                                 RequireBinding ();
 419                         }
 420                 }
 421
 422                 [WebCategoryAttribute ("Behavior")]
 423                 [DefaultValueAttribute (true)]
 424                 public virtual bool AutoGenerateColumns {
 425                         get {
 426                                 object ob = ViewState ["AutoGenerateColumns"];
 427                                 if (ob != null) return (bool) ob;
 428                                 return true;
 429                         }
 430                         set {
 431                                 ViewState ["AutoGenerateColumns"] = value;
 432                                 RequireBinding ();
 433                         }
 434                 }
 435
 436                 [UrlPropertyAttribute]
 437                 [WebCategoryAttribute ("Appearance")]
 438                 [DefaultValueAttribute ("")]
 439                 [EditorAttribute ("System.Web.UI.Design.ImageUrlEditor, " + Consts.AssemblySystem_Design, "System.Drawing.Design.UITypeEditor, " + Consts.AssemblySystem_Drawing)]
 440                 public virtual string BackImageUrl {
 441                         get {
 442                                 if (ControlStyleCreated)
 443                                         return ((TableStyle) ControlStyle).BackImageUrl;
 444                                 return String.Empty;
 445                         }
 446                         set {
 447                                 ((TableStyle) ControlStyle).BackImageUrl = value;
 448                         }
 449                 }
 450
 451                 [DesignerSerializationVisibilityAttribute (DesignerSerializationVisibility.Hidden)]
 452                 [BrowsableAttribute (false)]
 453                 public virtual GridViewRow BottomPagerRow {
 454                         get {
 455                                 EnsureDataBound ();
 456                                 return bottomPagerRow;
 457                         }
 458                 }
 459
 460                 [WebCategoryAttribute ("Accessibility")]
 461                 [DefaultValueAttribute ("")]
 462                 [LocalizableAttribute (true)]
 463                 public virtual string Caption {
 464                         get {
 465                                 object ob = ViewState ["Caption"];
 466                                 if (ob != null) return (string) ob;
 467                                 return string.Empty;
 468                         }
 469                         set {
 470                                 ViewState ["Caption"] = value;
 471                                 RequireBinding ();
 472                         }
 473                 }
 474
 475                 [WebCategoryAttribute ("Accessibility")]
 476                 [DefaultValueAttribute (TableCaptionAlign.NotSet)]
 477                 public virtual TableCaptionAlign CaptionAlign
 478                 {
 479                         get {
 480                                 object o = ViewState ["CaptionAlign"];
 481                                 if(o != null) return (TableCaptionAlign) o;
 482                                 return TableCaptionAlign.NotSet;
 483                         }
 484                         set {
 485                                 ViewState ["CaptionAlign"] = value;
 486                                 RequireBinding ();
 487                         }
 488                 }
 489
 490                 [WebCategoryAttribute ("Layout")]
 491                 [DefaultValueAttribute (-1)]
 492                 public virtual int CellPadding
 493                 {
 494                         get {
 495                                 if (ControlStyleCreated)
 496                                         return ((TableStyle) ControlStyle).CellPadding;
 497                                 return -1;
 498                         }
 499                         set {
 500                                 ((TableStyle) ControlStyle).CellPadding = value;
 501                         }
 502                 }
 503
 504                 [WebCategoryAttribute ("Layout")]
 505                 [DefaultValueAttribute (0)]
 506                 public virtual int CellSpacing
 507                 {
 508                         get {
 509                                 if (ControlStyleCreated)
 510                                         return ((TableStyle) ControlStyle).CellSpacing;
 511                                 return 0;
 512                         }
 513                         set {
 514                                 ((TableStyle) ControlStyle).CellSpacing = value;
 515                         }
 516                 }
 517
 518                 [EditorAttribute ("System.Web.UI.Design.WebControls.DataControlFieldTypeEditor, " + Consts.AssemblySystem_Design, "System.Drawing.Design.UITypeEditor, " + Consts.AssemblySystem_Drawing)]
 519                 [MergablePropertyAttribute (false)]
 520                 [PersistenceModeAttribute (PersistenceMode.InnerProperty)]
 521                 [DefaultValueAttribute (null)]
 522                 [WebCategoryAttribute ("Misc")]
 523                 public virtual DataControlFieldCollection Columns {
 524                         get {
 525                                 if (columns == null) {
 526                                         columns = new DataControlFieldCollection ();
 527                                         columns.FieldsChanged += new EventHandler (OnFieldsChanged);
 528                                         if (IsTrackingViewState)
 529                                                 ((IStateManager)columns).TrackViewState ();
 530                                 }
 531                                 return columns;
 532                         }
 533                 }
 534
 535                 [DefaultValueAttribute (null)]
 536                 [WebCategoryAttribute ("Data")]
 537                 [TypeConverter (typeof(StringArrayConverter))]
 538                 [EditorAttribute ("System.Web.UI.Design.WebControls.DataFieldEditor, " + Consts.AssemblySystem_Design, "System.Drawing.Design.UITypeEditor, " + Consts.AssemblySystem_Drawing)]
 539                 public virtual string[] DataKeyNames
 540                 {
 541                         get {
 542                                 if (dataKeyNames != null)
 543                                         return dataKeyNames;
 544                                 return emptyKeys;
 545                         }
 546                         set {
 547                                 dataKeyNames = value;
 548                                 RequireBinding ();
 549                         }
 550                 }
 551
 552                 ArrayList DataKeyArrayList {
 553                         get {
 554                                 if (_dataKeyArrayList == null) {
 555                                         _dataKeyArrayList = new ArrayList ();
 556                                 }
 557                                 return _dataKeyArrayList;
 558                         }
 559                 }
 560
 561                 [BrowsableAttribute (false)]
 562                 [DesignerSerializationVisibilityAttribute (DesignerSerializationVisibility.Hidden)]
 563                 public virtual DataKeyArray DataKeys {
 564                         get {
 565                                 if (keys == null) {
 566                                         keys = new DataKeyArray (DataKeyArrayList);
 567                                         if (IsTrackingViewState)
 568                                                 ((IStateManager) keys).TrackViewState ();
 569                                 }
 570                                 return keys;
 571                         }
 572                 }
 573
 574                 DataKey OldEditValues {
 575                         get {
 576                                 if (oldEditValues == null) {
 577                                         oldEditValues = new DataKey (new OrderedDictionary ());
 578                                 }
 579                                 return oldEditValues;
 580                         }
 581                 }
 582
 583                 [WebCategoryAttribute ("Misc")]
 584                 [DefaultValueAttribute (-1)]
 585                 public virtual int EditIndex {
 586                         get {
 587                                 return editIndex;
 588                         }
 589                         set {
 590                                 if (value == editIndex)
 591                                         return;
 592                                 editIndex = value;
 593                                 RequireBinding ();
 594                         }
 595                 }
 596
 597                 [WebCategoryAttribute ("Styles")]
 598                 [PersistenceMode (PersistenceMode.InnerProperty)]
 599                 [NotifyParentProperty (true)]
 600                 [DesignerSerializationVisibility (DesignerSerializationVisibility.Content)]
 601                 public TableItemStyle EditRowStyle {
 602                         get {
 603                                 if (editRowStyle == null) {
 604                                         editRowStyle = new TableItemStyle ();
 605                                         if (IsTrackingViewState)
 606                                                 editRowStyle.TrackViewState();
 607                                 }
 608                                 return editRowStyle;
 609                         }
 610                 }
 611
 612                 [WebCategoryAttribute ("Styles")]
 613                 [PersistenceMode (PersistenceMode.InnerProperty)]
 614                 [NotifyParentProperty (true)]
 615                 [DesignerSerializationVisibility (DesignerSerializationVisibility.Content)]
 616                 public TableItemStyle EmptyDataRowStyle {
 617                         get {
 618                                 if (emptyDataRowStyle == null) {
 619                                         emptyDataRowStyle = new TableItemStyle ();
 620                                         if (IsTrackingViewState)
 621                                                 emptyDataRowStyle.TrackViewState();
 622                                 }
 623                                 return emptyDataRowStyle;
 624                         }
 625                 }
 626
 627                 [DefaultValue (null)]
 628                 [TemplateContainer (typeof(GridViewRow), BindingDirection.OneWay)]
 629                 [PersistenceMode (PersistenceMode.InnerProperty)]
 630                 [Browsable (false)]
 631                 public virtual ITemplate EmptyDataTemplate {
 632                         get { return emptyDataTemplate; }
 633                         set { emptyDataTemplate = value; RequireBinding (); }
 634                 }
 635
 636                 [LocalizableAttribute (true)]
 637                 [WebCategoryAttribute ("Appearance")]
 638                 [DefaultValueAttribute ("")]
 639                 public virtual string EmptyDataText {
 640                         get {
 641                                 object ob = ViewState ["EmptyDataText"];
 642                                 if (ob != null) return (string) ob;
 643                                 return string.Empty;
 644                         }
 645                         set {
 646                                 ViewState ["EmptyDataText"] = value;
 647                                 RequireBinding ();
 648                         }
 649                 }
 650
 651                 [WebCategoryAttribute ("Behavior")]
 652                 [DefaultValueAttribute (false)]
 653                 public virtual bool EnableSortingAndPagingCallbacks {
 654                         get {
 655                                 object ob = ViewState ["EnableSortingAndPagingCallbacks"];
 656                                 if (ob != null) return (bool) ob;
 657                                 return false;
 658                         }
 659                         set {
 660                                 ViewState ["EnableSortingAndPagingCallbacks"] = value;
 661                                 RequireBinding ();
 662                         }
 663                 }
 664
 665                 [DesignerSerializationVisibilityAttribute (DesignerSerializationVisibility.Hidden)]
 666                 [BrowsableAttribute (false)]
 667                 public virtual GridViewRow FooterRow {
 668                         get {
 669                                 if (table != null) {
 670                                         for (int index = table.Rows.Count - 1; index >= 0; index--) {
 671                                                 GridViewRow row = (GridViewRow) table.Rows [index];
 672                                                 switch (row.RowType) {
 673                                                 case DataControlRowType.Separator:
 674                                                 case DataControlRowType.Pager:
 675                                                         continue;
 676                                                 case DataControlRowType.Footer:
 677                                                         return row;
 678                                                 default:
 679                                                         break;
 680                                                 }
 681                                         }
 682                                 }
 683                                 return null;
 684                         }
 685                 }
 686
 687                 [WebCategoryAttribute ("Styles")]
 688                 [PersistenceMode (PersistenceMode.InnerProperty)]
 689                 [NotifyParentProperty (true)]
 690                 [DefaultValue (null)]
 691                 [DesignerSerializationVisibility (DesignerSerializationVisibility.Content)]
 692                 public TableItemStyle FooterStyle {
 693                         get {
 694                                 if (footerStyle == null) {
 695                                         footerStyle = new TableItemStyle ();
 696                                         if (IsTrackingViewState)
 697                                                 footerStyle.TrackViewState();
 698                                 }
 699                                 return footerStyle;
 700                         }
 701                 }
 702
 703                 [WebCategoryAttribute ("Appearance")]
 704                 [DefaultValueAttribute (GridLines.Both)]
 705                 public virtual GridLines GridLines {
 706                         get {
 707                                 if (ControlStyleCreated)
 708                                         return ((TableStyle) ControlStyle).GridLines;
 709                                 return GridLines.Both;
 710                         }
 711                         set {
 712                                 ((TableStyle) ControlStyle).GridLines = value;
 713                         }
 714                 }
 715
 716                 [DesignerSerializationVisibilityAttribute (DesignerSerializationVisibility.Hidden)]
 717                 [BrowsableAttribute (false)]
 718                 public virtual GridViewRow HeaderRow {
 719                         get {
 720                                 if (table != null) {
 721                                         for (int index = 0, total = table.Rows.Count; index < total; index++) {
 722                                                 GridViewRow row = (GridViewRow) table.Rows [index];
 723                                                 switch (row.RowType) {
 724                                                 case DataControlRowType.Separator:
 725                                                 case DataControlRowType.Pager:
 726                                                         continue;
 727                                                 case DataControlRowType.Header:
 728                                                         return row;
 729                                                 default:
 730                                                         break;
 731                                                 }
 732                                         }
 733                                 }
 734                                 return null;
 735                         }
 736                 }
 737
 738                 [WebCategoryAttribute ("Styles")]
 739                 [PersistenceMode (PersistenceMode.InnerProperty)]
 740                 [NotifyParentProperty (true)]
 741                 [DefaultValue (null)]
 742                 [DesignerSerializationVisibility (DesignerSerializationVisibility.Content)]
 743                 public TableItemStyle HeaderStyle {
 744                         get {
 745                                 if (headerStyle == null) {
 746                                         headerStyle = new TableItemStyle ();
 747                                         if (IsTrackingViewState)
 748                                                 headerStyle.TrackViewState();
 749                                 }
 750                                 return headerStyle;
 751                         }
 752                 }
 753
 754                 [Category ("Layout")]
 755                 [DefaultValueAttribute (HorizontalAlign.NotSet)]
 756                 public virtual HorizontalAlign HorizontalAlign {
 757                         get {
 758                                 if (ControlStyleCreated)
 759                                         return ((TableStyle) ControlStyle).HorizontalAlign;
 760                                 return HorizontalAlign.NotSet;
 761                         }
 762                         set {
 763                                 ((TableStyle) ControlStyle).HorizontalAlign = value;
 764                         }
 765                 }
 766
 767                 [BrowsableAttribute (false)]
 768                 [DesignerSerializationVisibilityAttribute (DesignerSerializationVisibility.Hidden)]
 769                 public virtual int PageCount {
 770                         get {
 771                                 return ViewState.GetInt ("PageCount", 0);
 772                         }
 773                         private set {
 774                                 ViewState ["PageCount"] = value;
 775                         }
 776                 }
 777
 778                 [WebCategoryAttribute ("Paging")]
 779                 [BrowsableAttribute (true)]
 780                 [DefaultValueAttribute (0)]
 781                 public virtual int PageIndex {
 782                         get {
 783                                 return pageIndex;
 784                         }
 785                         set {
 786                                 if (value == pageIndex)
 787                                         return;
 788                                 pageIndex = value;
 789                                 RequireBinding ();
 790                         }
 791                 }
 792
 793                 [DefaultValueAttribute (10)]
 794                 [WebCategoryAttribute ("Paging")]
 795                 public virtual int PageSize {
 796                         get {
 797                                 object ob = ViewState ["PageSize"];
 798                                 if (ob != null) return (int) ob;
 799                                 return 10;
 800                         }
 801                         set {
 802                                 ViewState ["PageSize"] = value;
 803                                 RequireBinding ();
 804                         }
 805                 }
 806
 807                 [WebCategoryAttribute ("Paging")]
 808                 [DesignerSerializationVisibilityAttribute (DesignerSerializationVisibility.Content)]
 809                 [NotifyParentPropertyAttribute (true)]
 810                 [PersistenceModeAttribute (PersistenceMode.InnerProperty)]
 811                 public virtual PagerSettings PagerSettings {
 812                         get {
 813                                 if (pagerSettings == null) {
 814                                         pagerSettings = new PagerSettings (this);
 815                                         if (IsTrackingViewState)
 816                                                 ((IStateManager)pagerSettings).TrackViewState ();
 817                                 }
 818                                 return pagerSettings;
 819                         }
 820                 }
 821
 822                 [WebCategoryAttribute ("Styles")]
 823                 [PersistenceMode (PersistenceMode.InnerProperty)]
 824                 [NotifyParentProperty (true)]
 825                 [DesignerSerializationVisibility (DesignerSerializationVisibility.Content)]
 826                 public TableItemStyle PagerStyle {
 827                         get {
 828                                 if (pagerStyle == null) {
 829                                         pagerStyle = new TableItemStyle ();
 830                                         if (IsTrackingViewState)
 831                                                 pagerStyle.TrackViewState();
 832                                 }
 833                                 return pagerStyle;
 834                         }
 835                 }
 836
 837
 838                 [DefaultValue (null)]
 839                 /* DataControlPagerCell isnt specified in the docs */
 840                 //[TemplateContainer (typeof(DataControlPagerCell), BindingDirection.OneWay)]
 841                 [PersistenceMode (PersistenceMode.InnerProperty)]
 842                 [Browsable (false)]
 843                 public virtual ITemplate PagerTemplate {
 844                         get { return pagerTemplate; }
 845                         set { pagerTemplate = value; RequireBinding (); }
 846                 }
 847
 848                 [DefaultValueAttribute ("")]
 849                 [WebCategoryAttribute ("Accessibility")]
 850                 //              [TypeConverterAttribute (typeof(System.Web.UI.Design.DataColumnSelectionConverter)]
 851                 public virtual string RowHeaderColumn {
 852                         get {
 853                                 object ob = ViewState ["RowHeaderColumn"];
 854                                 if (ob != null) return (string) ob;
 855                                 return string.Empty;
 856                         }
 857                         set {
 858                                 ViewState ["RowHeaderColumn"] = value;
 859                                 RequireBinding ();
 860                         }
 861                 }
 862
 863                 [DesignerSerializationVisibilityAttribute (DesignerSerializationVisibility.Hidden)]
 864                 [BrowsableAttribute (false)]
 865                 public virtual GridViewRowCollection Rows {
 866                         get {
 867                                 EnsureChildControls ();
 868                                 if (rows == null)
 869                                         rows = new GridViewRowCollection (new ArrayList ());
 870                                 return rows;
 871                         }
 872                 }
 873
 874                 [WebCategoryAttribute ("Styles")]
 875                 [PersistenceMode (PersistenceMode.InnerProperty)]
 876                 [NotifyParentProperty (true)]
 877                 [DesignerSerializationVisibility (DesignerSerializationVisibility.Content)]
 878                 public TableItemStyle RowStyle {
 879                         get {
 880                                 if (rowStyle == null) {
 881                                         rowStyle = new TableItemStyle ();
 882                                         if (IsTrackingViewState)
 883                                                 rowStyle.TrackViewState();
 884                                 }
 885                                 return rowStyle;
 886                         }
 887                 }
 888
 889                 [BrowsableAttribute (false)]
 890                 [DesignerSerializationVisibilityAttribute (DesignerSerializationVisibility.Hidden)]
 891                 public virtual DataKey SelectedDataKey {
 892                         get {
 893                                 if (DataKeyNames.Length == 0)
 894                                         throw new InvalidOperationException (String.Format ("Data keys must be specified on GridView '{0}' before the selected data keys can be retrieved.  Use the DataKeyNames property to specify data keys.", ID));
 895
 896                                 if (selectedIndex >= 0 && selectedIndex < DataKeys.Count) {
 897                                         return DataKeys [selectedIndex];
 898                                 } else
 899                                         return null;
 900                         }
 901                 }
 902
 903                 [BindableAttribute (true)]
 904                 [DefaultValueAttribute (-1)]
 905                 public virtual int SelectedIndex {
 906                         get {
 907                                 return selectedIndex;
 908                         }
 909                         set {
 910                                 if (rows != null && selectedIndex >= 0 && selectedIndex < Rows.Count) {
 911                                         int oldIndex = selectedIndex;
 912                                         selectedIndex = -1;
 913                                         Rows [oldIndex].RowState = GetRowState (oldIndex);
 914                                 }
 915                                 selectedIndex = value;
 916                                 if (rows != null && selectedIndex >= 0 && selectedIndex < Rows.Count) {
 917                                         Rows [selectedIndex].RowState = GetRowState (selectedIndex);
 918                                 }
 919                         }
 920                 }
 921
 922                 [BrowsableAttribute (false)]
 923                 [DesignerSerializationVisibilityAttribute (DesignerSerializationVisibility.Hidden)]
 924                 public virtual GridViewRow SelectedRow {
 925                         get {
 926                                 if (selectedIndex >= 0 && selectedIndex < Rows.Count) {
 927                                         return Rows [selectedIndex];
 928                                 } else
 929                                         return null;
 930                         }
 931                 }
 932
 933                 [WebCategoryAttribute ("Styles")]
 934                 [PersistenceMode (PersistenceMode.InnerProperty)]
 935                 [NotifyParentProperty (true)]
 936                 [DesignerSerializationVisibility (DesignerSerializationVisibility.Content)]
 937                 public TableItemStyle SelectedRowStyle {
 938                         get {
 939                                 if (selectedRowStyle == null) {
 940                                         selectedRowStyle = new TableItemStyle ();
 941                                         if (IsTrackingViewState)
 942                                                 selectedRowStyle.TrackViewState();
 943                                 }
 944                                 return selectedRowStyle;
 945                         }
 946                 }
 947
 948                 [BrowsableAttribute (false)]
 949                 public object SelectedValue {
 950                         get {
 951                                 if (SelectedDataKey != null)
 952                                         return SelectedDataKey.Value;
 953                                 else
 954                                         return null;
 955                         }
 956                 }
 957
 958                 [WebCategoryAttribute ("Appearance")]
 959                 [DefaultValueAttribute (false)]
 960                 public virtual bool ShowFooter {
 961                         get {
 962                                 object ob = ViewState ["ShowFooter"];
 963                                 if (ob != null) return (bool) ob;
 964                                 return false;
 965                         }
 966                         set {
 967                                 ViewState ["ShowFooter"] = value;
 968                                 RequireBinding ();
 969                         }
 970                 }
 971
 972                 [WebCategoryAttribute ("Appearance")]
 973                 [DefaultValueAttribute (true)]
 974                 public virtual bool ShowHeader {
 975                         get {
 976                                 object ob = ViewState ["ShowHeader"];
 977                                 if (ob != null) return (bool) ob;
 978                                 return true;
 979                         }
 980                         set {
 981                                 ViewState ["ShowHeader"] = value;
 982                                 RequireBinding ();
 983                         }
 984                 }
 985
 986                 [PersistenceModeAttribute (PersistenceMode.InnerProperty)]
 987                 [BrowsableAttribute (false)]
 988                 [DefaultValueAttribute (SortDirection.Ascending)]
 989                 [DesignerSerializationVisibilityAttribute (DesignerSerializationVisibility.Hidden)]
 990                 public virtual SortDirection SortDirection {
 991                         get { return sortDirection; }
 992                         private set {
 993                                 if (sortDirection == value)
 994                                         return;
 995                                 sortDirection = value;
 996                                 RequireBinding ();
 997                         }
 998                 }
 999
1000                 [BrowsableAttribute (false)]
1001                 [DesignerSerializationVisibilityAttribute (DesignerSerializationVisibility.Hidden)]
1002                 public virtual string SortExpression {
1003                         get {
1004                                 if (sortExpression == null)
1005                                         return String.Empty;
1006                                 return sortExpression;
1007                         }
1008                         private set {
1009                                 if (sortExpression == value)
1010                                         return;
1011                                 sortExpression = value;
1012                                 RequireBinding ();
1013                         }
1014                 }
1015
1016                 [DesignerSerializationVisibilityAttribute (DesignerSerializationVisibility.Hidden)]
1017                 [BrowsableAttribute (false)]
1018                 public virtual GridViewRow TopPagerRow {
1019                         get {
1020                                 EnsureDataBound ();
1021                                 return topPagerRow;
1022                         }
1023                 }
1024
1025                 [WebCategoryAttribute ("Accessibility")]
1026                 [DefaultValueAttribute (true)]
1027                 public virtual bool UseAccessibleHeader {
1028                         get {
1029                                 object ob = ViewState ["UseAccessibleHeader"];
1030                                 if (ob != null) return (bool) ob;
1031                                 return true;
1032                         }
1033                         set {
1034                                 ViewState ["UseAccessibleHeader"] = value;
1035                                 RequireBinding ();
1036                         }
1037                 }
1038
1039                 public virtual bool IsBindableType (Type type)
1040                 {
1041                         return type.IsPrimitive || type == typeof(string) || type == typeof(DateTime) || type == typeof(Guid);
1042                 }
1043
1044                 // MSDN: The CreateDataSourceSelectArguments method is a helper method called by
1045                 // the GridView control to create the DataSourceSelectArguments object that
1046                 // contains the arguments passed to the data source. In this implementation,
1047                 // the DataSourceSelectArguments object contains the arguments for paging operations.
1048                 protected override DataSourceSelectArguments CreateDataSourceSelectArguments ()
1049                 {
1050                         DataSourceSelectArguments arg = DataSourceSelectArguments.Empty;
1051                         DataSourceView view= GetData();
1052                         if (AllowPaging && view.CanPage) {
1053                                 arg.StartRowIndex = PageIndex * PageSize;
1054                                 if (view.CanRetrieveTotalRowCount) {
1055                                         arg.RetrieveTotalRowCount = true;
1056                                         arg.MaximumRows = PageSize;
1057                                 }
1058                                 else {
1059                                         arg.MaximumRows = -1;
1060                                 }
1061                         }
1062
1063                         if (IsBoundUsingDataSourceID && !String.IsNullOrEmpty (sortExpression)) {
1064                                 if (sortDirection == SortDirection.Ascending)
1065                                         arg.SortExpression = sortExpression;
1066                                 else
1067                                         arg.SortExpression = sortExpression + " DESC";
1068                         }
1069
1070                         return arg;
1071                 }
1072
1073                 protected virtual ICollection CreateColumns (PagedDataSource dataSource, bool useDataSource)
1074                 {
1075                         ArrayList fields = new ArrayList ();
1076
1077                         if (AutoGenerateEditButton || AutoGenerateDeleteButton || AutoGenerateSelectButton) {
1078                                 CommandField field = new CommandField ();
1079                                 field.ShowEditButton = AutoGenerateEditButton;
1080                                 field.ShowDeleteButton = AutoGenerateDeleteButton;
1081                                 field.ShowSelectButton = AutoGenerateSelectButton;
1082                                 fields.Add (field);
1083                         }
1084
1085                         fields.AddRange (Columns);
1086
1087                         if (AutoGenerateColumns) {
1088                                 if (useDataSource)
1089                                         autoFieldProperties = CreateAutoFieldProperties (dataSource);
1090
1091                                 if (autoFieldProperties != null) {
1092                                         foreach (AutoGeneratedFieldProperties props in autoFieldProperties)
1093                                                 fields.Add (CreateAutoGeneratedColumn (props));
1094                                 }
1095                         }
1096
1097                         return fields;
1098                 }
1099
1100                 protected virtual AutoGeneratedField CreateAutoGeneratedColumn (AutoGeneratedFieldProperties fieldProperties)
1101                 {
1102                         return new AutoGeneratedField (fieldProperties);
1103                 }
1104
1105                 AutoGeneratedFieldProperties[] CreateAutoFieldProperties (PagedDataSource source)
1106                 {
1107                         if(source == null) return null;
1108
1109                         PropertyDescriptorCollection props = source.GetItemProperties (new PropertyDescriptor[0]);
1110                         Type prop_type;
1111
1112                         ArrayList retVal = new ArrayList();
1113
1114                         if (props == null)
1115                         {
1116                                 object fitem = null;
1117                                 prop_type = null;
1118                                 PropertyInfo prop_item =  source.DataSource.GetType().GetProperty("Item",
1119                                                                                                   BindingFlags.Instance | BindingFlags.Static |
1120                                                                                                   BindingFlags.Public, null, null,
1121                                                                                                   new Type[] { typeof(int) }, null);
1122
1123                                 if (prop_item != null) {
1124                                         prop_type = prop_item.PropertyType;
1125                                 }
1126
1127                                 if (prop_type == null || prop_type == typeof(object)) {
1128                                         IEnumerator en = source.GetEnumerator();
1129                                         if (en.MoveNext())
1130                                                 fitem = en.Current;
1131                                         if (fitem != null)
1132                                                 prop_type = fitem.GetType();
1133                                 }
1134
1135                                 if (fitem != null && fitem is ICustomTypeDescriptor) {
1136                                         props = TypeDescriptor.GetProperties(fitem);
1137                                 } else if (prop_type != null) {
1138                                         if (IsBindableType (prop_type)) {
1139                                                 AutoGeneratedFieldProperties field = new AutoGeneratedFieldProperties ();
1140                                                 ((IStateManager)field).TrackViewState();
1141                                                 field.Name = "Item";
1142                                                 field.DataField = BoundField.ThisExpression;
1143                                                 field.Type = prop_type;
1144                                                 retVal.Add (field);
1145                                         } else {
1146                                                 props = TypeDescriptor.GetProperties (prop_type);
1147                                         }
1148                                 }
1149                         }
1150
1151                         if (props != null && props.Count > 0)
1152                         {
1153                                 foreach (PropertyDescriptor current in props) {
1154                                         if (IsBindableType (current.PropertyType)) {
1155                                                 AutoGeneratedFieldProperties field = new AutoGeneratedFieldProperties ();
1156                                                 ((IStateManager)field).TrackViewState();
1157                                                 field.Name = current.Name;
1158                                                 field.DataField = current.Name;
1159                                                 for (int i = 0; i < DataKeyNames.Length; i++) {
1160                                                         if (string.Compare (DataKeyNames [i], current.Name, StringComparison.InvariantCultureIgnoreCase) == 0) {
1161                                                                 field.IsReadOnly = true;
1162                                                                 break;
1163                                                         }
1164                                                 }
1165                                                 field.Type = current.PropertyType;
1166                                                 retVal.Add (field);
1167                                         }
1168                                 }
1169                         }
1170
1171                         if (retVal.Count > 0)
1172                                 return (AutoGeneratedFieldProperties[]) retVal.ToArray (typeof(AutoGeneratedFieldProperties));
1173                         else
1174                                 return new AutoGeneratedFieldProperties [0];
1175                 }
1176
1177                 protected virtual GridViewRow CreateRow (int rowIndex, int dataSourceIndex, DataControlRowType rowType, DataControlRowState rowState)
1178                 {
1179                         GridViewRow row = new GridViewRow (rowIndex, dataSourceIndex, rowType, rowState);
1180                         return row;
1181                 }
1182
1183                 void RequireBinding ()
1184                 {
1185                         if (Initialized) {
1186                                 RequiresDataBinding = true;
1187                         }
1188                 }
1189
1190                 protected virtual Table CreateChildTable ()
1191                 {
1192                         return new ContainedTable (this);
1193                 }
1194
1195                 protected override int CreateChildControls (IEnumerable data, bool dataBinding)
1196                 {
1197                         // clear GridView
1198                         Controls.Clear ();
1199                         table = null;
1200                         rows = null;
1201
1202                         if (data == null) {
1203                                 return 0;
1204                         }
1205
1206                         PagedDataSource dataSource;
1207
1208                         if (dataBinding) {
1209                                 DataSourceView view = GetData ();
1210                                 dataSource = new PagedDataSource ();
1211                                 dataSource.DataSource = data;
1212
1213                                 if (AllowPaging) {
1214                                         dataSource.AllowPaging = true;
1215                                         dataSource.PageSize = PageSize;
1216                                         dataSource.CurrentPageIndex = PageIndex;
1217                                         if (view.CanPage) {
1218                                                 dataSource.AllowServerPaging = true;
1219                                                 if (SelectArguments.RetrieveTotalRowCount)
1220                                                         dataSource.VirtualCount = SelectArguments.TotalRowCount;
1221                                         }
1222                                 }
1223
1224                                 PageCount = dataSource.PageCount;
1225                         }
1226                         else
1227                         {
1228                                 dataSource = new PagedDataSource ();
1229                                 dataSource.DataSource = data;
1230                                 if (AllowPaging) {
1231                                         dataSource.AllowPaging = true;
1232                                         dataSource.PageSize = PageSize;
1233                                         dataSource.CurrentPageIndex = PageIndex;
1234                                 }
1235                         }
1236
1237                         bool showPager = AllowPaging && (PageCount > 1);
1238
1239                         ArrayList list = new ArrayList ();
1240
1241                         // Creates the set of fields to show
1242
1243                         ICollection fieldCollection = CreateColumns (dataSource, dataBinding);
1244                         DataControlField[] fields = new DataControlField [fieldCollection.Count];
1245                         fieldCollection.CopyTo (fields, 0);
1246
1247                         foreach (DataControlField field in fields) {
1248                                 field.Initialize (AllowSorting, this);
1249                                 if (EnableSortingAndPagingCallbacks)
1250                                         field.ValidateSupportsCallback ();
1251                         }
1252
1253                         // Main table creation
1254                         foreach (object obj in dataSource) {
1255
1256                                 if (list.Count == 0) {
1257                                         if (showPager && PagerSettings.Position == PagerPosition.Top || PagerSettings.Position == PagerPosition.TopAndBottom) {
1258                                                 topPagerRow = CreatePagerRow (fields.Length, dataSource);
1259                                                 OnRowCreated (new GridViewRowEventArgs (topPagerRow));
1260                                                 ContainedTable.Rows.Add (topPagerRow);
1261                                         }
1262
1263                                         GridViewRow headerRow = CreateRow (-1, -1, DataControlRowType.Header, DataControlRowState.Normal);
1264                                         InitializeRow (headerRow, fields);
1265                                         OnRowCreated (new GridViewRowEventArgs (headerRow));
1266                                         ContainedTable.Rows.Add (headerRow);
1267                                         if (dataBinding) {
1268                                                 headerRow.DataBind ();
1269                                                 OnRowDataBound (new GridViewRowEventArgs (headerRow));
1270                                         }
1271                                 }
1272
1273                                 DataControlRowState rstate = GetRowState (list.Count);
1274                                 GridViewRow row = CreateRow (list.Count, list.Count, DataControlRowType.DataRow, rstate);
1275                                 row.DataItem = obj;
1276                                 list.Add (row);
1277                                 InitializeRow (row, fields);
1278                                 OnRowCreated (new GridViewRowEventArgs (row));
1279                                 ContainedTable.Rows.Add (row);
1280                                 if (dataBinding) {
1281                                         row.DataBind ();
1282                                         OnRowDataBound (new GridViewRowEventArgs (row));
1283                                         if (EditIndex == row.RowIndex)
1284                                                 oldEditValues = new DataKey (GetRowValues (row, true, true));
1285                                         DataKeyArrayList.Add (new DataKey (CreateRowDataKey (row), DataKeyNames));
1286                                 }
1287                         }
1288
1289                         if (list.Count == 0) {
1290                                 GridViewRow emptyRow = CreateEmptyrRow (fields.Length);
1291                                 if (emptyRow != null) {
1292                                         OnRowCreated (new GridViewRowEventArgs (emptyRow));
1293                                         ContainedTable.Rows.Add (emptyRow);
1294                                         if (dataBinding) {
1295                                                 emptyRow.DataBind ();
1296                                                 OnRowDataBound (new GridViewRowEventArgs (emptyRow));
1297                                         }
1298                                 }
1299                                 return 0;
1300                         }
1301                         else {
1302                                 GridViewRow footerRow = CreateRow (-1, -1, DataControlRowType.Footer, DataControlRowState.Normal);
1303                                 InitializeRow (footerRow, fields);
1304                                 OnRowCreated (new GridViewRowEventArgs (footerRow));
1305                                 ContainedTable.Rows.Add (footerRow);
1306                                 if (dataBinding) {
1307                                         footerRow.DataBind ();
1308                                         OnRowDataBound (new GridViewRowEventArgs (footerRow));
1309                                 }
1310
1311                                 if (showPager && PagerSettings.Position == PagerPosition.Bottom || PagerSettings.Position == PagerPosition.TopAndBottom) {
1312                                         bottomPagerRow = CreatePagerRow (fields.Length, dataSource);
1313                                         OnRowCreated (new GridViewRowEventArgs (bottomPagerRow));
1314                                         ContainedTable.Rows.Add (bottomPagerRow);
1315                                 }
1316                         }
1317
1318                         rows = new GridViewRowCollection (list);
1319
1320                         if (!dataBinding)
1321                                 return -1;
1322
1323                         if (AllowPaging)
1324                                 return dataSource.DataSourceCount;
1325                         else
1326                                 return list.Count;
1327                 }
1328
1329                 Table ContainedTable  {
1330                         get {
1331                                 if (table == null) {
1332                                         table = CreateChildTable ();
1333                                         Controls.Add (table);
1334                                 }
1335                                 return table;
1336                         }
1337                 }
1338
1339                 protected override Style CreateControlStyle ()
1340                 {
1341                         TableStyle style = new TableStyle (ViewState);
1342                         style.GridLines = GridLines.Both;
1343                         style.CellSpacing = 0;
1344                         return style;
1345                 }
1346
1347                 DataControlRowState GetRowState (int index)
1348                 {
1349                         DataControlRowState rstate = (index % 2) == 0 ? DataControlRowState.Normal : DataControlRowState.Alternate;
1350                         if (index == SelectedIndex) rstate |= DataControlRowState.Selected;
1351                         if (index == EditIndex) rstate |= DataControlRowState.Edit;
1352                         return rstate;
1353                 }
1354
1355                 GridViewRow CreatePagerRow (int fieldCount, PagedDataSource dataSource)
1356                 {
1357                         GridViewRow row = CreateRow (-1, -1, DataControlRowType.Pager, DataControlRowState.Normal);
1358                         InitializePager (row, fieldCount, dataSource);
1359                         return row;
1360                 }
1361
1362                 protected virtual void InitializePager (GridViewRow row, int columnSpan, PagedDataSource dataSource)
1363                 {
1364                         TableCell cell = new TableCell ();
1365                         if (columnSpan > 1)
1366                                 cell.ColumnSpan = columnSpan;
1367
1368                         if (pagerTemplate != null)
1369                                 pagerTemplate.InstantiateIn (cell);
1370                         else
1371                                 cell.Controls.Add (PagerSettings.CreatePagerControl (dataSource.CurrentPageIndex, dataSource.PageCount));
1372
1373                         row.Cells.Add (cell);
1374                 }
1375
1376                 GridViewRow CreateEmptyrRow (int fieldCount)
1377                 {
1378                         if (emptyDataTemplate == null && String.IsNullOrEmpty (EmptyDataText))
1379                                 return null;
1380
1381                         GridViewRow row = CreateRow (-1, -1, DataControlRowType.EmptyDataRow, DataControlRowState.Normal);
1382                         TableCell cell = new TableCell ();
1383                         cell.ColumnSpan = fieldCount;
1384
1385                         if (emptyDataTemplate != null)
1386                                 emptyDataTemplate.InstantiateIn (cell);
1387                         else
1388                                 cell.Text = EmptyDataText;
1389
1390                         row.Cells.Add (cell);
1391                         return row;
1392                 }
1393
1394                 protected virtual void InitializeRow (GridViewRow row, DataControlField[] fields)
1395                 {
1396                         DataControlCellType ctype;
1397                         bool accessibleHeader = false;
1398
1399                         switch (row.RowType) {
1400                         case DataControlRowType.Header:
1401                                 ctype = DataControlCellType.Header;
1402                                 accessibleHeader = UseAccessibleHeader;
1403                                 break;
1404                         case DataControlRowType.Footer:
1405                                 ctype = DataControlCellType.Footer;
1406                                 break;
1407                         default:
1408                                 ctype = DataControlCellType.DataCell;
1409                                 break;
1410                         }
1411
1412                         for (int n=0; n<fields.Length; n++) {
1413                                 DataControlField field = fields [n];
1414                                 DataControlFieldCell cell;
1415                                 if (((field is BoundField) && ((BoundField)field).DataField == RowHeaderColumn) || accessibleHeader)
1416                                         cell = new DataControlFieldHeaderCell (field, accessibleHeader ? TableHeaderScope.Column : TableHeaderScope.Row);
1417                                 else
1418                                         cell = new DataControlFieldCell (field);
1419                                 row.Cells.Add (cell);
1420                                 field.InitializeCell (cell, ctype, row.RowState, row.RowIndex);
1421                         }
1422                 }
1423
1424                 IOrderedDictionary CreateRowDataKey (GridViewRow row)
1425                 {
1426                         if (cachedKeyProperties == null) {
1427                                 PropertyDescriptorCollection props = TypeDescriptor.GetProperties (row.DataItem);
1428                                 cachedKeyProperties = new PropertyDescriptor [DataKeyNames.Length];
1429                                 for (int n=0; n<DataKeyNames.Length; n++) {
1430                                         PropertyDescriptor p = props.Find (DataKeyNames [n], true);
1431                                         if (p == null)
1432                                                 throw new InvalidOperationException ("Property '" + DataKeyNames [n] + "' not found in object of type " + row.DataItem.GetType ());
1433                                         cachedKeyProperties [n] = p;
1434                                 }
1435                         }
1436
1437                         OrderedDictionary dic = new OrderedDictionary ();
1438                         foreach (PropertyDescriptor p in cachedKeyProperties)
1439                                 dic [p.Name] = p.GetValue (row.DataItem);
1440                         return dic;
1441                 }
1442
1443                 IOrderedDictionary GetRowValues (GridViewRow row, bool includeReadOnlyFields, bool includePrimaryKey)
1444                 {
1445                         OrderedDictionary dic = new OrderedDictionary ();
1446                         ExtractRowValues (dic, row, includeReadOnlyFields, includePrimaryKey);
1447                         return dic;
1448                 }
1449
1450                 protected virtual void ExtractRowValues (IOrderedDictionary fieldValues, GridViewRow row, bool includeReadOnlyFields, bool includePrimaryKey)
1451                 {
1452                         foreach (TableCell cell in row.Cells) {
1453                                 DataControlFieldCell c = cell as DataControlFieldCell;
1454                                 if (c != null)
1455                                         c.ContainingField.ExtractValuesFromCell (fieldValues, c, row.RowState, includeReadOnlyFields);
1456                         }
1457                         if (!includePrimaryKey && DataKeyNames != null)
1458                                 foreach (string key in DataKeyNames)
1459                                         fieldValues.Remove (key);
1460                 }
1461
1462                 protected override HtmlTextWriterTag TagKey {
1463                         get {
1464                                 if (EnableSortingAndPagingCallbacks)
1465                                         return HtmlTextWriterTag.Div;
1466                                 else
1467                                         return HtmlTextWriterTag.Table;
1468                         }
1469                 }
1470
1471                 public sealed override void DataBind ()
1472                 {
1473                         DataKeyArrayList.Clear ();
1474                         cachedKeyProperties = null;
1475                         base.DataBind ();
1476
1477                         keys = new DataKeyArray (DataKeyArrayList);
1478                 }
1479
1480                 protected internal override void PerformDataBinding (IEnumerable data)
1481                 {
1482                         base.PerformDataBinding (data);
1483                 }
1484
1485                 protected internal virtual void PrepareControlHierarchy ()
1486                 {
1487                         if (table == null)
1488                                 return;
1489
1490                         table.Caption = Caption;
1491                         table.CaptionAlign = CaptionAlign;
1492
1493                         foreach (GridViewRow row in table.Rows) {
1494                                 switch (row.RowType) {
1495                                 case DataControlRowType.Header:
1496                                         if (headerStyle != null && !headerStyle.IsEmpty)
1497                                                 row.ControlStyle.CopyFrom(headerStyle);
1498                                         row.Visible = ShowHeader;
1499                                         break;
1500                                 case DataControlRowType.Footer:
1501                                         if (footerStyle != null && !footerStyle.IsEmpty)
1502                                                 row.ControlStyle.CopyFrom (footerStyle);
1503                                         row.Visible = ShowFooter;
1504                                         break;
1505                                 case DataControlRowType.Pager:
1506                                         if (pagerStyle != null && !pagerStyle.IsEmpty)
1507                                                 row.ControlStyle.CopyFrom (pagerStyle);
1508                                         break;
1509                                 case DataControlRowType.EmptyDataRow:
1510                                         if (emptyDataRowStyle != null && !emptyDataRowStyle.IsEmpty)
1511                                                 row.ControlStyle.CopyFrom (emptyDataRowStyle);
1512                                         break;
1513                                 case DataControlRowType.DataRow:
1514                                         if (rowStyle != null && !rowStyle.IsEmpty)
1515                                                 row.ControlStyle.CopyFrom (rowStyle);
1516                                         if ((row.RowState & DataControlRowState.Alternate) != 0 && alternatingRowStyle != null && !alternatingRowStyle.IsEmpty)
1517                                                 row.ControlStyle.CopyFrom (alternatingRowStyle);
1518                                         if ((row.RowState & DataControlRowState.Selected) != 0 && selectedRowStyle != null && !selectedRowStyle.IsEmpty)
1519                                                 row.ControlStyle.CopyFrom (selectedRowStyle);
1520                                         if ((row.RowState & DataControlRowState.Edit) != 0 && editRowStyle != null && !editRowStyle.IsEmpty)
1521                                                 row.ControlStyle.CopyFrom (editRowStyle);
1522                                         break;
1523                                 default:
1524                                         break;
1525                                 }
1526
1527                                 foreach (TableCell cell in row.Cells) {
1528                                         DataControlFieldCell fcell = cell as DataControlFieldCell;
1529                                         if (fcell != null) {
1530                                                 DataControlField field = fcell.ContainingField;
1531                                                 switch (row.RowType) {
1532                                                 case DataControlRowType.Header:
1533                                                         if (field.HeaderStyleCreated && !field.HeaderStyle.IsEmpty)
1534                                                                 cell.ControlStyle.CopyFrom (field.HeaderStyle);
1535                                                         break;
1536                                                 case DataControlRowType.Footer:
1537                                                         if (field.FooterStyleCreated && !field.FooterStyle.IsEmpty)
1538                                                                 cell.ControlStyle.CopyFrom (field.FooterStyle);
1539                                                         break;
1540                                                 default:
1541                                                         if (field.ControlStyleCreated && !field.ControlStyle.IsEmpty)
1542                                                                 foreach (Control c in cell.Controls) {
1543                                                                         WebControl wc = c as WebControl;
1544                                                                         if (wc != null)
1545                                                                                 wc.ControlStyle.MergeWith (field.ControlStyle);
1546                                                                 }
1547                                                         if (field.ItemStyleCreated && !field.ItemStyle.IsEmpty)
1548                                                                 cell.ControlStyle.CopyFrom (field.ItemStyle);
1549                                                         break;
1550                                                 }
1551                                         }
1552                                 }
1553                         }
1554                 }
1555
1556                 protected internal override void OnInit (EventArgs e)
1557                 {
1558                         Page.RegisterRequiresControlState (this);
1559                         base.OnInit (e);
1560                 }
1561
1562                 void OnFieldsChanged (object sender, EventArgs args)
1563                 {
1564                         RequireBinding ();
1565                 }
1566
1567                 protected override void OnDataPropertyChanged ()
1568                 {
1569                         base.OnDataPropertyChanged ();
1570                         RequireBinding ();
1571                 }
1572
1573                 protected override void OnDataSourceViewChanged (object sender, EventArgs e)
1574                 {
1575                         base.OnDataSourceViewChanged (sender, e);
1576                         RequireBinding ();
1577                 }
1578
1579                 protected override bool OnBubbleEvent (object source, EventArgs e)
1580                 {
1581                         GridViewCommandEventArgs args = e as GridViewCommandEventArgs;
1582                         if (args != null) {
1583                                 bool causesValidation = false;
1584                                 IButtonControl button = args.CommandSource as IButtonControl;
1585                                 if (button != null && button.CausesValidation) {
1586                                         Page.Validate (button.ValidationGroup);
1587                                         causesValidation = true;
1588                                 }
1589                                 OnRowCommand (args);
1590                                 string param = args.CommandArgument as string;
1591                                 if (param == null || param.Length == 0) {
1592                                         GridViewRow row = args.Row;
1593                                         if (row != null)
1594                                                 param = row.RowIndex.ToString();
1595                                 }
1596                                 ProcessEvent (args.CommandName, param, causesValidation);
1597                                 return true;
1598                         }
1599                         return base.OnBubbleEvent (source, e);
1600                 }
1601
1602                 void IPostBackEventHandler.RaisePostBackEvent (string eventArgument)
1603                 {
1604                         RaisePostBackEvent (eventArgument);
1605                 }
1606
1607                 // This is prolly obsolete
1608                 protected virtual void RaisePostBackEvent (string eventArgument)
1609                 {
1610                         int i = eventArgument.IndexOf ('$');
1611                         if (i != -1)
1612                                 ProcessEvent (eventArgument.Substring (0, i), eventArgument.Substring (i + 1), false);
1613                         else
1614                                 ProcessEvent (eventArgument, null, false);
1615                 }
1616
1617                 void ProcessEvent (string eventName, string param, bool causesValidation)
1618                 {
1619                         switch (eventName)
1620                         {
1621                         case DataControlCommands.PageCommandName:
1622                                 int newIndex = -1;
1623                                 switch (param) {
1624                                 case DataControlCommands.FirstPageCommandArgument:
1625                                         newIndex = 0;
1626                                         break;
1627                                 case DataControlCommands.LastPageCommandArgument:
1628                                         newIndex = PageCount - 1;
1629                                         break;
1630                                 case DataControlCommands.NextPageCommandArgument:
1631                                         newIndex = PageIndex + 1;
1632                                         break;
1633                                 case DataControlCommands.PreviousPageCommandArgument:
1634                                         newIndex = PageIndex - 1;
1635                                         break;
1636                                 default:
1637                                         int paramIndex = 0;
1638                                         int.TryParse (param, out paramIndex);
1639                                         newIndex = paramIndex - 1;
1640                                         break;
1641                                 }
1642                                 ShowPage (newIndex);
1643                                 break;
1644
1645                         case DataControlCommands.FirstPageCommandArgument:
1646                                 ShowPage (0);
1647                                 break;
1648
1649                         case DataControlCommands.LastPageCommandArgument:
1650                                 ShowPage (PageCount - 1);
1651                                 break;
1652
1653                         case DataControlCommands.NextPageCommandArgument:
1654                                 if (PageIndex < PageCount - 1)
1655                                         ShowPage (PageIndex + 1);
1656                                 break;
1657
1658                         case DataControlCommands.PreviousPageCommandArgument:
1659                                 if (PageIndex > 0)
1660                                         ShowPage (PageIndex - 1);
1661                                 break;
1662
1663                         case DataControlCommands.SelectCommandName:
1664                                 SelectRow (int.Parse (param));
1665                                 break;
1666
1667                         case DataControlCommands.EditCommandName:
1668                                 EditRow (int.Parse (param));
1669                                 break;
1670
1671                         case DataControlCommands.UpdateCommandName:
1672                                 int editIndex = int.Parse (param);
1673                                 UpdateRow (Rows [editIndex], editIndex, causesValidation);
1674                                 break;
1675
1676                         case DataControlCommands.CancelCommandName:
1677                                 CancelEdit ();
1678                                 break;
1679
1680                         case DataControlCommands.DeleteCommandName:
1681                                 DeleteRow (int.Parse (param));
1682                                 break;
1683
1684                         case DataControlCommands.SortCommandName:
1685                                 Sort (param);
1686                                 break;
1687                         }
1688                 }
1689
1690                 void Sort (string newSortExpression)
1691                 {
1692                         SortDirection newDirection = SortDirection.Ascending;
1693                         if (sortExpression == newSortExpression && sortDirection == SortDirection.Ascending)
1694                                 newDirection = SortDirection.Descending;
1695
1696                         Sort (newSortExpression, newDirection);
1697                 }
1698
1699                 public virtual void Sort (string newSortExpression, SortDirection newSortDirection)
1700                 {
1701                         GridViewSortEventArgs args = new GridViewSortEventArgs (newSortExpression, newSortDirection);
1702                         OnSorting (args);
1703                         if (args.Cancel) return;
1704
1705                 if (IsBoundUsingDataSourceID) {
1706                         EditIndex = -1;
1707                         PageIndex = 0;
1708                         SortExpression = args.SortExpression;
1709                         SortDirection = args.SortDirection;
1710                 }
1711
1712                         OnSorted (EventArgs.Empty);
1713                 }
1714
1715                 void SelectRow (int index)
1716                 {
1717                         GridViewSelectEventArgs args = new GridViewSelectEventArgs (index);
1718                         OnSelectedIndexChanging (args);
1719                         if (!args.Cancel) {
1720                                 RequireBinding ();
1721                                 SelectedIndex = args.NewSelectedIndex;
1722                                 OnSelectedIndexChanged (EventArgs.Empty);
1723                         }
1724                 }
1725
1726                 void ShowPage (int newIndex)
1727                 {
1728                         GridViewPageEventArgs args = new GridViewPageEventArgs (newIndex);
1729                         OnPageIndexChanging (args);
1730
1731                         if (args.Cancel || !IsBoundUsingDataSourceID)
1732                                 return;
1733
1734                         EndRowEdit ();
1735                         PageIndex = args.NewPageIndex;
1736                         OnPageIndexChanged (EventArgs.Empty);
1737                 }
1738
1739                 void EditRow (int index)
1740                 {
1741                         GridViewEditEventArgs args = new GridViewEditEventArgs (index);
1742                         OnRowEditing (args);
1743
1744                         if (args.Cancel || !IsBoundUsingDataSourceID)
1745                                 return;
1746
1747                         EditIndex = args.NewEditIndex;
1748                 }
1749
1750                 void CancelEdit ()
1751                 {
1752                         GridViewCancelEditEventArgs args = new GridViewCancelEditEventArgs (EditIndex);
1753                         OnRowCancelingEdit (args);
1754
1755                         if (args.Cancel || !IsBoundUsingDataSourceID)
1756                                 return;
1757
1758                         EndRowEdit ();
1759                 }
1760
1761                 [MonoTODO ("Support two-way binding expressions")]
1762                 public virtual void UpdateRow (int rowIndex, bool causesValidation)
1763                 {
1764                         if (rowIndex != EditIndex) throw new NotSupportedException ();
1765
1766                         GridViewRow row = Rows [rowIndex];
1767                         UpdateRow (row, rowIndex, causesValidation);
1768                 }
1769
1770                 void UpdateRow (GridViewRow row, int rowIndex, bool causesValidation)
1771                 {
1772                         if (causesValidation && Page != null && !Page.IsValid)
1773                                 return;
1774
1775                         currentEditOldValues = OldEditValues.Values;
1776
1777                         currentEditRowKeys = DataKeys [rowIndex].Values;
1778                         currentEditNewValues = GetRowValues (row, false, false);
1779
1780                         GridViewUpdateEventArgs args = new GridViewUpdateEventArgs (rowIndex, currentEditRowKeys, currentEditOldValues, currentEditNewValues);
1781                         OnRowUpdating (args);
1782
1783                         if (args.Cancel || !IsBoundUsingDataSourceID)
1784                                 return;
1785
1786                         DataSourceView view = GetData ();
1787                         if (view == null)
1788                                 throw new HttpException ("The DataSourceView associated to data bound control was null");
1789                         view.Update (currentEditRowKeys, currentEditNewValues, currentEditOldValues, new DataSourceViewOperationCallback (UpdateCallback));
1790                 }
1791
1792                 bool UpdateCallback (int recordsAffected, Exception exception)
1793                 {
1794                         GridViewUpdatedEventArgs dargs = new GridViewUpdatedEventArgs (recordsAffected, exception, currentEditRowKeys, currentEditOldValues, currentEditNewValues);
1795                         OnRowUpdated (dargs);
1796
1797                         if (!dargs.KeepInEditMode)
1798                                 EndRowEdit ();
1799
1800                         return dargs.ExceptionHandled;
1801                 }
1802
1803                 public virtual void DeleteRow (int rowIndex)
1804                 {
1805                         GridViewRow row = Rows [rowIndex];
1806                         currentEditRowKeys = DataKeys [rowIndex].Values;
1807                         currentEditNewValues = GetRowValues (row, true, true);
1808
1809                         GridViewDeleteEventArgs args = new GridViewDeleteEventArgs (rowIndex, currentEditRowKeys, currentEditNewValues);
1810                         OnRowDeleting (args);
1811
1812                         if (args.Cancel || !IsBoundUsingDataSourceID)
1813                                 return;
1814
1815                         RequireBinding ();
1816                         DataSourceView view = GetData ();
1817                         if (view != null)
1818                                 view.Delete (currentEditRowKeys, currentEditNewValues, new DataSourceViewOperationCallback (DeleteCallback));
1819                         else {
1820                                 GridViewDeletedEventArgs dargs = new GridViewDeletedEventArgs (0, null, currentEditRowKeys, currentEditNewValues);
1821                                 OnRowDeleted (dargs);
1822                         }
1823                 }
1824
1825                 bool DeleteCallback (int recordsAffected, Exception exception)
1826                 {
1827                         GridViewDeletedEventArgs dargs = new GridViewDeletedEventArgs (recordsAffected, exception, currentEditRowKeys, currentEditNewValues);
1828                         OnRowDeleted (dargs);
1829                         return dargs.ExceptionHandled;
1830                 }
1831
1832                 void EndRowEdit ()
1833                 {
1834                         EditIndex = -1;
1835                         oldEditValues = new DataKey (new OrderedDictionary ());
1836                         currentEditRowKeys = null;
1837                         currentEditOldValues = null;
1838                         currentEditNewValues = null;
1839                 }
1840
1841                 protected internal override void LoadControlState (object ob)
1842                 {
1843                         if (ob == null) return;
1844                         object[] state = (object[]) ob;
1845                         base.LoadControlState (state[0]);
1846                         pageIndex = (int) state[1];
1847                         selectedIndex = (int) state[2];
1848                         editIndex = (int) state[3];
1849                         sortExpression = (string) state[4];
1850                         sortDirection = (SortDirection) state[5];
1851                         DataKeyNames = (string []) state [6];
1852                         if (state [7] != null)
1853                                 LoadDataKeyArrayState ((object []) state [7]);
1854                         if (state [8] != null)
1855                                 ((IStateManager) OldEditValues).LoadViewState (state [8]);
1856                 }
1857
1858                 protected internal override object SaveControlState ()
1859                 {
1860                         if (EnableSortingAndPagingCallbacks) {
1861                                 Page.ClientScript.RegisterHiddenField (ClientID + "_Page", PageIndex.ToString ());
1862                                 Page.ClientScript.RegisterHiddenField (ClientID + "_SortExpression", SortExpression);
1863                                 Page.ClientScript.RegisterHiddenField (ClientID + "_SortDirection", ((int)SortDirection).ToString());
1864                         }
1865
1866                         object bstate = base.SaveControlState ();
1867                         return new object [] {
1868                                 bstate,
1869                                 pageIndex,
1870                                 selectedIndex,
1871                                 editIndex,
1872                                 sortExpression,
1873                                 sortDirection,
1874                                 DataKeyNames,
1875                                 SaveDataKeyArrayState (),
1876                                 (oldEditValues == null ? null : ((IStateManager)oldEditValues).SaveViewState ())
1877                                         };
1878                 }
1879
1880                 object [] SaveDataKeyArrayState ()
1881                 {
1882                         if (keys == null)
1883                                 return null;
1884
1885                         object [] state = new object [keys.Count];
1886                         for (int i = 0; i < keys.Count; i++) {
1887                                 state [i] = ((IStateManager) keys [i]).SaveViewState ();
1888                         }
1889                         return state;
1890                 }
1891
1892                 void LoadDataKeyArrayState (object [] state)
1893                 {
1894                         for (int i = 0; i < state.Length; i++) {
1895                                 DataKey dataKey = new DataKey (new OrderedDictionary (DataKeyNames.Length), DataKeyNames);
1896                                 ((IStateManager) dataKey).LoadViewState (state [i]);
1897                                 DataKeyArrayList.Add (dataKey);
1898                         }
1899                         keys = new DataKeyArray (DataKeyArrayList);
1900                 }
1901
1902                 protected override void TrackViewState()
1903                 {
1904                         base.TrackViewState();
1905                         if (columns != null) ((IStateManager)columns).TrackViewState();
1906                         if (pagerSettings != null) ((IStateManager)pagerSettings).TrackViewState();
1907                         if (alternatingRowStyle != null) ((IStateManager)alternatingRowStyle).TrackViewState();
1908                         if (footerStyle != null) ((IStateManager)footerStyle).TrackViewState();
1909                         if (headerStyle != null) ((IStateManager)headerStyle).TrackViewState();
1910                         if (pagerStyle != null) ((IStateManager)pagerStyle).TrackViewState();
1911                         if (rowStyle != null) ((IStateManager)rowStyle).TrackViewState();
1912                         if (selectedRowStyle != null) ((IStateManager)selectedRowStyle).TrackViewState();
1913                         if (editRowStyle != null) ((IStateManager)editRowStyle).TrackViewState();
1914                         if (emptyDataRowStyle != null) ((IStateManager)emptyDataRowStyle).TrackViewState();
1915                         if (keys != null) ((IStateManager)keys).TrackViewState();
1916                         if (autoFieldProperties != null) {
1917                                 foreach (IStateManager sm in autoFieldProperties)
1918                                         sm.TrackViewState ();
1919                         }
1920                 }
1921
1922                 protected override object SaveViewState()
1923                 {
1924                         object[] states = new object [12];
1925                         states[0] = base.SaveViewState();
1926                         states[1] = (columns == null ? null : ((IStateManager)columns).SaveViewState());
1927                         states[2] = (pagerSettings == null ? null : ((IStateManager)pagerSettings).SaveViewState());
1928                         states[3] = (alternatingRowStyle == null ? null : ((IStateManager)alternatingRowStyle).SaveViewState());
1929                         states[4] = (footerStyle == null ? null : ((IStateManager)footerStyle).SaveViewState());
1930                         states[5] = (headerStyle == null ? null : ((IStateManager)headerStyle).SaveViewState());
1931                         states[6] = (pagerStyle == null ? null : ((IStateManager)pagerStyle).SaveViewState());
1932                         states[7] = (rowStyle == null ? null : ((IStateManager)rowStyle).SaveViewState());
1933                         states[8] = (selectedRowStyle == null ? null : ((IStateManager)selectedRowStyle).SaveViewState());
1934                         states[9] = (editRowStyle == null ? null : ((IStateManager)editRowStyle).SaveViewState());
1935                         states[10] = (emptyDataRowStyle == null ? null : ((IStateManager)emptyDataRowStyle).SaveViewState());
1936
1937                         if (autoFieldProperties != null) {
1938                                 object[] data = new object [autoFieldProperties.Length];
1939                                 bool allNull = true;
1940                                 for (int n=0; n<data.Length; n++) {
1941                                         data [n] = ((IStateManager)autoFieldProperties [n]).SaveViewState ();
1942                                         if (data [n] != null) allNull = false;
1943                                 }
1944                                 if (!allNull) states [11] = data;
1945                         }
1946
1947                         for (int i = states.Length - 1; i >= 0; i--) {
1948                                 if (states [i] != null)
1949                                         return states;
1950                         }
1951
1952                         return null;
1953                 }
1954
1955                 protected override void LoadViewState (object savedState)
1956                 {
1957                         if (savedState == null) {
1958                                 base.LoadViewState (null);
1959                                 return;
1960                         }
1961
1962                         object [] states = (object []) savedState;
1963
1964                         if (states[11] != null) {
1965                                 object[] data = (object[]) states [11];
1966                                 autoFieldProperties = new AutoGeneratedFieldProperties [data.Length];
1967                                 for (int n=0; n<data.Length; n++) {
1968                                         IStateManager p = new AutoGeneratedFieldProperties ();
1969                                         p.TrackViewState ();
1970                                         p.LoadViewState (data [n]);
1971                                         autoFieldProperties [n] = (AutoGeneratedFieldProperties) p;
1972                                 }
1973                         }
1974
1975                         base.LoadViewState (states[0]);
1976
1977                         if (states[1] != null) ((IStateManager)Columns).LoadViewState (states[1]);
1978                         if (states[2] != null) ((IStateManager)PagerSettings).LoadViewState (states[2]);
1979                         if (states[3] != null) ((IStateManager)AlternatingRowStyle).LoadViewState (states[3]);
1980                         if (states[4] != null) ((IStateManager)FooterStyle).LoadViewState (states[4]);
1981                         if (states[5] != null) ((IStateManager)HeaderStyle).LoadViewState (states[5]);
1982                         if (states[6] != null) ((IStateManager)PagerStyle).LoadViewState (states[6]);
1983                         if (states[7] != null) ((IStateManager)RowStyle).LoadViewState (states[7]);
1984                         if (states[8] != null) ((IStateManager)SelectedRowStyle).LoadViewState (states[8]);
1985                         if (states[9] != null) ((IStateManager)EditRowStyle).LoadViewState (states[9]);
1986                         if (states[10] != null) ((IStateManager)EmptyDataRowStyle).LoadViewState (states[10]);
1987                 }
1988
1989                 void ICallbackEventHandler.RaiseCallbackEvent (string eventArgs)
1990                 {
1991                         RaiseCallbackEvent (eventArgs);
1992                 }
1993
1994                 protected virtual void RaiseCallbackEvent (string eventArgs)
1995                 {
1996                         string[] clientData = eventArgs.Split ('|');
1997                         PageIndex = int.Parse (clientData[0]);
1998                         SortExpression = HttpUtility.UrlDecode (clientData [1]);
1999                         SortDirection = (SortDirection) int.Parse (clientData [2]);
2000
2001                         RaisePostBackEvent (clientData[3]);
2002                         DataBind ();
2003                 }
2004
2005                 string ICallbackEventHandler.GetCallbackResult ()
2006                 {
2007                         return GetCallbackResult ();
2008                 }
2009
2010                 protected virtual string GetCallbackResult ()
2011                 {
2012                         PrepareControlHierarchy ();
2013
2014                         StringWriter sw = new StringWriter ();
2015                         sw.Write (PageIndex.ToString () + '|' + SortExpression + '|' + (int) SortDirection + '|');
2016
2017                         HtmlTextWriter writer = new HtmlTextWriter (sw);
2018                         RenderGrid (writer);
2019                         return sw.ToString ();
2020                 }
2021
2022                 string ICallbackContainer.GetCallbackScript (IButtonControl control, string argument)
2023                 {
2024                         return GetCallbackScript (control, argument);
2025                 }
2026
2027                 protected virtual string GetCallbackScript (IButtonControl control, string argument)
2028                 {
2029                         if (EnableSortingAndPagingCallbacks)
2030                                 return "javascript:GridView_ClientEvent (\"" + ClientID + "\",\"" + control.CommandName + "$" + control.CommandArgument + "\"); return false;";
2031                         else
2032                                 return null;
2033                 }
2034
2035                 protected override void OnPagePreLoad (object sender, EventArgs e)
2036                 {
2037                         base.OnPagePreLoad (sender, e);
2038
2039                         if (Page.IsPostBack && EnableSortingAndPagingCallbacks) {
2040                                 int page;
2041                                 if (int.TryParse (Page.Request.Form [ClientID + "_Page"], out page))
2042                                         PageIndex = page;
2043                                 int dir;
2044                                 if (int.TryParse (Page.Request.Form [ClientID + "_SortDirection"], out dir))
2045                                         SortDirection = (SortDirection) dir;
2046                                 SortExpression = Page.Request.Form [ClientID + "_SortExpression"];
2047                         }
2048                 }
2049
2050                 protected internal override void OnPreRender (EventArgs e)
2051                 {
2052                         base.OnPreRender (e);
2053
2054                         if (EnableSortingAndPagingCallbacks)
2055                         {
2056                                 if (!Page.ClientScript.IsClientScriptIncludeRegistered (typeof(GridView), "GridView.js")) {
2057                                         string url = Page.ClientScript.GetWebResourceUrl (typeof(GridView), "GridView.js");
2058                                         Page.ClientScript.RegisterClientScriptInclude (typeof(GridView), "GridView.js", url);
2059                                 }
2060
2061                                 string cgrid = ClientID + "_data";
2062                                 string script = string.Format ("var {0} = new Object ();\n", cgrid);
2063                                 script += string.Format ("{0}.pageIndex = {1};\n", cgrid, ClientScriptManager.GetScriptLiteral (PageIndex));
2064                                 script += string.Format ("{0}.sortExp = {1};\n", cgrid, ClientScriptManager.GetScriptLiteral (SortExpression == null ? "" : SortExpression));
2065                                 script += string.Format ("{0}.sortDir = {1};\n", cgrid, ClientScriptManager.GetScriptLiteral ((int) SortDirection));
2066                                 script += string.Format ("{0}.uid = {1};\n", cgrid, ClientScriptManager.GetScriptLiteral (UniqueID));
2067                                 Page.ClientScript.RegisterStartupScript (typeof(TreeView), this.UniqueID, script, true);
2068
2069                                 // Make sure the basic script infrastructure is rendered
2070                                 Page.ClientScript.GetCallbackEventReference (this, "null", "", "null");
2071                                 Page.ClientScript.GetPostBackClientHyperlink (this, "");
2072                         }
2073                 }
2074
2075                 protected internal override void Render (HtmlTextWriter writer)
2076                 {
2077                         PrepareControlHierarchy ();
2078
2079                         if (EnableSortingAndPagingCallbacks)
2080                                 writer.AddAttribute (HtmlTextWriterAttribute.Id, ClientID + "_div");
2081                         writer.RenderBeginTag (HtmlTextWriterTag.Div);
2082
2083                         RenderGrid (writer);
2084
2085                         writer.RenderEndTag ();
2086                 }
2087
2088                 void RenderGrid (HtmlTextWriter writer)
2089                 {
2090                         if (table == null)
2091                                 return;
2092
2093                         table.Render (writer);
2094                 }
2095
2096                 PostBackOptions IPostBackContainer.GetPostBackOptions (IButtonControl control)
2097                 {
2098                         if (control == null)
2099                                 throw new ArgumentNullException ("control");
2100
2101                         if (control.CausesValidation)
2102                                 throw new InvalidOperationException ("A button that causes validation in GridView '" + ID + "' is attempting to use the container GridView as the post back target.  The button should either turn off validation or use itself as the post back container.");
2103
2104                         PostBackOptions options = new PostBackOptions (this);
2105                         options.Argument = control.CommandName + "$" + control.CommandArgument;
2106                         options.RequiresJavaScriptProtocol = true;
2107
2108                         return options;
2109                 }
2110         }
2111 }
2112
2113 #endif