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