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                 DataKeyArray keys;
  78                 DataKey oldEditValues;
  79                 AutoGeneratedFieldProperties[] autoFieldProperties;
  80                 string [] dataKeyNames = null;
  81                 readonly string[] emptyKeys = new string[0];
  82
  83                 private static readonly object PageIndexChangedEvent = new object();
  84                 private static readonly object PageIndexChangingEvent = new object();
  85                 private static readonly object RowCancelingEditEvent = new object();
  86                 private static readonly object RowCommandEvent = new object();
  87                 private static readonly object RowCreatedEvent = new object();
  88                 private static readonly object RowDataBoundEvent = new object();
  89                 private static readonly object RowDeletedEvent = new object();
  90                 private static readonly object RowDeletingEvent = new object();
  91                 private static readonly object RowEditingEvent = new object();
  92                 private static readonly object RowUpdatedEvent = new object();
  93                 private static readonly object RowUpdatingEvent = new object();
  94                 private static readonly object SelectedIndexChangedEvent = new object();
  95                 private static readonly object SelectedIndexChangingEvent = new object();
  96                 private static readonly object SortedEvent = new object();
  97                 private static readonly object SortingEvent = new object();
  98
  99                 // Control state
 100                 int pageIndex;
 101                 int pageCount = 0;
 102                 int selectedIndex = -1;
 103                 int editIndex = -1;
 104                 SortDirection sortDirection = SortDirection.Ascending;
 105                 string sortExpression = string.Empty;
 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                 [BrowsableAttribute (false)]
 523                 [DesignerSerializationVisibilityAttribute (DesignerSerializationVisibility.Hidden)]
 524                 public virtual DataKeyArray DataKeys {
 525                         get {
 526                                 EnsureDataBound ();
 527                                 return keys;
 528                         }
 529                 }
 530
 531                 [WebCategoryAttribute ("Misc")]
 532                 [DefaultValueAttribute (-1)]
 533                 public virtual int EditIndex {
 534                         get {
 535                                 return editIndex;
 536                         }
 537                         set {
 538                                 editIndex = value;
 539                                 RequireBinding ();
 540                         }
 541                 }
 542
 543                 [WebCategoryAttribute ("Styles")]
 544                 [PersistenceMode (PersistenceMode.InnerProperty)]
 545                 [NotifyParentProperty (true)]
 546                 [DesignerSerializationVisibility (DesignerSerializationVisibility.Content)]
 547                 public TableItemStyle EditRowStyle {
 548                         get {
 549                                 if (editRowStyle == null) {
 550                                         editRowStyle = new TableItemStyle ();
 551                                         if (IsTrackingViewState)
 552                                                 editRowStyle.TrackViewState();
 553                                 }
 554                                 return editRowStyle;
 555                         }
 556                 }
 557
 558                 [WebCategoryAttribute ("Styles")]
 559                 [PersistenceMode (PersistenceMode.InnerProperty)]
 560                 [NotifyParentProperty (true)]
 561                 [DesignerSerializationVisibility (DesignerSerializationVisibility.Content)]
 562                 public TableItemStyle EmptyDataRowStyle {
 563                         get {
 564                                 if (emptyDataRowStyle == null) {
 565                                         emptyDataRowStyle = new TableItemStyle ();
 566                                         if (IsTrackingViewState)
 567                                                 emptyDataRowStyle.TrackViewState();
 568                                 }
 569                                 return emptyDataRowStyle;
 570                         }
 571                 }
 572
 573                 [DefaultValue (null)]
 574                 [TemplateContainer (typeof(GridViewRow), BindingDirection.OneWay)]
 575                 [PersistenceMode (PersistenceMode.InnerProperty)]
 576                 [Browsable (false)]
 577                 public virtual ITemplate EmptyDataTemplate {
 578                         get { return emptyDataTemplate; }
 579                         set { emptyDataTemplate = value; RequireBinding (); }
 580                 }
 581
 582                 [LocalizableAttribute (true)]
 583                 [WebCategoryAttribute ("Appearance")]
 584                 [DefaultValueAttribute ("")]
 585                 public virtual string EmptyDataText {
 586                         get {
 587                                 object ob = ViewState ["EmptyDataText"];
 588                                 if (ob != null) return (string) ob;
 589                                 return string.Empty;
 590                         }
 591                         set {
 592                                 ViewState ["EmptyDataText"] = value;
 593                                 RequireBinding ();
 594                         }
 595                 }
 596
 597                 [WebCategoryAttribute ("Behavior")]
 598                 [DefaultValueAttribute (false)]
 599                 public virtual bool EnableSortingAndPagingCallbacks {
 600                         get {
 601                                 object ob = ViewState ["EnableSortingAndPagingCallbacks"];
 602                                 if (ob != null) return (bool) ob;
 603                                 return false;
 604                         }
 605                         set {
 606                                 ViewState ["EnableSortingAndPagingCallbacks"] = value;
 607                                 RequireBinding ();
 608                         }
 609                 }
 610
 611                 [DesignerSerializationVisibilityAttribute (DesignerSerializationVisibility.Hidden)]
 612                 [BrowsableAttribute (false)]
 613                 public virtual GridViewRow FooterRow {
 614                         get {
 615                                 if (table != null) {
 616                                         for (int index = table.Rows.Count - 1; index >= 0; index--) {
 617                                                 GridViewRow row = (GridViewRow) table.Rows [index];
 618                                                 switch (row.RowType) {
 619                                                 case DataControlRowType.Separator:
 620                                                 case DataControlRowType.Pager:
 621                                                         continue;
 622                                                 case DataControlRowType.Footer:
 623                                                         return row;
 624                                                 default:
 625                                                         break;
 626                                                 }
 627                                         }
 628                                 }
 629                                 return null;
 630                         }
 631                 }
 632
 633                 [WebCategoryAttribute ("Styles")]
 634                 [PersistenceMode (PersistenceMode.InnerProperty)]
 635                 [NotifyParentProperty (true)]
 636                 [DefaultValue (null)]
 637                 [DesignerSerializationVisibility (DesignerSerializationVisibility.Content)]
 638                 public TableItemStyle FooterStyle {
 639                         get {
 640                                 if (footerStyle == null) {
 641                                         footerStyle = new TableItemStyle ();
 642                                         if (IsTrackingViewState)
 643                                                 footerStyle.TrackViewState();
 644                                 }
 645                                 return footerStyle;
 646                         }
 647                 }
 648
 649                 [WebCategoryAttribute ("Appearance")]
 650                 [DefaultValueAttribute (GridLines.Both)]
 651                 public virtual GridLines GridLines {
 652                         get {
 653                                 if (ControlStyleCreated)
 654                                         return ((TableStyle) ControlStyle).GridLines;
 655                                 return GridLines.Both;
 656                         }
 657                         set {
 658                                 ((TableStyle) ControlStyle).GridLines = value;
 659                         }
 660                 }
 661
 662                 [DesignerSerializationVisibilityAttribute (DesignerSerializationVisibility.Hidden)]
 663                 [BrowsableAttribute (false)]
 664                 public virtual GridViewRow HeaderRow {
 665                         get {
 666                                 if (table != null) {
 667                                         for (int index = 0, total = table.Rows.Count; index < total; index++) {
 668                                                 GridViewRow row = (GridViewRow) table.Rows [index];
 669                                                 switch (row.RowType) {
 670                                                 case DataControlRowType.Separator:
 671                                                 case DataControlRowType.Pager:
 672                                                         continue;
 673                                                 case DataControlRowType.Header:
 674                                                         return row;
 675                                                 default:
 676                                                         break;
 677                                                 }
 678                                         }
 679                                 }
 680                                 return null;
 681                         }
 682                 }
 683
 684                 [WebCategoryAttribute ("Styles")]
 685                 [PersistenceMode (PersistenceMode.InnerProperty)]
 686                 [NotifyParentProperty (true)]
 687                 [DefaultValue (null)]
 688                 [DesignerSerializationVisibility (DesignerSerializationVisibility.Content)]
 689                 public TableItemStyle HeaderStyle {
 690                         get {
 691                                 if (headerStyle == null) {
 692                                         headerStyle = new TableItemStyle ();
 693                                         if (IsTrackingViewState)
 694                                                 headerStyle.TrackViewState();
 695                                 }
 696                                 return headerStyle;
 697                         }
 698                 }
 699
 700                 [Category ("Layout")]
 701                 [DefaultValueAttribute (HorizontalAlign.NotSet)]
 702                 public virtual HorizontalAlign HorizontalAlign {
 703                         get {
 704                                 if (ControlStyleCreated)
 705                                         return ((TableStyle) ControlStyle).HorizontalAlign;
 706                                 return HorizontalAlign.NotSet;
 707                         }
 708                         set {
 709                                 ((TableStyle) ControlStyle).HorizontalAlign = value;
 710                         }
 711                 }
 712
 713                 [BrowsableAttribute (false)]
 714                 [DesignerSerializationVisibilityAttribute (DesignerSerializationVisibility.Hidden)]
 715                 public virtual int PageCount {
 716                         get {
 717                                 if (pageCount != 0) return pageCount;
 718                                 EnsureDataBound ();
 719                                 return pageCount;
 720                         }
 721                 }
 722
 723                 [WebCategoryAttribute ("Paging")]
 724                 [BrowsableAttribute (true)]
 725                 [DefaultValueAttribute (0)]
 726                 public virtual int PageIndex {
 727                         get {
 728                                 return pageIndex;
 729                         }
 730                         set {
 731                                 pageIndex = value;
 732                                 RequireBinding ();
 733                         }
 734                 }
 735
 736                 [DefaultValueAttribute (10)]
 737                 [WebCategoryAttribute ("Paging")]
 738                 public virtual int PageSize {
 739                         get {
 740                                 object ob = ViewState ["PageSize"];
 741                                 if (ob != null) return (int) ob;
 742                                 return 10;
 743                         }
 744                         set {
 745                                 ViewState ["PageSize"] = value;
 746                                 RequireBinding ();
 747                         }
 748                 }
 749
 750                 [WebCategoryAttribute ("Paging")]
 751                 [DesignerSerializationVisibilityAttribute (DesignerSerializationVisibility.Content)]
 752                 [NotifyParentPropertyAttribute (true)]
 753                 [PersistenceModeAttribute (PersistenceMode.InnerProperty)]
 754                 public virtual PagerSettings PagerSettings {
 755                         get {
 756                                 if (pagerSettings == null) {
 757                                         pagerSettings = new PagerSettings (this);
 758                                         if (IsTrackingViewState)
 759                                                 ((IStateManager)pagerSettings).TrackViewState ();
 760                                 }
 761                                 return pagerSettings;
 762                         }
 763                 }
 764
 765                 [WebCategoryAttribute ("Styles")]
 766                 [PersistenceMode (PersistenceMode.InnerProperty)]
 767                 [NotifyParentProperty (true)]
 768                 [DesignerSerializationVisibility (DesignerSerializationVisibility.Content)]
 769                 public TableItemStyle PagerStyle {
 770                         get {
 771                                 if (pagerStyle == null) {
 772                                         pagerStyle = new TableItemStyle ();
 773                                         if (IsTrackingViewState)
 774                                                 pagerStyle.TrackViewState();
 775                                 }
 776                                 return pagerStyle;
 777                         }
 778                 }
 779
 780
 781                 [DefaultValue (null)]
 782                 /* DataControlPagerCell isnt specified in the docs */
 783                 //[TemplateContainer (typeof(DataControlPagerCell), BindingDirection.OneWay)]
 784                 [PersistenceMode (PersistenceMode.InnerProperty)]
 785                 [Browsable (false)]
 786                 public virtual ITemplate PagerTemplate {
 787                         get { return pagerTemplate; }
 788                         set { pagerTemplate = value; RequireBinding (); }
 789                 }
 790
 791                 [DefaultValueAttribute ("")]
 792                 [WebCategoryAttribute ("Accessibility")]
 793                 //              [TypeConverterAttribute (typeof(System.Web.UI.Design.DataColumnSelectionConverter)]
 794                 public virtual string RowHeaderColumn {
 795                         get {
 796                                 object ob = ViewState ["RowHeaderColumn"];
 797                                 if (ob != null) return (string) ob;
 798                                 return string.Empty;
 799                         }
 800                         set {
 801                                 ViewState ["RowHeaderColumn"] = value;
 802                                 RequireBinding ();
 803                         }
 804                 }
 805
 806                 [DesignerSerializationVisibilityAttribute (DesignerSerializationVisibility.Hidden)]
 807                 [BrowsableAttribute (false)]
 808                 public virtual GridViewRowCollection Rows {
 809                         get {
 810                                 EnsureDataBound ();
 811                                 return rows;
 812                         }
 813                 }
 814
 815                 [WebCategoryAttribute ("Styles")]
 816                 [PersistenceMode (PersistenceMode.InnerProperty)]
 817                 [NotifyParentProperty (true)]
 818                 [DesignerSerializationVisibility (DesignerSerializationVisibility.Content)]
 819                 public TableItemStyle RowStyle {
 820                         get {
 821                                 if (rowStyle == null) {
 822                                         rowStyle = new TableItemStyle ();
 823                                         if (IsTrackingViewState)
 824                                                 rowStyle.TrackViewState();
 825                                 }
 826                                 return rowStyle;
 827                         }
 828                 }
 829
 830                 [BrowsableAttribute (false)]
 831                 [DesignerSerializationVisibilityAttribute (DesignerSerializationVisibility.Hidden)]
 832                 public virtual DataKey SelectedDataKey {
 833                         get {
 834                                 if (DataKeys == null)
 835                                         throw new InvalidOperationException ("DataKeys");
 836
 837                                 if (selectedIndex >= 0 && selectedIndex < DataKeys.Count) {
 838                                         return DataKeys [selectedIndex];
 839                                 } else
 840                                         return null;
 841                         }
 842                 }
 843
 844                 [BindableAttribute (true)]
 845                 [DefaultValueAttribute (-1)]
 846                 public virtual int SelectedIndex {
 847                         get {
 848                                 return selectedIndex;
 849                         }
 850                         set {
 851                                 if (Rows != null && selectedIndex >= 0 && selectedIndex < Rows.Count) {
 852                                         int oldIndex = selectedIndex;
 853                                         selectedIndex = -1;
 854                                         Rows [oldIndex].RowState = GetRowState (oldIndex);
 855                                 }
 856                                 selectedIndex = value;
 857                                 if (Rows != null && selectedIndex >= 0 && selectedIndex < Rows.Count) {
 858                                         Rows [selectedIndex].RowState = GetRowState (selectedIndex);
 859                                 }
 860                         }
 861                 }
 862
 863                 [BrowsableAttribute (false)]
 864                 [DesignerSerializationVisibilityAttribute (DesignerSerializationVisibility.Hidden)]
 865                 public virtual GridViewRow SelectedRow {
 866                         get {
 867                                 if (selectedIndex >= 0 && selectedIndex < Rows.Count) {
 868                                         return Rows [selectedIndex];
 869                                 } else
 870                                         return null;
 871                         }
 872                 }
 873
 874                 [WebCategoryAttribute ("Styles")]
 875                 [PersistenceMode (PersistenceMode.InnerProperty)]
 876                 [NotifyParentProperty (true)]
 877                 [DesignerSerializationVisibility (DesignerSerializationVisibility.Content)]
 878                 public TableItemStyle SelectedRowStyle {
 879                         get {
 880                                 if (selectedRowStyle == null) {
 881                                         selectedRowStyle = new TableItemStyle ();
 882                                         if (IsTrackingViewState)
 883                                                 selectedRowStyle.TrackViewState();
 884                                 }
 885                                 return selectedRowStyle;
 886                         }
 887                 }
 888
 889                 [BrowsableAttribute (false)]
 890                 public object SelectedValue {
 891                         get {
 892                                 if (SelectedDataKey != null)
 893                                         return SelectedDataKey.Value;
 894                                 else
 895                                         return null;
 896                         }
 897                 }
 898
 899                 [WebCategoryAttribute ("Appearance")]
 900                 [DefaultValueAttribute (false)]
 901                 public virtual bool ShowFooter {
 902                         get {
 903                                 object ob = ViewState ["ShowFooter"];
 904                                 if (ob != null) return (bool) ob;
 905                                 return false;
 906                         }
 907                         set {
 908                                 ViewState ["ShowFooter"] = value;
 909                                 RequireBinding ();
 910                         }
 911                 }
 912
 913                 [WebCategoryAttribute ("Appearance")]
 914                 [DefaultValueAttribute (true)]
 915                 public virtual bool ShowHeader {
 916                         get {
 917                                 object ob = ViewState ["ShowHeader"];
 918                                 if (ob != null) return (bool) ob;
 919                                 return true;
 920                         }
 921                         set {
 922                                 ViewState ["ShowHeader"] = value;
 923                                 RequireBinding ();
 924                         }
 925                 }
 926
 927                 [PersistenceModeAttribute (PersistenceMode.InnerProperty)]
 928                 [BrowsableAttribute (false)]
 929                 [DefaultValueAttribute (SortDirection.Ascending)]
 930                 [DesignerSerializationVisibilityAttribute (DesignerSerializationVisibility.Hidden)]
 931                 public virtual SortDirection SortDirection {
 932                         get { return IsBoundUsingDataSourceID ? sortDirection : SortDirection.Ascending; }
 933                 }
 934
 935                 [BrowsableAttribute (false)]
 936                 [DesignerSerializationVisibilityAttribute (DesignerSerializationVisibility.Hidden)]
 937                 public virtual string SortExpression {
 938                         get { return IsBoundUsingDataSourceID ? sortExpression : String.Empty; }
 939                 }
 940
 941                 [DesignerSerializationVisibilityAttribute (DesignerSerializationVisibility.Hidden)]
 942                 [BrowsableAttribute (false)]
 943                 public virtual GridViewRow TopPagerRow {
 944                         get {
 945                                 EnsureDataBound ();
 946                                 return topPagerRow;
 947                         }
 948                 }
 949
 950                 [WebCategoryAttribute ("Accessibility")]
 951                 [DefaultValueAttribute (true)]
 952                 public virtual bool UseAccessibleHeader {
 953                         get {
 954                                 object ob = ViewState ["UseAccessibleHeader"];
 955                                 if (ob != null) return (bool) ob;
 956                                 return true;
 957                         }
 958                         set {
 959                                 ViewState ["UseAccessibleHeader"] = value;
 960                                 RequireBinding ();
 961                         }
 962                 }
 963
 964                 public virtual bool IsBindableType (Type type)
 965                 {
 966                         return type.IsPrimitive || type == typeof(string) || type == typeof(DateTime) || type == typeof(Guid);
 967                 }
 968
 969                 // MSDN: The CreateDataSourceSelectArguments method is a helper method called by
 970                 // the GridView control to create the DataSourceSelectArguments object that
 971                 // contains the arguments passed to the data source. In this implementation,
 972                 // the DataSourceSelectArguments object contains the arguments for paging operations.
 973                 protected override DataSourceSelectArguments CreateDataSourceSelectArguments ()
 974                 {
 975                         DataSourceSelectArguments arg = DataSourceSelectArguments.Empty;
 976                         DataSourceView view= GetData();
 977                         if (AllowPaging && view.CanPage) {
 978                                 arg.StartRowIndex = PageIndex * PageSize;
 979                                 if (view.CanRetrieveTotalRowCount) {
 980                                         arg.RetrieveTotalRowCount = true;
 981                                         arg.MaximumRows = PageSize;
 982                                 }
 983                                 else {
 984                                         arg.MaximumRows = -1;
 985                                 }
 986                         }
 987
 988                         if (IsBoundUsingDataSourceID && !String.IsNullOrEmpty (sortExpression)) {
 989                                 if (sortDirection == SortDirection.Ascending)
 990                                         arg.SortExpression = sortExpression;
 991                                 else
 992                                         arg.SortExpression = sortExpression + " DESC";
 993                         }
 994
 995                         return arg;
 996                 }
 997
 998                 protected virtual ICollection CreateColumns (PagedDataSource dataSource, bool useDataSource)
 999                 {
1000                         ArrayList fields = new ArrayList ();
1001
1002                         if (AutoGenerateEditButton || AutoGenerateDeleteButton || AutoGenerateSelectButton) {
1003                                 CommandField field = new CommandField ();
1004                                 field.ShowEditButton = AutoGenerateEditButton;
1005                                 field.ShowDeleteButton = AutoGenerateDeleteButton;
1006                                 field.ShowSelectButton = AutoGenerateSelectButton;
1007                                 fields.Add (field);
1008                         }
1009
1010                         fields.AddRange (Columns);
1011
1012                         if (AutoGenerateColumns) {
1013                                 if (useDataSource)
1014                                         autoFieldProperties = CreateAutoFieldProperties (dataSource);
1015
1016                                 if (autoFieldProperties != null) {
1017                                         foreach (AutoGeneratedFieldProperties props in autoFieldProperties)
1018                                                 fields.Add (CreateAutoGeneratedColumn (props));
1019                                 }
1020                         }
1021
1022                         return fields;
1023                 }
1024
1025                 protected virtual AutoGeneratedField CreateAutoGeneratedColumn (AutoGeneratedFieldProperties fieldProperties)
1026                 {
1027                         return new AutoGeneratedField (fieldProperties);
1028                 }
1029
1030                 AutoGeneratedFieldProperties[] CreateAutoFieldProperties (PagedDataSource source)
1031                 {
1032                         if(source == null) return null;
1033
1034                         PropertyDescriptorCollection props = source.GetItemProperties (new PropertyDescriptor[0]);
1035                         Type prop_type;
1036
1037                         ArrayList retVal = new ArrayList();
1038
1039                         if (props == null)
1040                         {
1041                                 object fitem = null;
1042                                 prop_type = null;
1043                                 PropertyInfo prop_item =  source.DataSource.GetType().GetProperty("Item",
1044                                                                                                   BindingFlags.Instance | BindingFlags.Static |
1045                                                                                                   BindingFlags.Public, null, null,
1046                                                                                                   new Type[] { typeof(int) }, null);
1047
1048                                 if (prop_item != null) {
1049                                         prop_type = prop_item.PropertyType;
1050                                 }
1051
1052                                 if (prop_type == null || prop_type == typeof(object)) {
1053                                         IEnumerator en = source.GetEnumerator();
1054                                         if (en.MoveNext())
1055                                                 fitem = en.Current;
1056                                         if (fitem != null)
1057                                                 prop_type = fitem.GetType();
1058                                 }
1059
1060                                 if (fitem != null && fitem is ICustomTypeDescriptor) {
1061                                         props = TypeDescriptor.GetProperties(fitem);
1062                                 } else if (prop_type != null) {
1063                                         if (IsBindableType (prop_type)) {
1064                                                 AutoGeneratedFieldProperties field = new AutoGeneratedFieldProperties ();
1065                                                 ((IStateManager)field).TrackViewState();
1066                                                 field.Name = "Item";
1067                                                 field.DataField = BoundField.ThisExpression;
1068                                                 field.Type = prop_type;
1069                                                 retVal.Add (field);
1070                                         } else {
1071                                                 props = TypeDescriptor.GetProperties (prop_type);
1072                                         }
1073                                 }
1074                         }
1075
1076                         if (props != null && props.Count > 0)
1077                         {
1078                                 foreach (PropertyDescriptor current in props) {
1079                                         if (IsBindableType (current.PropertyType)) {
1080                                                 AutoGeneratedFieldProperties field = new AutoGeneratedFieldProperties ();
1081                                                 ((IStateManager)field).TrackViewState();
1082                                                 field.Name = current.Name;
1083                                                 field.DataField = current.Name;
1084                                                 field.IsReadOnly = current.IsReadOnly;
1085                                                 field.Type = current.PropertyType;
1086                                                 retVal.Add (field);
1087                                         }
1088                                 }
1089                         }
1090
1091                         if (retVal.Count > 0)
1092                                 return (AutoGeneratedFieldProperties[]) retVal.ToArray (typeof(AutoGeneratedFieldProperties));
1093                         else
1094                                 return new AutoGeneratedFieldProperties [0];
1095                 }
1096
1097                 protected virtual GridViewRow CreateRow (int rowIndex, int dataSourceIndex, DataControlRowType rowType, DataControlRowState rowState)
1098                 {
1099                         GridViewRow row = new GridViewRow (rowIndex, dataSourceIndex, rowType, rowState);
1100                         OnRowCreated (new GridViewRowEventArgs (row));
1101                         return row;
1102                 }
1103
1104                 void RequireBinding ()
1105                 {
1106                         if (Initialized) {
1107                                 RequiresDataBinding = true;
1108                                 pageCount = -1;
1109                         }
1110                 }
1111
1112                 protected virtual Table CreateChildTable ()
1113                 {
1114                         return new ContainedTable (this);
1115                 }
1116
1117                 protected override int CreateChildControls (IEnumerable data, bool dataBinding)
1118                 {
1119                         PagedDataSource dataSource;
1120
1121                         if (dataBinding) {
1122                                 DataSourceView view = GetData ();
1123                                 dataSource = new PagedDataSource ();
1124                                 dataSource.DataSource = data;
1125
1126                                 if (AllowPaging) {
1127                                         dataSource.AllowPaging = true;
1128                                         dataSource.PageSize = PageSize;
1129                                         dataSource.CurrentPageIndex = PageIndex;
1130                                         if (view.CanPage) {
1131                                                 dataSource.AllowServerPaging = true;
1132                                                 if (view.CanRetrieveTotalRowCount)
1133                                                         dataSource.VirtualCount = SelectArguments.TotalRowCount;
1134                                         }
1135                                 }
1136
1137                                 pageCount = dataSource.PageCount;
1138                         }
1139                         else
1140                         {
1141                                 dataSource = new PagedDataSource ();
1142                                 dataSource.DataSource = data;
1143                                 if (AllowPaging) {
1144                                         dataSource.AllowPaging = true;
1145                                         dataSource.PageSize = PageSize;
1146                                         dataSource.CurrentPageIndex = PageIndex;
1147                                 }
1148                         }
1149
1150                         bool showPager = AllowPaging && (PageCount > 1);
1151
1152                         Controls.Clear ();
1153                         table = CreateChildTable ();
1154                         Controls.Add (table);
1155
1156                         ArrayList list = new ArrayList ();
1157                         ArrayList keyList = new ArrayList ();
1158
1159                         // Creates the set of fields to show
1160
1161                         ICollection fieldCollection = CreateColumns (dataSource, dataBinding);
1162                         DataControlField[] fields = new DataControlField [fieldCollection.Count];
1163                         fieldCollection.CopyTo (fields, 0);
1164
1165                         foreach (DataControlField field in fields) {
1166                                 field.Initialize (AllowSorting, this);
1167                                 if (EnableSortingAndPagingCallbacks)
1168                                         field.ValidateSupportsCallback ();
1169                         }
1170
1171                         // Main table creation
1172
1173                         if (showPager && PagerSettings.Position == PagerPosition.Top || PagerSettings.Position == PagerPosition.TopAndBottom) {
1174                                 topPagerRow = CreatePagerRow (fields.Length, dataSource);
1175                                 table.Rows.Add (topPagerRow);
1176                         }
1177
1178                         GridViewRow headerRow = CreateRow (0, 0, DataControlRowType.Header, DataControlRowState.Normal);
1179                         table.Rows.Add (headerRow);
1180                         InitializeRow (headerRow, fields);
1181
1182                         foreach (object obj in dataSource) {
1183                                 DataControlRowState rstate = GetRowState (list.Count);
1184                                 GridViewRow row = CreateRow (list.Count, list.Count, DataControlRowType.DataRow, rstate);
1185                                 row.DataItem = obj;
1186                                 list.Add (row);
1187                                 table.Rows.Add (row);
1188                                 InitializeRow (row, fields);
1189                                 if (dataBinding) {
1190                                         row.DataBind ();
1191                                         OnRowDataBound (new GridViewRowEventArgs (row));
1192                                         if (EditIndex == row.RowIndex)
1193                                                 oldEditValues = new DataKey (GetRowValues (row, false, true));
1194                                         keyList.Add (new DataKey (CreateRowDataKey (row), DataKeyNames));
1195                                 } else {
1196                                         if (EditIndex == row.RowIndex)
1197                                                 oldEditValues = new DataKey (new OrderedDictionary ());
1198                                         keyList.Add (new DataKey (new OrderedDictionary (), DataKeyNames));
1199                                 }
1200
1201                                 if (list.Count >= PageSize)
1202                                         break;
1203                         }
1204
1205                         if (list.Count == 0)
1206                                 table.Rows.Add (CreateEmptyrRow (fields.Length));
1207
1208                         GridViewRow footerRow = CreateRow (0, 0, DataControlRowType.Footer, DataControlRowState.Normal);
1209                         table.Rows.Add (footerRow);
1210                         InitializeRow (footerRow, fields);
1211
1212                         if (showPager && PagerSettings.Position == PagerPosition.Bottom || PagerSettings.Position == PagerPosition.TopAndBottom) {
1213                                 bottomPagerRow = CreatePagerRow (fields.Length, dataSource);
1214                                 table.Rows.Add (bottomPagerRow);
1215                         }
1216
1217                         rows = new GridViewRowCollection (list);
1218                         keys = new DataKeyArray (keyList);
1219
1220                         return dataSource.DataSourceCount;
1221                 }
1222
1223                 protected override Style CreateControlStyle ()
1224                 {
1225                         TableStyle style = new TableStyle (ViewState);
1226                         style.GridLines = GridLines.Both;
1227                         style.CellSpacing = 0;
1228                         return style;
1229                 }
1230
1231                 DataControlRowState GetRowState (int index)
1232                 {
1233                         DataControlRowState rstate = (index % 2) == 0 ? DataControlRowState.Normal : DataControlRowState.Alternate;
1234                         if (index == SelectedIndex) rstate |= DataControlRowState.Selected;
1235                         if (index == EditIndex) rstate |= DataControlRowState.Edit;
1236                         return rstate;
1237                 }
1238
1239                 GridViewRow CreatePagerRow (int fieldCount, PagedDataSource dataSource)
1240                 {
1241                         GridViewRow row = CreateRow (-1, -1, DataControlRowType.Pager, DataControlRowState.Normal);
1242                         InitializePager (row, fieldCount, dataSource);
1243                         return row;
1244                 }
1245
1246                 protected virtual void InitializePager (GridViewRow row, int columnSpan, PagedDataSource dataSource)
1247                 {
1248                         TableCell cell = new TableCell ();
1249                         if (columnSpan > 1)
1250                                 cell.ColumnSpan = columnSpan;
1251
1252                         if (pagerTemplate != null)
1253                                 pagerTemplate.InstantiateIn (cell);
1254                         else
1255                                 cell.Controls.Add (PagerSettings.CreatePagerControl (dataSource.CurrentPageIndex, dataSource.PageCount));
1256
1257                         row.Cells.Add (cell);
1258                 }
1259
1260                 GridViewRow CreateEmptyrRow (int fieldCount)
1261                 {
1262                         GridViewRow row = CreateRow (-1, -1, DataControlRowType.EmptyDataRow, DataControlRowState.Normal);
1263                         TableCell cell = new TableCell ();
1264                         cell.ColumnSpan = fieldCount;
1265
1266                         if (emptyDataTemplate != null)
1267                                 emptyDataTemplate.InstantiateIn (cell);
1268                         else
1269                                 cell.Text = EmptyDataText;
1270
1271                         row.Cells.Add (cell);
1272                         return row;
1273                 }
1274
1275                 protected virtual void InitializeRow (GridViewRow row, DataControlField[] fields)
1276                 {
1277                         DataControlCellType ctype;
1278                         bool accessibleHeader = false;
1279
1280                         switch (row.RowType) {
1281                         case DataControlRowType.Header:
1282                                 ctype = DataControlCellType.Header;
1283                                 accessibleHeader = UseAccessibleHeader;
1284                                 break;
1285                         case DataControlRowType.Footer:
1286                                 ctype = DataControlCellType.Footer;
1287                                 break;
1288                         default:
1289                                 ctype = DataControlCellType.DataCell;
1290                                 break;
1291                         }
1292
1293                         for (int n=0; n<fields.Length; n++) {
1294                                 DataControlField field = fields [n];
1295                                 DataControlFieldCell cell;
1296                                 if (((field is BoundField) && ((BoundField)field).DataField == RowHeaderColumn) || accessibleHeader)
1297                                         cell = new DataControlFieldHeaderCell (field, accessibleHeader ? TableHeaderScope.Column : TableHeaderScope.Row);
1298                                 else
1299                                         cell = new DataControlFieldCell (field);
1300                                 row.Cells.Add (cell);
1301                                 field.InitializeCell (cell, ctype, row.RowState, row.RowIndex);
1302                         }
1303                 }
1304
1305                 IOrderedDictionary CreateRowDataKey (GridViewRow row)
1306                 {
1307                         if (cachedKeyProperties == null) {
1308                                 PropertyDescriptorCollection props = TypeDescriptor.GetProperties (row.DataItem);
1309                                 cachedKeyProperties = new PropertyDescriptor [DataKeyNames.Length];
1310                                 for (int n=0; n<DataKeyNames.Length; n++) {
1311                                         PropertyDescriptor p = props [DataKeyNames[n]];
1312                                         if (p == null)
1313                                                 new InvalidOperationException ("Property '" + DataKeyNames[n] + "' not found in object of type " + row.DataItem.GetType());
1314                                         cachedKeyProperties [n] = p;
1315                                 }
1316                         }
1317
1318                         OrderedDictionary dic = new OrderedDictionary ();
1319                         foreach (PropertyDescriptor p in cachedKeyProperties)
1320                                 dic [p.Name] = p.GetValue (row.DataItem);
1321                         return dic;
1322                 }
1323
1324                 IOrderedDictionary GetRowValues (GridViewRow row, bool includeReadOnlyFields, bool includePrimaryKey)
1325                 {
1326                         OrderedDictionary dic = new OrderedDictionary ();
1327                         ExtractRowValues (dic, row, includeReadOnlyFields, includePrimaryKey);
1328                         return dic;
1329                 }
1330
1331                 protected virtual void ExtractRowValues (IOrderedDictionary fieldValues, GridViewRow row, bool includeReadOnlyFields, bool includePrimaryKey)
1332                 {
1333                         foreach (TableCell cell in row.Cells) {
1334                                 DataControlFieldCell c = cell as DataControlFieldCell;
1335                                 if (c != null)
1336                                         c.ContainingField.ExtractValuesFromCell (fieldValues, c, row.RowState, includeReadOnlyFields);
1337                         }
1338                         if (!includePrimaryKey && DataKeyNames != null)
1339                                 foreach (string key in DataKeyNames)
1340                                         fieldValues.Remove (key);
1341                 }
1342
1343                 protected override HtmlTextWriterTag TagKey {
1344                         get {
1345                                 if (EnableSortingAndPagingCallbacks)
1346                                         return HtmlTextWriterTag.Div;
1347                                 else
1348                                         return HtmlTextWriterTag.Table;
1349                         }
1350                 }
1351
1352                 public sealed override void DataBind ()
1353                 {
1354                         cachedKeyProperties = null;
1355                         base.DataBind ();
1356                 }
1357
1358                 protected internal override void PerformDataBinding (IEnumerable data)
1359                 {
1360                         base.PerformDataBinding (data);
1361                 }
1362
1363                 protected internal virtual void PrepareControlHierarchy ()
1364                 {
1365                         if (table == null)
1366                                 return;
1367
1368                         table.Caption = Caption;
1369                         table.CaptionAlign = CaptionAlign;
1370
1371                         foreach (GridViewRow row in table.Rows) {
1372                                 switch (row.RowType) {
1373                                 case DataControlRowType.Header:
1374                                         if (headerStyle != null && !headerStyle.IsEmpty)
1375                                                 row.ControlStyle.CopyFrom(headerStyle);
1376                                         row.Visible = ShowHeader;
1377                                         break;
1378                                 case DataControlRowType.Footer:
1379                                         if (footerStyle != null && !footerStyle.IsEmpty)
1380                                                 row.ControlStyle.CopyFrom (footerStyle);
1381                                         row.Visible = ShowFooter;
1382                                         break;
1383                                 case DataControlRowType.Pager:
1384                                         if (pagerStyle != null && !pagerStyle.IsEmpty)
1385                                                 row.ControlStyle.CopyFrom (pagerStyle);
1386                                         break;
1387                                 case DataControlRowType.EmptyDataRow:
1388                                         if (emptyDataRowStyle != null && !emptyDataRowStyle.IsEmpty)
1389                                                 row.ControlStyle.CopyFrom (emptyDataRowStyle);
1390                                         break;
1391                                 case DataControlRowType.DataRow:
1392                                         if (rowStyle != null && !rowStyle.IsEmpty)
1393                                                 row.ControlStyle.CopyFrom (rowStyle);
1394                                         if ((row.RowState & DataControlRowState.Alternate) != 0 && alternatingRowStyle != null && !alternatingRowStyle.IsEmpty)
1395                                                 row.ControlStyle.CopyFrom (alternatingRowStyle);
1396                                         if ((row.RowState & DataControlRowState.Selected) != 0 && selectedRowStyle != null && !selectedRowStyle.IsEmpty)
1397                                                 row.ControlStyle.CopyFrom (selectedRowStyle);
1398                                         if ((row.RowState & DataControlRowState.Edit) != 0 && editRowStyle != null && !editRowStyle.IsEmpty)
1399                                                 row.ControlStyle.CopyFrom (editRowStyle);
1400                                         break;
1401                                 default:
1402                                         break;
1403                                 }
1404
1405                                 foreach (TableCell cell in row.Cells) {
1406                                         DataControlFieldCell fcell = cell as DataControlFieldCell;
1407                                         if (fcell != null) {
1408                                                 DataControlField field = fcell.ContainingField;
1409                                                 switch (row.RowType) {
1410                                                 case DataControlRowType.Header:
1411                                                         if (field.HeaderStyleCreated && !field.HeaderStyle.IsEmpty)
1412                                                                 cell.ControlStyle.CopyFrom (field.HeaderStyle);
1413                                                         break;
1414                                                 case DataControlRowType.Footer:
1415                                                         if (field.FooterStyleCreated && !field.FooterStyle.IsEmpty)
1416                                                                 cell.ControlStyle.CopyFrom (field.FooterStyle);
1417                                                         break;
1418                                                 default:
1419                                                         if (field.ControlStyleCreated && !field.ControlStyle.IsEmpty)
1420                                                                 foreach (Control c in cell.Controls) {
1421                                                                         WebControl wc = c as WebControl;
1422                                                                         if (wc != null)
1423                                                                                 wc.ControlStyle.MergeWith (field.ControlStyle);
1424                                                                 }
1425                                                         if (field.ItemStyleCreated && !field.ItemStyle.IsEmpty)
1426                                                                 cell.ControlStyle.CopyFrom (field.ItemStyle);
1427                                                         break;
1428                                                 }
1429                                         }
1430                                 }
1431                         }
1432                 }
1433
1434                 protected internal override void OnInit (EventArgs e)
1435                 {
1436                         Page.RegisterRequiresControlState (this);
1437                         base.OnInit (e);
1438                 }
1439
1440                 void OnFieldsChanged (object sender, EventArgs args)
1441                 {
1442                         RequireBinding ();
1443                 }
1444
1445                 protected override void OnDataPropertyChanged ()
1446                 {
1447                         base.OnDataPropertyChanged ();
1448                         RequireBinding ();
1449                 }
1450
1451                 protected override void OnDataSourceViewChanged (object sender, EventArgs e)
1452                 {
1453                         base.OnDataSourceViewChanged (sender, e);
1454                         RequireBinding ();
1455                 }
1456
1457                 protected override bool OnBubbleEvent (object source, EventArgs e)
1458                 {
1459                         GridViewCommandEventArgs args = e as GridViewCommandEventArgs;
1460                         if (args != null) {
1461                                 OnRowCommand (args);
1462                                 string param = args.CommandArgument as string;
1463                                 if (param == null || param.Length == 0) {
1464                                         GridViewRow row = args.Row;
1465                                         if (row != null)
1466                                                 param = row.RowIndex.ToString();
1467                                 }
1468                                 ProcessEvent (args.CommandName, param);
1469                         }
1470                         return base.OnBubbleEvent (source, e);
1471                 }
1472
1473                 void IPostBackEventHandler.RaisePostBackEvent (string eventArgument)
1474                 {
1475                         RaisePostBackEvent (eventArgument);
1476                 }
1477
1478                 // This is prolly obsolete
1479                 protected virtual void RaisePostBackEvent (string eventArgument)
1480                 {
1481                         int i = eventArgument.IndexOf ('$');
1482                         if (i != -1)
1483                                 ProcessEvent (eventArgument.Substring (0, i), eventArgument.Substring (i + 1));
1484                         else
1485                                 ProcessEvent (eventArgument, null);
1486                 }
1487
1488                 void ProcessEvent (string eventName, string param)
1489                 {
1490                         switch (eventName)
1491                         {
1492                         case DataControlCommands.PageCommandName:
1493                                 int newIndex = -1;
1494                                 switch (param) {
1495                                 case DataControlCommands.FirstPageCommandArgument:
1496                                         newIndex = 0;
1497                                         break;
1498                                 case DataControlCommands.LastPageCommandArgument:
1499                                         newIndex = PageCount - 1;
1500                                         break;
1501                                 case DataControlCommands.NextPageCommandArgument:
1502                                         if (PageIndex < PageCount - 1) newIndex = PageIndex + 1;
1503                                         break;
1504                                 case DataControlCommands.PreviousPageCommandArgument:
1505                                         if (PageIndex > 0) newIndex = PageIndex - 1;
1506                                         break;
1507                                 default:
1508                                         newIndex = int.Parse (param) - 1;
1509                                         break;
1510                                 }
1511                                 ShowPage (newIndex);
1512                                 break;
1513
1514                         case DataControlCommands.FirstPageCommandArgument:
1515                                 ShowPage (0);
1516                                 break;
1517
1518                         case DataControlCommands.LastPageCommandArgument:
1519                                 ShowPage (PageCount - 1);
1520                                 break;
1521
1522                         case DataControlCommands.NextPageCommandArgument:
1523                                 if (PageIndex < PageCount - 1)
1524                                         ShowPage (PageIndex + 1);
1525                                 break;
1526
1527                         case DataControlCommands.PreviousPageCommandArgument:
1528                                 if (PageIndex > 0)
1529                                         ShowPage (PageIndex - 1);
1530                                 break;
1531
1532                         case DataControlCommands.SelectCommandName:
1533                                 SelectRow (int.Parse (param));
1534                                 break;
1535
1536                         case DataControlCommands.EditCommandName:
1537                                 EditRow (int.Parse (param));
1538                                 break;
1539
1540                         case DataControlCommands.UpdateCommandName:
1541                                 UpdateRow (EditIndex, true);
1542                                 break;
1543
1544                         case DataControlCommands.CancelCommandName:
1545                                 CancelEdit ();
1546                                 break;
1547
1548                         case DataControlCommands.DeleteCommandName:
1549                                 DeleteRow (int.Parse (param));
1550                                 break;
1551
1552                         case DataControlCommands.SortCommandName:
1553                                 Sort (param);
1554                                 break;
1555                         }
1556                 }
1557
1558                 void Sort (string newSortExpression)
1559                 {
1560                         SortDirection newDirection;
1561                         if (sortExpression == newSortExpression) {
1562                                 if (sortDirection == SortDirection.Ascending)
1563                                         newDirection = SortDirection.Descending;
1564                                 else
1565                                         newDirection = SortDirection.Ascending;
1566                         } else
1567                                 newDirection = sortDirection;
1568
1569                         Sort (newSortExpression, newDirection);
1570                 }
1571
1572                 public virtual void Sort (string newSortExpression, SortDirection newSortDirection)
1573                 {
1574                         GridViewSortEventArgs args = new GridViewSortEventArgs (newSortExpression, newSortDirection);
1575                         OnSorting (args);
1576                         if (args.Cancel) return;
1577
1578                         sortExpression = args.SortExpression;
1579                         sortDirection = args.SortDirection;
1580                         RequireBinding ();
1581
1582                         OnSorted (EventArgs.Empty);
1583                 }
1584
1585                 void SelectRow (int index)
1586                 {
1587                         GridViewSelectEventArgs args = new GridViewSelectEventArgs (index);
1588                         OnSelectedIndexChanging (args);
1589                         if (!args.Cancel) {
1590                                 SelectedIndex = args.NewSelectedIndex;
1591                                 OnSelectedIndexChanged (EventArgs.Empty);
1592                         }
1593                 }
1594
1595                 void ShowPage (int newIndex)
1596                 {
1597                         GridViewPageEventArgs args = new GridViewPageEventArgs (newIndex);
1598                         OnPageIndexChanging (args);
1599                         if (!args.Cancel) {
1600                                 EndRowEdit ();
1601                                 PageIndex = args.NewPageIndex;
1602                                 OnPageIndexChanged (EventArgs.Empty);
1603                         }
1604                 }
1605
1606                 void EditRow (int index)
1607                 {
1608                         GridViewEditEventArgs args = new GridViewEditEventArgs (index);
1609                         OnRowEditing (args);
1610                         if (!args.Cancel) {
1611                                 EditIndex = args.NewEditIndex;
1612                         }
1613                 }
1614
1615                 void CancelEdit ()
1616                 {
1617                         GridViewCancelEditEventArgs args = new GridViewCancelEditEventArgs (EditIndex);
1618                         OnRowCancelingEdit (args);
1619                         if (!args.Cancel) {
1620                                 EndRowEdit ();
1621                         }
1622                 }
1623
1624                 [MonoTODO ("Support two-way binding expressions")]
1625                 public virtual void UpdateRow (int rowIndex, bool causesValidation)
1626                 {
1627                         if (causesValidation)
1628                                 Page.Validate ();
1629
1630                         if (rowIndex != EditIndex) throw new NotSupportedException ();
1631
1632                         currentEditOldValues = oldEditValues.Values;
1633
1634                         GridViewRow row = Rows [rowIndex];
1635                         currentEditRowKeys = DataKeys [rowIndex].Values;
1636                         currentEditNewValues = GetRowValues (row, false, false);
1637
1638                         GridViewUpdateEventArgs args = new GridViewUpdateEventArgs (EditIndex, currentEditRowKeys, currentEditOldValues, currentEditNewValues);
1639                         OnRowUpdating (args);
1640                         if (!args.Cancel) {
1641                                 DataSourceView view = GetData ();
1642                                 if (view == null) throw new HttpException ("The DataSourceView associated to data bound control was null");
1643                                 view.Update (currentEditRowKeys, currentEditNewValues, currentEditOldValues, new DataSourceViewOperationCallback (UpdateCallback));
1644                         } else
1645                                 EndRowEdit ();
1646                 }
1647
1648                 bool UpdateCallback (int recordsAffected, Exception exception)
1649                 {
1650                         GridViewUpdatedEventArgs dargs = new GridViewUpdatedEventArgs (recordsAffected, exception, currentEditRowKeys, currentEditOldValues, currentEditNewValues);
1651                         OnRowUpdated (dargs);
1652
1653                         if (!dargs.KeepInEditMode)
1654                                 EndRowEdit ();
1655
1656                         return dargs.ExceptionHandled;
1657                 }
1658
1659                 public virtual void DeleteRow (int rowIndex)
1660                 {
1661                         GridViewRow row = Rows [rowIndex];
1662                         currentEditRowKeys = DataKeys [rowIndex].Values;
1663                         currentEditNewValues = GetRowValues (row, true, true);
1664
1665                         GridViewDeleteEventArgs args = new GridViewDeleteEventArgs (rowIndex, currentEditRowKeys, currentEditNewValues);
1666                         OnRowDeleting (args);
1667
1668                         if (!args.Cancel) {
1669                                 RequireBinding ();
1670                                 DataSourceView view = GetData ();
1671                                 if (view != null)
1672                                         view.Delete (currentEditRowKeys, currentEditNewValues, new DataSourceViewOperationCallback (DeleteCallback));
1673                                 else {
1674                                         GridViewDeletedEventArgs dargs = new GridViewDeletedEventArgs (0, null, currentEditRowKeys, currentEditNewValues);
1675                                         OnRowDeleted (dargs);
1676                                 }
1677                         }
1678                 }
1679
1680                 bool DeleteCallback (int recordsAffected, Exception exception)
1681                 {
1682                         GridViewDeletedEventArgs dargs = new GridViewDeletedEventArgs (recordsAffected, exception, currentEditRowKeys, currentEditNewValues);
1683                         OnRowDeleted (dargs);
1684                         return dargs.ExceptionHandled;
1685                 }
1686
1687                 void EndRowEdit ()
1688                 {
1689                         EditIndex = -1;
1690                         oldEditValues = new DataKey (new OrderedDictionary ());
1691                         currentEditRowKeys = null;
1692                         currentEditOldValues = null;
1693                         currentEditNewValues = null;
1694                 }
1695
1696                 protected internal override void LoadControlState (object ob)
1697                 {
1698                         if (ob == null) return;
1699                         object[] state = (object[]) ob;
1700                         base.LoadControlState (state[0]);
1701                         pageIndex = (int) state[1];
1702                         pageCount = (int) state[2];
1703                         selectedIndex = (int) state[3];
1704                         editIndex = (int) state[4];
1705                         sortExpression = (string) state[5];
1706                         sortDirection = (SortDirection) state[6];
1707                         DataKeyNames = (string []) state [7];
1708                 }
1709
1710                 protected internal override object SaveControlState ()
1711                 {
1712                         object bstate = base.SaveControlState ();
1713                         return new object[] {
1714                                 bstate, pageIndex, pageCount, selectedIndex, editIndex, sortExpression, sortDirection, DataKeyNames
1715                                         };
1716                 }
1717
1718                 protected override void TrackViewState()
1719                 {
1720                         base.TrackViewState();
1721                         if (columns != null) ((IStateManager)columns).TrackViewState();
1722                         if (pagerSettings != null) ((IStateManager)pagerSettings).TrackViewState();
1723                         if (alternatingRowStyle != null) ((IStateManager)alternatingRowStyle).TrackViewState();
1724                         if (footerStyle != null) ((IStateManager)footerStyle).TrackViewState();
1725                         if (headerStyle != null) ((IStateManager)headerStyle).TrackViewState();
1726                         if (pagerStyle != null) ((IStateManager)pagerStyle).TrackViewState();
1727                         if (rowStyle != null) ((IStateManager)rowStyle).TrackViewState();
1728                         if (selectedRowStyle != null) ((IStateManager)selectedRowStyle).TrackViewState();
1729                         if (editRowStyle != null) ((IStateManager)editRowStyle).TrackViewState();
1730                         if (emptyDataRowStyle != null) ((IStateManager)emptyDataRowStyle).TrackViewState();
1731                         if (keys != null) ((IStateManager)keys).TrackViewState();
1732                         if (autoFieldProperties != null) {
1733                                 foreach (IStateManager sm in autoFieldProperties)
1734                                         sm.TrackViewState ();
1735                         }
1736                 }
1737
1738                 protected override object SaveViewState()
1739                 {
1740                         object[] states = new object [14];
1741                         states[0] = base.SaveViewState();
1742                         states[1] = (columns == null ? null : ((IStateManager)columns).SaveViewState());
1743                         states[2] = (pagerSettings == null ? null : ((IStateManager)pagerSettings).SaveViewState());
1744                         states[3] = (alternatingRowStyle == null ? null : ((IStateManager)alternatingRowStyle).SaveViewState());
1745                         states[4] = (footerStyle == null ? null : ((IStateManager)footerStyle).SaveViewState());
1746                         states[5] = (headerStyle == null ? null : ((IStateManager)headerStyle).SaveViewState());
1747                         states[6] = (pagerStyle == null ? null : ((IStateManager)pagerStyle).SaveViewState());
1748                         states[7] = (rowStyle == null ? null : ((IStateManager)rowStyle).SaveViewState());
1749                         states[8] = (selectedRowStyle == null ? null : ((IStateManager)selectedRowStyle).SaveViewState());
1750                         states[9] = (editRowStyle == null ? null : ((IStateManager)editRowStyle).SaveViewState());
1751                         states[10] = (emptyDataRowStyle == null ? null : ((IStateManager)emptyDataRowStyle).SaveViewState());
1752                         states[11] = (keys == null ? null : ((IStateManager)keys).SaveViewState());
1753                         states[12] = (oldEditValues == null ? null : ((IStateManager)oldEditValues).SaveViewState());
1754
1755                         if (autoFieldProperties != null) {
1756                                 object[] data = new object [autoFieldProperties.Length];
1757                                 bool allNull = true;
1758                                 for (int n=0; n<data.Length; n++) {
1759                                         data [n] = ((IStateManager)autoFieldProperties [n]).SaveViewState ();
1760                                         if (data [n] != null) allNull = false;
1761                                 }
1762                                 if (!allNull) states [13] = data;
1763                         }
1764
1765                         for (int i = states.Length - 1; i >= 0; i--) {
1766                                 if (states [i] != null)
1767                                         return states;
1768                         }
1769
1770                         return null;
1771                 }
1772
1773                 protected override void LoadViewState (object savedState)
1774                 {
1775                         if (savedState == null) {
1776                                 base.LoadViewState (null);
1777                                 return;
1778                         }
1779
1780                         object [] states = (object []) savedState;
1781
1782                         if (states[13] != null) {
1783                                 object[] data = (object[]) states [13];
1784                                 autoFieldProperties = new AutoGeneratedFieldProperties [data.Length];
1785                                 for (int n=0; n<data.Length; n++) {
1786                                         IStateManager p = new AutoGeneratedFieldProperties ();
1787                                         p.TrackViewState ();
1788                                         p.LoadViewState (data [n]);
1789                                         autoFieldProperties [n] = (AutoGeneratedFieldProperties) p;
1790                                 }
1791                         }
1792
1793                         base.LoadViewState (states[0]);
1794                         EnsureChildControls ();
1795
1796                         if (states[1] != null) ((IStateManager)Columns).LoadViewState (states[1]);
1797                         if (states[2] != null) ((IStateManager)PagerSettings).LoadViewState (states[2]);
1798                         if (states[3] != null) ((IStateManager)AlternatingRowStyle).LoadViewState (states[3]);
1799                         if (states[4] != null) ((IStateManager)FooterStyle).LoadViewState (states[4]);
1800                         if (states[5] != null) ((IStateManager)HeaderStyle).LoadViewState (states[5]);
1801                         if (states[6] != null) ((IStateManager)PagerStyle).LoadViewState (states[6]);
1802                         if (states[7] != null) ((IStateManager)RowStyle).LoadViewState (states[7]);
1803                         if (states[8] != null) ((IStateManager)SelectedRowStyle).LoadViewState (states[8]);
1804                         if (states[9] != null) ((IStateManager)EditRowStyle).LoadViewState (states[9]);
1805                         if (states[10] != null) ((IStateManager)EmptyDataRowStyle).LoadViewState (states[10]);
1806                         if (states[11] != null) ((IStateManager)DataKeys).LoadViewState (states[11]);
1807                         if (states[12] != null && oldEditValues != null) ((IStateManager)oldEditValues).LoadViewState (states[12]);
1808                 }
1809
1810                 void ICallbackEventHandler.RaiseCallbackEvent (string eventArgs)
1811                 {
1812                         RaiseCallbackEvent (eventArgs);
1813                 }
1814
1815                 string callbackResult;
1816                 protected virtual void RaiseCallbackEvent (string eventArgs)
1817                 {
1818                         string[] clientData = eventArgs.Split ('|');
1819                         pageIndex = int.Parse (clientData[0]);
1820                         sortExpression = HttpUtility.UrlDecode (clientData[1]);
1821                         if (sortExpression == "") sortExpression = null;
1822                         RequireBinding ();
1823
1824                         RaisePostBackEvent (clientData[2]);
1825                         EnsureDataBound ();
1826
1827                         StringWriter sw = new StringWriter ();
1828                         sw.Write (PageIndex.ToString() + '|' + SortExpression + '|');
1829
1830                         HtmlTextWriter writer = new HtmlTextWriter (sw);
1831                         RenderGrid (writer);
1832                         callbackResult = sw.ToString ();
1833                 }
1834
1835                 string ICallbackEventHandler.GetCallbackResult ()
1836                 {
1837                         return GetCallbackResult ();
1838                 }
1839
1840                 protected virtual string GetCallbackResult ()
1841                 {
1842                         return callbackResult;
1843                 }
1844
1845                 string ICallbackContainer.GetCallbackScript (IButtonControl control, string argument)
1846                 {
1847                         return GetCallbackScript (control, argument);
1848                 }
1849
1850                 protected virtual string GetCallbackScript (IButtonControl control, string argument)
1851                 {
1852                         if (EnableSortingAndPagingCallbacks)
1853                                 return "javascript:GridView_ClientEvent (\"" + ClientID + "\",\"" + control.CommandName + "$" + control.CommandArgument + "\"); return false;";
1854                         else
1855                                 return null;
1856                 }
1857
1858                 [MonoTODO]
1859                 protected override void OnPagePreLoad (object sender, EventArgs e)
1860                 {
1861                         base.OnPagePreLoad (sender, e);
1862                 }
1863
1864                 protected internal override void OnPreRender (EventArgs e)
1865                 {
1866                         base.OnPreRender (e);
1867
1868                         if (EnableSortingAndPagingCallbacks)
1869                         {
1870                                 if (!Page.ClientScript.IsClientScriptIncludeRegistered (typeof(GridView), "GridView.js")) {
1871                                         string url = Page.ClientScript.GetWebResourceUrl (typeof(GridView), "GridView.js");
1872                                         Page.ClientScript.RegisterClientScriptInclude (typeof(GridView), "GridView.js", url);
1873                                 }
1874
1875                                 string cgrid = ClientID + "_data";
1876                                 string script = string.Format ("var {0} = new Object ();\n", cgrid);
1877                                 script += string.Format ("{0}.pageIndex = {1};\n", cgrid, ClientScriptManager.GetScriptLiteral (PageIndex));
1878                                 script += string.Format ("{0}.sortExp = {1};\n", cgrid, ClientScriptManager.GetScriptLiteral (SortExpression == null ? "" : SortExpression));
1879                                 script += string.Format ("{0}.uid = {1};\n", cgrid, ClientScriptManager.GetScriptLiteral (UniqueID));
1880                                 Page.ClientScript.RegisterStartupScript (typeof(TreeView), this.UniqueID, script, true);
1881
1882                                 // Make sure the basic script infrastructure is rendered
1883                                 Page.ClientScript.GetCallbackEventReference (this, "null", "", "null");
1884                                 Page.ClientScript.GetPostBackClientHyperlink (this, "");
1885                         }
1886                 }
1887
1888                 protected internal override void Render (HtmlTextWriter writer)
1889                 {
1890                         PrepareControlHierarchy ();
1891
1892                         if (EnableSortingAndPagingCallbacks)
1893                                 writer.AddAttribute (HtmlTextWriterAttribute.Id, ClientID);
1894                         writer.RenderBeginTag (HtmlTextWriterTag.Div);
1895
1896                         RenderGrid (writer);
1897
1898                         writer.RenderEndTag ();
1899                 }
1900
1901                 void RenderGrid (HtmlTextWriter writer)
1902                 {
1903                         if (table == null)
1904                                 return;
1905
1906                         table.Render (writer);
1907                 }
1908
1909                 [MonoTODO]
1910                 PostBackOptions IPostBackContainer.GetPostBackOptions (IButtonControl control)
1911                 {
1912                         PostBackOptions pbo = new PostBackOptions (this, control.CommandName + "$" + control.CommandArgument);
1913                         return pbo;
1914                 }
1915         }
1916 }
1917
1918 #endif