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

   1 //
   2 // System.Web.UI.WebControls.DataGrid.cs
   3 //
   4 // Authors:
   5 //      Jackson Harper (jackson@ximian.com)
   6 //      Gonzalo Paniagua Javier (gonzalo@ximian.com)
   7 //
   8 // (C) 2005 Novell, Inc (http://www.novell.com)
   9 //
  10 // Permission is hereby granted, free of charge, to any person obtaining
  11 // a copy of this software and associated documentation files (the
  12 // "Software"), to deal in the Software without restriction, including
  13 // without limitation the rights to use, copy, modify, merge, publish,
  14 // distribute, sublicense, and/or sell copies of the Software, and to
  15 // permit persons to whom the Software is furnished to do so, subject to
  16 // the following conditions:
  17 //
  18 // The above copyright notice and this permission notice shall be
  19 // included in all copies or substantial portions of the Software.
  20 //
  21 // THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
  22 // EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
  23 // MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
  24 // NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
  25 // LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
  26 // OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
  27 // WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
  28 //
  29
  30 using System.Web.Util;
  31 using System.Collections;
  32 using System.Globalization;
  33 using System.ComponentModel;
  34 using System.Reflection;
  35 using System.Security.Permissions;
  36
  37 namespace System.Web.UI.WebControls {
  38
  39         // CAS
  40         [AspNetHostingPermissionAttribute (SecurityAction.LinkDemand, Level = AspNetHostingPermissionLevel.Minimal)]
  41         [AspNetHostingPermissionAttribute (SecurityAction.InheritanceDemand, Level = AspNetHostingPermissionLevel.Minimal)]
  42         // attributes
  43         [Editor("System.Web.UI.Design.WebControls.DataGridComponentEditor, " + Consts.AssemblySystem_Design, typeof(System.ComponentModel.ComponentEditor))]
  44         [Designer("System.Web.UI.Design.WebControls.DataGridDesigner, " + Consts.AssemblySystem_Design, "System.ComponentModel.Design.IDesigner")]
  45         public class DataGrid : BaseDataList, INamingContainer {
  46
  47                 public const string CancelCommandName = "Cancel";
  48                 public const string DeleteCommandName = "Delete";
  49                 public const string EditCommandName = "Edit";
  50                 public const string SelectCommandName = "Select";
  51                 public const string SortCommandName = "Sort";
  52                 public const string UpdateCommandName = "Update";
  53
  54                 public const string PageCommandName = "Page";
  55                 public const string NextPageCommandArgument = "Next";
  56                 public const string PrevPageCommandArgument = "Prev";
  57
  58                 static readonly object CancelCommandEvent = new object ();
  59                 static readonly object DeleteCommandEvent = new object ();
  60                 static readonly object EditCommandEvent = new object ();
  61                 static readonly object ItemCommandEvent = new object ();
  62                 static readonly object ItemCreatedEvent = new object ();
  63                 static readonly object ItemDataBoundEvent = new object ();
  64                 static readonly object PageIndexChangedEvent = new object ();
  65                 static readonly object SortCommandEvent = new object ();
  66                 static readonly object UpdateCommandEvent = new object ();
  67
  68                 TableItemStyle alt_item_style;
  69                 TableItemStyle edit_item_style;
  70                 TableItemStyle footer_style;
  71                 TableItemStyle header_style;
  72                 TableItemStyle item_style;
  73                 TableItemStyle selected_style;
  74                 DataGridPagerStyle pager_style;
  75
  76                 ArrayList items_list;
  77                 DataGridItemCollection items;
  78
  79                 ArrayList columns_list;
  80                 DataGridColumnCollection columns;
  81
  82                 ArrayList data_source_columns_list;
  83                 DataGridColumnCollection data_source_columns;
  84
  85                 Table render_table;
  86                 DataGridColumn [] render_columns;
  87                 PagedDataSource paged_data_source;
  88                 IEnumerator data_enumerator;
  89
  90                 [DefaultValue(false)]
  91                 [WebSysDescription ("")]
  92                 [WebCategory ("Paging")]
  93                 public virtual bool AllowCustomPaging {
  94                         get { return ViewState.GetBool ("AllowCustomPaging", false); }
  95                         set { ViewState ["AllowCustomPaging"] = value; }
  96                 }
  97
  98                 [DefaultValue(false)]
  99                 [WebSysDescription ("")]
 100                 [WebCategory ("Paging")]
 101                 public virtual bool AllowPaging {
 102                         get { return ViewState.GetBool ("AllowPaging", false); }
 103                         set { ViewState ["AllowPaging"] = value; }
 104                 }
 105
 106                 [DefaultValue(false)]
 107                 [WebSysDescription ("")]
 108                 [WebCategory ("Behavior")]
 109                 public virtual bool AllowSorting {
 110                         get { return ViewState.GetBool ("AllowSorting", false); }
 111                         set { ViewState ["AllowSorting"] = value; }
 112                 }
 113
 114                 [DefaultValue(true)]
 115                 [WebSysDescription ("")]
 116                 [WebCategory ("Behavior")]
 117                 public virtual bool AutoGenerateColumns {
 118                         get { return ViewState.GetBool ("AutoGenerateColumns", true); }
 119                         set { ViewState ["AutoGenerateColumns"] = value; }
 120                 }
 121
 122 #if NET_2_0
 123                 [UrlProperty]
 124 #else
 125                 [Bindable(true)]
 126 #endif
 127                 [DefaultValue("")]
 128                 [Editor("System.Web.UI.Design.ImageUrlEditor, " + Consts.AssemblySystem_Design, typeof(System.Drawing.Design.UITypeEditor))]
 129                 [WebSysDescription ("")]
 130                 [WebCategory ("Appearance")]
 131                 public virtual string BackImageUrl {
 132                         get { return TableStyle.BackImageUrl; }
 133                         set { TableStyle.BackImageUrl = value; }
 134                 }
 135
 136 #if ONLY_1_1
 137                 [Bindable(true)]
 138 #endif
 139                 [Browsable(false)]
 140                 [DesignerSerializationVisibility(DesignerSerializationVisibility.Hidden)]
 141                 [WebSysDescription ("")]
 142                 [WebCategory ("Behavior")]
 143                 public int CurrentPageIndex {
 144                         get { return ViewState.GetInt ("CurrentPageIndex", 0); }
 145                         set {
 146                                 if (value < 0)
 147                                         throw new ArgumentOutOfRangeException ("value");
 148                                 ViewState ["CurrentPageIndex"] = value;
 149                         }
 150                 }
 151
 152                 [DefaultValue(-1)]
 153                 [WebSysDescription ("")]
 154                 [WebCategory ("Misc")]
 155                 public virtual int EditItemIndex {
 156                         get { return ViewState.GetInt ("EditItemIndex", -1); }
 157                         set {
 158                                 if (value < -1)
 159                                         throw new ArgumentOutOfRangeException ("value");
 160                                 ViewState ["EditItemIndex"] = value;
 161                         }
 162                 }
 163
 164                 [Browsable(false)]
 165                 [DesignerSerializationVisibility(DesignerSerializationVisibility.Hidden)]
 166                 [WebSysDescription ("")]
 167                 [WebCategory ("Style")]
 168                 public int PageCount {
 169                         get {
 170                                 if (paged_data_source != null)
 171                                         return paged_data_source.PageCount;
 172
 173                                 return ViewState.GetInt ("PageCount", 0);
 174                         }
 175                 }
 176
 177                 [DefaultValue(10)]
 178                 [WebSysDescription ("")]
 179                 [WebCategory ("Paging")]
 180                 public virtual int PageSize {
 181                         get { return ViewState.GetInt ("PageSize", 10); }
 182                         set {
 183                                 if (value < 1)
 184                                         throw new ArgumentOutOfRangeException ("value");
 185                                 ViewState ["PageSize"] = value;
 186                         }
 187                 }
 188
 189                 void AdjustItemTypes (int prev_select, int new_select)
 190                 {
 191                         if (items_list == null)
 192                                 return; // nothing to select
 193
 194                         int count = items_list.Count;
 195                         if (count == 0)
 196                                 return; // nothing to select
 197
 198                         DataGridItem item;
 199                         // Restore item type for the previously selected one.
 200                         if (prev_select >= 0 && prev_select < count) {
 201                                 item = (DataGridItem) items_list [prev_select];
 202
 203                                 if (item.ItemType == ListItemType.EditItem) {
 204                                         // nothing to do. This has priority.
 205                                 } else if ((item.ItemIndex % 2) != 0) {
 206                                         item.SetItemType (ListItemType.AlternatingItem);
 207                                 } else {
 208                                         item.SetItemType (ListItemType.Item);
 209                                 }
 210                         }
 211
 212                         if (new_select == -1 || new_select >= count)
 213                                 return; // nothing to select
 214
 215                         item = (DataGridItem) items_list [new_select];
 216                         if (item.ItemType != ListItemType.EditItem) // EditItem takes precedence
 217                                 item.SetItemType (ListItemType.SelectedItem);
 218                 }
 219
 220                 [Bindable(true)]
 221                 [DefaultValue(-1)]
 222                 [WebSysDescription ("")]
 223                 [WebCategory ("Paging")]
 224                 public virtual int SelectedIndex {
 225                         get { return ViewState.GetInt ("SelectedIndex", -1); }
 226                         set {
 227                                 if (value < -1)
 228                                         throw new ArgumentOutOfRangeException ("value");
 229
 230                                 int selected_index = ViewState.GetInt ("SelectedIndex", -1);
 231                                 AdjustItemTypes (selected_index, value);
 232                                 ViewState ["SelectedIndex"] = value;
 233                         }
 234                 }
 235
 236                 [DesignerSerializationVisibility(DesignerSerializationVisibility.Content)]
 237                 [NotifyParentProperty(true)]
 238                 [PersistenceMode(PersistenceMode.InnerProperty)]
 239                 [WebSysDescription ("")]
 240                 [WebCategory ("Style")]
 241                 public virtual TableItemStyle AlternatingItemStyle {
 242                         get {
 243                                 if (alt_item_style == null) {
 244                                         alt_item_style = new TableItemStyle ();
 245                                         if (IsTrackingViewState)
 246                                                 alt_item_style.TrackViewState ();
 247                                 }
 248                                 return alt_item_style;
 249                         }
 250                 }
 251
 252                 [DesignerSerializationVisibility(DesignerSerializationVisibility.Content)]
 253                 [NotifyParentProperty(true)]
 254                 [PersistenceMode(PersistenceMode.InnerProperty)]
 255                 [WebSysDescription ("")]
 256                 [WebCategory ("Style")]
 257                 public virtual TableItemStyle EditItemStyle {
 258                         get {
 259                                 if (edit_item_style == null) {
 260                                         edit_item_style = new TableItemStyle ();
 261                                         if (IsTrackingViewState)
 262                                                 edit_item_style.TrackViewState ();
 263                                 }
 264                                 return edit_item_style;
 265                         }
 266                 }
 267
 268                 [DefaultValue(null)]
 269                 [DesignerSerializationVisibility(DesignerSerializationVisibility.Content)]
 270                 [NotifyParentProperty(true)]
 271                 [PersistenceMode(PersistenceMode.InnerProperty)]
 272                 [WebSysDescription ("")]
 273                 [WebCategory ("Style")]
 274                 public virtual TableItemStyle FooterStyle {
 275                         get {
 276                                 if (footer_style == null) {
 277                                         footer_style = new TableItemStyle ();
 278                                         if (IsTrackingViewState)
 279                                                 footer_style.TrackViewState ();
 280                                 }
 281                                 return footer_style;
 282                         }
 283                 }
 284
 285                 [DefaultValue(null)]
 286                 [DesignerSerializationVisibility(DesignerSerializationVisibility.Content)]
 287                 [NotifyParentProperty(true)]
 288                 [PersistenceMode(PersistenceMode.InnerProperty)]
 289                 [WebSysDescription ("")]
 290                 [WebCategory ("Style")]
 291                 public virtual TableItemStyle HeaderStyle {
 292                         get {
 293                                 if (header_style == null) {
 294                                         header_style = new TableItemStyle ();
 295                                         if (IsTrackingViewState)
 296                                                 header_style.TrackViewState ();
 297                                 }
 298                                 return header_style;
 299                         }
 300                 }
 301
 302                 [DesignerSerializationVisibility(DesignerSerializationVisibility.Content)]
 303                 [NotifyParentProperty(true)]
 304                 [PersistenceMode(PersistenceMode.InnerProperty)]
 305                 [WebSysDescription ("")]
 306                 [WebCategory ("Style")]
 307                 public virtual TableItemStyle ItemStyle {
 308                         get {
 309                                 if (item_style == null) {
 310                                         item_style = new TableItemStyle ();
 311                                         if (IsTrackingViewState)
 312                                                 item_style.TrackViewState ();
 313                                 }
 314                                 return item_style;
 315                         }
 316                 }
 317
 318                 [DesignerSerializationVisibility(DesignerSerializationVisibility.Content)]
 319                 [NotifyParentProperty(true)]
 320                 [PersistenceMode(PersistenceMode.InnerProperty)]
 321                 [WebSysDescription ("")]
 322                 [WebCategory ("Style")]
 323                 public virtual TableItemStyle SelectedItemStyle {
 324                         get {
 325                                 if (selected_style == null) {
 326                                         selected_style = new TableItemStyle ();
 327                                         if (IsTrackingViewState)
 328                                                 selected_style.TrackViewState ();
 329                                 }
 330                                 return selected_style;
 331                         }
 332                 }
 333
 334                 [DesignerSerializationVisibility(DesignerSerializationVisibility.Content)]
 335                 [NotifyParentProperty(true)]
 336                 [PersistenceMode(PersistenceMode.InnerProperty)]
 337                 [WebSysDescription ("")]
 338                 [WebCategory ("Style")]
 339                 public virtual DataGridPagerStyle PagerStyle {
 340                         get {
 341                                 if (pager_style == null) {
 342                                         pager_style = new DataGridPagerStyle ();
 343                                         if (IsTrackingViewState)
 344                                                 pager_style.TrackViewState ();
 345                                 }
 346                                 return pager_style;
 347                         }
 348                 }
 349
 350                 [Browsable(false)]
 351                 [DesignerSerializationVisibility(DesignerSerializationVisibility.Hidden)]
 352                 [WebSysDescription ("")]
 353                 [WebCategory ("Style")]
 354                 public virtual DataGridItemCollection Items {
 355                         get {
 356                                 EnsureChildControls ();
 357                                 if (items == null) {
 358                                         if (items_list == null)
 359                                                 items_list = new ArrayList ();
 360                                         items = new DataGridItemCollection (items_list);
 361                                 }
 362                                 return items;
 363                         }
 364                 }
 365
 366                 [DefaultValue (null)]
 367                 [Editor ("System.Web.UI.Design.WebControls.DataGridColumnCollectionEditor, " + Consts.AssemblySystem_Design, typeof(System.Drawing.Design.UITypeEditor))]
 368                 [MergableProperty (false)]
 369                 [PersistenceMode (PersistenceMode.InnerProperty)]
 370                 [WebSysDescription ("")]
 371                 [WebCategory ("Behavior")]
 372                 public virtual DataGridColumnCollection Columns {
 373                         get {
 374                                 if (columns == null) {
 375                                         columns_list = new ArrayList ();
 376                                         columns = new DataGridColumnCollection (this, columns_list);
 377                                         if (IsTrackingViewState) {
 378                                                 IStateManager manager = (IStateManager) columns;
 379                                                 manager.TrackViewState ();
 380                                         }
 381                                 }
 382                                 return columns;
 383                         }
 384                 }
 385
 386                 DataGridColumnCollection DataSourceColumns {
 387                         get {
 388                                 if (data_source_columns == null) {
 389                                         data_source_columns_list = new ArrayList ();
 390                                         data_source_columns = new DataGridColumnCollection (this,
 391                                                         data_source_columns_list);
 392                                         if (IsTrackingViewState) {
 393                                                 IStateManager manager = (IStateManager) data_source_columns;
 394                                                 manager.TrackViewState ();
 395                                         }
 396                                 }
 397                                 return data_source_columns;
 398                         }
 399                 }
 400
 401                 Table RenderTable {
 402                         get {
 403                                 if (render_table == null) {
 404 #if ONLY_1_1
 405                                         render_table = new TableID (this);
 406 #else
 407                                         render_table = new ChildTable (this);
 408 #endif
 409                                         render_table.AutoID = false;
 410                                 }
 411                                 return render_table;
 412                         }
 413                 }
 414
 415                 [Browsable(false)]
 416                 [DesignerSerializationVisibility(DesignerSerializationVisibility.Hidden)]
 417                 [WebSysDescription ("")]
 418                 [WebCategory ("Paging")]
 419                 public virtual DataGridItem SelectedItem {
 420                         get {
 421                                 if (SelectedIndex == -1)
 422                                         return null;
 423                                 return Items [SelectedIndex];
 424                         }
 425                 }
 426
 427 #if ONLY_1_1
 428                 [Bindable(true)]
 429 #endif
 430                 [DefaultValue(false)]
 431                 [WebSysDescription ("")]
 432                 [WebCategory ("Appearance")]
 433                 public virtual bool ShowFooter {
 434                         get { return ViewState.GetBool ("ShowFooter", false); }
 435                         set { ViewState ["ShowFooter"] = value; }
 436                 }
 437
 438 #if ONLY_1_1
 439                 [Bindable(true)]
 440 #endif
 441                 [DefaultValue(true)]
 442                 [WebSysDescription ("")]
 443                 [WebCategory ("Appearance")]
 444                 public virtual bool ShowHeader {
 445                         get { return ViewState.GetBool ("ShowHeader", true); }
 446                         set { ViewState ["ShowHeader"] = value; }
 447                 }
 448
 449                 [Browsable(false)]
 450                 [DesignerSerializationVisibility(DesignerSerializationVisibility.Hidden)]
 451                 [WebSysDescription ("")]
 452                 [WebCategory ("Appearance")]
 453                 public virtual int VirtualItemCount {
 454                         get { return ViewState.GetInt ("VirtualItemCount", 0); }
 455                         set {
 456                                 if (value < 0)
 457                                         throw new ArgumentOutOfRangeException ("value");
 458                                 ViewState ["VirtualItemCount"] = value;
 459                         }
 460                 }
 461
 462 #if NET_2_0
 463                 protected override HtmlTextWriterTag TagKey {
 464                         get { return HtmlTextWriterTag.Table; }
 465                 }
 466 #endif
 467
 468                 TableStyle TableStyle {
 469                         get { return (TableStyle) ControlStyle; }
 470                 }
 471
 472                 static Type [] item_args = new Type [] {typeof (int) };
 473                 void AddColumnsFromSource (PagedDataSource data_source)
 474                 {
 475                         PropertyDescriptorCollection props = null;
 476                         Type ptype = null;
 477                         bool no_items = false;
 478
 479                         // Use plain reflection for the Item property.
 480                         // If we use TypeDescriptor, props will hold
 481                         // all of the Type properties, which will be listed as columns
 482                         Type ds_type = data_source.GetType ();
 483                         PropertyInfo pinfo = ds_type.GetProperty ("Item", item_args);
 484                         if (pinfo == null) {
 485                                 IEnumerator items = (data_source.DataSource != null) ? data_source.GetEnumerator () : null;
 486                                 if (items != null && items.MoveNext ()) {
 487                                         object data = items.Current;
 488                                         if ((data is ICustomTypeDescriptor) || (!IsBindableType(data.GetType())))
 489                                                 props = TypeDescriptor.GetProperties (data);
 490                                         else if (data != null)
 491                                                 ptype = data.GetType ();
 492                                         data_enumerator = items;
 493                                 } else {
 494                                         no_items = true;
 495                                 }
 496                         } else {
 497                                 ptype = pinfo.PropertyType;
 498                         }
 499
 500                         if (ptype != null) {
 501                                 // Found the "Item" property
 502                                 AddPropertyToColumns ();
 503                         } else if (props != null) {
 504                                 foreach (PropertyDescriptor pd in props)
 505                                         AddPropertyToColumns (pd, false);
 506                         } else if (!no_items) {
 507                                 // This is not thrown for an empty ArrayList.
 508                                 string msg = String.Format ("DataGrid '{0}' cannot autogenerate " +
 509                                                         "columns from the given datasource. {1}", ID, ptype);
 510                                 throw new HttpException (msg);
 511                         }
 512                 }
 513
 514                 protected virtual ArrayList CreateColumnSet (PagedDataSource dataSource, bool useDataSource)
 515                 {
 516                         ArrayList res = new ArrayList ();
 517                         if (columns_list != null)
 518                                 res.AddRange (columns_list);
 519
 520                         if (AutoGenerateColumns) {
 521                                 if (useDataSource) {
 522                                         data_enumerator = null;
 523                                         PropertyDescriptorCollection props = dataSource.GetItemProperties (null);
 524                                         DataSourceColumns.Clear ();
 525                                         if (props != null) {
 526                                                 foreach (PropertyDescriptor d in props)
 527                                                         AddPropertyToColumns (d, false);
 528                                         } else {
 529                                                 AddColumnsFromSource (dataSource);
 530                                         }
 531                                 }
 532
 533                                 if (data_source_columns != null && data_source_columns.Count > 0)
 534                                         res.AddRange (data_source_columns);
 535                         }
 536
 537                         return res;
 538                 }
 539
 540                 void AddPropertyToColumns ()
 541                 {
 542                         BoundColumn b = new BoundColumn ();
 543                         if (IsTrackingViewState) {
 544                                 IStateManager m = (IStateManager) b;
 545                                 m.TrackViewState ();
 546                         }
 547                         b.Set_Owner (this);
 548                         b.HeaderText = "Item";
 549                         b.SortExpression = "Item";
 550                         b.DataField  = BoundColumn.thisExpr;
 551                         DataSourceColumns.Add (b);
 552                 }
 553
 554                 void AddPropertyToColumns (PropertyDescriptor prop, bool tothis)
 555                 {
 556                         BoundColumn b = new BoundColumn ();
 557                         b.Set_Owner (this);
 558                         if (IsTrackingViewState) {
 559                                 IStateManager m = (IStateManager) b;
 560                                 m.TrackViewState ();
 561                         }
 562                         b.HeaderText = prop.Name;
 563                         b.DataField = (tothis ? BoundColumn.thisExpr : prop.Name);
 564                         b.SortExpression = prop.Name;
 565 #if NET_2_0
 566                         if (string.Compare (DataKeyField, b.DataField, StringComparison.InvariantCultureIgnoreCase) == 0) {
 567                                 b.ReadOnly = true;
 568                         }
 569 #endif
 570                         DataSourceColumns.Add (b);
 571                 }
 572
 573                 protected override void TrackViewState ()
 574                 {
 575                         base.TrackViewState ();
 576
 577                         if (pager_style != null)
 578                                 pager_style.TrackViewState ();
 579                         if (header_style != null)
 580                                 header_style.TrackViewState ();
 581                         if (footer_style != null)
 582                                 footer_style.TrackViewState ();
 583                         if (item_style != null)
 584                                 item_style.TrackViewState ();
 585                         if (alt_item_style != null)
 586                                 alt_item_style.TrackViewState ();
 587                         if (selected_style != null)
 588                                 selected_style.TrackViewState ();
 589                         if (edit_item_style != null)
 590                                 edit_item_style.TrackViewState ();
 591 #if NET_2_0
 592                         if (ControlStyleCreated)
 593                                 ControlStyle.TrackViewState ();
 594 #endif
 595                         IStateManager manager = (IStateManager) columns;
 596                         if (manager != null)
 597                                 manager.TrackViewState ();
 598                 }
 599
 600                 protected override object SaveViewState ()
 601                 {
 602 #if NET_2_0
 603                         object [] res = new object [11];
 604 #else
 605                         object [] res = new object [10];
 606 #endif
 607
 608                         res [0] = base.SaveViewState ();
 609                         if (columns != null) {
 610                                 IStateManager cm = (IStateManager) columns;
 611                                 res [1] = cm.SaveViewState ();
 612                         }
 613                         if (pager_style != null)
 614                                 res [2] = pager_style.SaveViewState ();
 615                         if (header_style != null)
 616                                 res [3] = header_style.SaveViewState ();
 617                         if (footer_style != null)
 618                                 res [4] = footer_style.SaveViewState ();
 619                         if (item_style != null)
 620                                 res [5] = item_style.SaveViewState ();
 621                         if (alt_item_style != null)
 622                                 res [6] = alt_item_style.SaveViewState ();
 623                         if (selected_style != null)
 624                                 res [7] = selected_style.SaveViewState ();
 625                         if (edit_item_style != null)
 626                                 res [8] = edit_item_style.SaveViewState ();
 627 #if NET_2_0
 628                         if (ControlStyleCreated)
 629                                 res [9] = ControlStyle.SaveViewState ();
 630
 631                         if (data_source_columns != null) {
 632                                 IStateManager m = (IStateManager) data_source_columns;
 633                                 res [10] = m.SaveViewState ();
 634                         }
 635 #else
 636                         if (data_source_columns != null) {
 637                                 IStateManager m = (IStateManager) data_source_columns;
 638                                 res [9] = m.SaveViewState ();
 639                         }
 640 #endif
 641
 642                         return res;
 643                 }
 644
 645                 protected override void LoadViewState (object savedState)
 646                 {
 647                         object [] pieces = savedState as object [];
 648
 649                         if (pieces == null)
 650                                 return;
 651
 652                         base.LoadViewState (pieces [0]);
 653                         if (columns != null) {
 654                                 IStateManager cm = (IStateManager) columns;
 655                                 cm.LoadViewState (pieces [1]);
 656                         }
 657                         if (pieces [2] != null)
 658                                 PagerStyle.LoadViewState (pieces [2]);
 659                         if (pieces [3] != null)
 660                                 HeaderStyle.LoadViewState (pieces [3]);
 661                         if (pieces [4] != null)
 662                                 FooterStyle.LoadViewState (pieces [4]);
 663                         if (pieces [5] != null)
 664                                 ItemStyle.LoadViewState (pieces [5]);
 665                         if (pieces [6] != null)
 666                                 AlternatingItemStyle.LoadViewState (pieces [6]);
 667                         if (pieces [7] != null)
 668                                 SelectedItemStyle.LoadViewState (pieces [7]);
 669                         if (pieces [8] != null)
 670                                 EditItemStyle.LoadViewState (pieces [8]);
 671
 672 #if NET_2_0
 673                         if (pieces [9] != null)
 674                                 ControlStyle.LoadViewState (pieces [8]);
 675
 676                         if (pieces [10] != null) {
 677                                 // IStateManager manager = (IStateManager) DataSourceColumns;
 678                                 // manager.LoadViewState (pieces [10]);
 679                                 object [] cols = (object []) pieces [10];
 680                                 foreach (object o in cols) {
 681                                         BoundColumn c = new BoundColumn ();
 682                                         ((IStateManager) c).TrackViewState ();
 683                                         c.Set_Owner (this);
 684                                         ((IStateManager) c).LoadViewState (o);
 685                                         DataSourceColumns.Add (c);
 686                                 }
 687                         }
 688 #else
 689                         if (pieces [9] != null) {
 690                                 // IStateManager manager = (IStateManager) DataSourceColumns;
 691                                 // manager.LoadViewState (pieces [9]);
 692                                 object [] cols = (object []) pieces [9];
 693                                 foreach (object o in cols) {
 694                                         BoundColumn c = new BoundColumn ();
 695                                         c.Set_Owner (this);
 696                                         ((IStateManager) c).LoadViewState (o);
 697                                         DataSourceColumns.Add (c);
 698                                 }
 699                         }
 700 #endif
 701                 }
 702
 703                 protected override Style CreateControlStyle ()
 704                 {
 705 #if NET_2_0
 706                         TableStyle res = new TableStyle ();
 707 #else
 708                         TableStyle res = new TableStyle (ViewState);
 709 #endif
 710                         res.GridLines = GridLines.Both;
 711                         res.CellSpacing = 0;
 712                         return res;
 713                 }
 714
 715                 protected virtual void InitializeItem (DataGridItem item, DataGridColumn [] columns)
 716                 {
 717                         bool th = UseAccessibleHeader && item.ItemType == ListItemType.Header;
 718                         for (int i = 0; i < columns.Length; i++) {
 719                                 TableCell cell = null;
 720                                 if (th) {
 721                                         cell = new TableHeaderCell ();
 722                                         cell.Attributes["scope"] = "col";
 723                                 }
 724                                 else
 725                                         cell = new TableCell ();
 726                                 columns [i].InitializeCell (cell, i, item.ItemType);
 727                                 item.Cells.Add (cell);
 728                         }
 729                 }
 730
 731                 protected virtual void InitializePager (DataGridItem item, int columnSpan, PagedDataSource pagedDataSource)
 732                 {
 733                         TableCell pager_cell;
 734                         if (PagerStyle.Mode == PagerMode.NextPrev)
 735                                 pager_cell = InitializeNextPrevPager (item, columnSpan, pagedDataSource);
 736                         else
 737                                 pager_cell = InitializeNumericPager (item, columnSpan, pagedDataSource);
 738
 739                         item.Controls.Add (pager_cell);
 740                 }
 741
 742                 TableCell InitializeNumericPager (DataGridItem item, int columnSpan,
 743                                 PagedDataSource paged)
 744                 {
 745                         TableCell res = new TableCell ();
 746                         res.ColumnSpan = columnSpan;
 747
 748                         int button_count = PagerStyle.PageButtonCount;
 749                         int current = paged.CurrentPageIndex;
 750                         int start = current - (current % button_count);
 751                         int end = start + button_count;
 752
 753                         if (end > paged.PageCount)
 754                                 end = paged.PageCount;
 755
 756                         if (start > 0) {
 757                                 LinkButton link = new LinkButton ();
 758                                 link.Text = "...";
 759                                 link.CommandName = PageCommandName;
 760                                 link.CommandArgument = start.ToString (Helpers.InvariantCulture);
 761                                 link.CausesValidation = false;
 762                                 res.Controls.Add (link);
 763                                 res.Controls.Add (new LiteralControl ("&nbsp;"));
 764                         }
 765
 766                         for (int i = start; i < end; i++) {
 767                                 Control number = null;
 768                                 string page = (i + 1).ToString (Helpers.InvariantCulture);
 769                                 if (i != paged.CurrentPageIndex) {
 770                                         LinkButton link = new LinkButton ();
 771                                         link.Text = page;
 772                                         link.CommandName = PageCommandName;
 773                                         link.CommandArgument = page;
 774                                         link.CausesValidation = false;
 775                                         number = link;
 776                                 } else {
 777                                         Label pageLabel = new Label();
 778                                         pageLabel.Text = page;
 779                                         number = pageLabel;
 780                                 }
 781
 782                                 res.Controls.Add (number);
 783                                 if (i < end - 1)
 784                                         res.Controls.Add (new LiteralControl ("&nbsp;"));
 785                         }
 786
 787                         if (end < paged.PageCount) {
 788                                 res.Controls.Add (new LiteralControl ("&nbsp;"));
 789                                 LinkButton link = new LinkButton ();
 790                                 link.Text = "...";
 791                                 link.CommandName = PageCommandName;
 792                                 link.CommandArgument = (end + 1).ToString (Helpers.InvariantCulture);
 793                                 link.CausesValidation = false;
 794                                 res.Controls.Add (link);
 795                         }
 796
 797                         return res;
 798                 }
 799
 800                 TableCell InitializeNextPrevPager (DataGridItem item, int columnSpan, PagedDataSource paged)
 801                 {
 802                         TableCell res = new TableCell ();
 803                         res.ColumnSpan = columnSpan;
 804
 805                         Control prev;
 806                         Control next;
 807
 808                         if (paged.IsFirstPage) {
 809                                 Label l = new Label ();
 810                                 l.Text = PagerStyle.PrevPageText;
 811                                 prev = l;
 812                         } else {
 813 #if NET_2_0
 814                                 LinkButton l = new DataControlLinkButton ();
 815 #else
 816                                 LinkButton l = new LinkButton ();
 817 #endif
 818                                 l.Text = PagerStyle.PrevPageText;
 819                                 l.CommandName = PageCommandName;
 820                                 l.CommandArgument = PrevPageCommandArgument;
 821                                 l.CausesValidation = false;
 822                                 prev = l;
 823                         }
 824
 825                         if (paged.Count > 0 && !paged.IsLastPage) {
 826 #if NET_2_0
 827                                 LinkButton l = new DataControlLinkButton ();
 828 #else
 829                                 LinkButton l = new LinkButton ();
 830 #endif
 831                                 l.Text = PagerStyle.NextPageText;
 832                                 l.CommandName = PageCommandName;
 833                                 l.CommandArgument = NextPageCommandArgument;
 834                                 l.CausesValidation = false;
 835                                 next = l;
 836                         } else {
 837                                 Label l = new Label ();
 838                                 l.Text = PagerStyle.NextPageText;
 839                                 next = l;
 840                         }
 841
 842                         res.Controls.Add (prev);
 843                         res.Controls.Add (new LiteralControl ("&nbsp;"));
 844                         res.Controls.Add (next);
 845
 846                         return res;
 847                 }
 848
 849                 protected virtual DataGridItem CreateItem (int itemIndex, int dataSourceIndex,
 850                                 ListItemType itemType)
 851                 {
 852                         DataGridItem res = new DataGridItem (itemIndex, dataSourceIndex, itemType);
 853                         return res;
 854                 }
 855
 856                 DataGridItem CreateItem (int item_index, int data_source_index,
 857                                 ListItemType type, bool data_bind, object data_item,
 858                                 PagedDataSource paged)
 859                 {
 860                         DataGridItem res = CreateItem (item_index, data_source_index, type);
 861                         DataGridItemEventArgs args = new DataGridItemEventArgs (res);
 862                         bool no_pager = (type != ListItemType.Pager);
 863
 864                         if (no_pager) {
 865                                 InitializeItem (res, render_columns);
 866                                 if (data_bind)
 867                                         res.DataItem = data_item;
 868                                 OnItemCreated (args);
 869                         } else {
 870                                 InitializePager (res, render_columns.Length, paged);
 871                                 if (pager_style != null)
 872                                         res.ApplyStyle (pager_style);
 873                                 OnItemCreated (args);
 874                         }
 875
 876                         // Add before the column is bound, so that the
 877                         // value is saved in the viewstate
 878                         RenderTable.Controls.Add (res);
 879
 880                         if (no_pager && data_bind) {
 881                                 res.DataBind ();
 882                                 OnItemDataBound (args);
 883                                 res.DataItem = null;
 884                         }
 885                         return res;
 886                 }
 887
 888                 class NCollection : ICollection {
 889                         int n;
 890
 891                         public NCollection (int n)
 892                         {
 893                                 this.n = n;
 894                         }
 895
 896                         public IEnumerator GetEnumerator ()
 897                         {
 898                                 for (int i = 0; i < n; i++)
 899                                         yield return i;
 900                         }
 901
 902                         public int Count {
 903                                 get { return n; }
 904                         }
 905
 906                         public bool IsSynchronized {
 907                                 get { return false; }
 908                         }
 909
 910                         public object SyncRoot {
 911                                 get { return this; }
 912                         }
 913
 914                         public void CopyTo (Array array, int index)
 915                         {
 916                                 throw new NotImplementedException ("This should never be called");
 917                         }
 918                 }
 919
 920                 protected override void CreateControlHierarchy (bool useDataSource)
 921                 {
 922                         Controls.Clear ();
 923                         RenderTable.Controls.Clear ();
 924                         Controls.Add (RenderTable);
 925
 926                         IEnumerable data_source;
 927                         ArrayList keys = null;
 928                         if (useDataSource) {
 929 #if NET_2_0
 930                                 if (IsBoundUsingDataSourceID)
 931                                         data_source = GetData ();
 932                                 else
 933 #endif
 934                                 data_source = DataSourceResolver.ResolveDataSource (DataSource, DataMember);
 935                                 if (data_source == null) {
 936                                         Controls.Clear ();
 937                                         return;
 938                                 }
 939
 940                                 keys = DataKeysArray;
 941                                 keys.Clear ();
 942                         } else {
 943                                 int nitems = ViewState.GetInt ("Items", 0);
 944                                 data_source = new NCollection (nitems);
 945                         }
 946
 947                         paged_data_source = new PagedDataSource ();
 948                         PagedDataSource pds = paged_data_source;
 949                         pds.AllowPaging = AllowPaging;
 950                         pds.AllowCustomPaging = AllowCustomPaging;
 951                         pds.DataSource = data_source;
 952                         pds.CurrentPageIndex = CurrentPageIndex;
 953                         pds.PageSize = PageSize;
 954                         pds.VirtualCount = VirtualItemCount;
 955
 956                         if ((pds.IsPagingEnabled) && (pds.PageCount < pds.CurrentPageIndex)) {
 957                                 Controls.Clear ();
 958                                 throw new HttpException ("Invalid DataGrid PageIndex");
 959                         }
 960
 961                         ArrayList cList = CreateColumnSet (paged_data_source, useDataSource);
 962                         if (cList.Count == 0) {
 963                                 Controls.Clear ();
 964                                 return;
 965                         }
 966
 967                         Page page = this.Page;
 968                         if (page != null)
 969                                 page.RequiresPostBackScript ();
 970
 971                         render_columns = new DataGridColumn [cList.Count];
 972                         for (int c = 0; c < cList.Count; c++) {
 973                                 DataGridColumn col = (DataGridColumn) cList [c];
 974                                 col.Set_Owner (this);
 975                                 col.Initialize ();
 976                                 render_columns [c] = col;
 977                         }
 978
 979                         if (pds.IsPagingEnabled)
 980                                 CreateItem (-1, -1, ListItemType.Pager, false, null, pds);
 981
 982                         CreateItem (-1, -1, ListItemType.Header, useDataSource, null, pds);
 983
 984                         // No indexer on PagedDataSource so we have to do
 985                         // this silly foreach and index++
 986                         if (items_list == null)
 987                                 items_list = new ArrayList ();
 988                         else
 989                                 items_list.Clear();
 990
 991                         bool skip_first = false;
 992                         IEnumerator enumerator = null;
 993                         if (data_enumerator != null) {
 994                                 // replaced when creating bound columns
 995                                 enumerator = data_enumerator;
 996                                 skip_first = true;
 997                         } else if (pds.DataSource != null) {
 998                                 enumerator = pds.GetEnumerator ();
 999                         } else {
1000                                 enumerator = null;
1001                         }
1002
1003                         int index = 0;
1004                         bool first = true;
1005                         string key = null;
1006                         int dataset_index = pds.FirstIndexInPage;
1007                         int selected_index = SelectedIndex;
1008                         int edit_item_index = EditItemIndex;
1009                         while (enumerator != null && (skip_first || enumerator.MoveNext ())) {
1010                                 // MS does not render <table blah></table> on empty datasource.
1011                                 if (first) {
1012                                         first = false;
1013                                         key = DataKeyField;
1014                                         skip_first = false;
1015                                 }
1016                                 object data = enumerator.Current;
1017                                 // This will throw if the DataKeyField is not there. As on MS, this
1018                                 // will not be hit on an empty datasource.
1019                                 // The values stored here can be used in events so that you can
1020                                 // get, for example, the row that was clicked
1021                                 // (data.Rows.Find (ItemsGrid.DataKeys [e.Item.ItemIndex]))
1022                                 // BaseDataList will keep the array across postbacks.
1023                                 if (useDataSource && key != "")
1024                                         keys.Add (DataBinder.GetPropertyValue (data, key));
1025
1026                                 ListItemType type = ListItemType.Item;
1027                                 if (index == edit_item_index)
1028                                         type = ListItemType.EditItem;
1029                                 else if (index == selected_index)
1030                                         type = ListItemType.SelectedItem;
1031                                 else if (index % 2 != 0)
1032                                         type = ListItemType.AlternatingItem;
1033
1034                                 items_list.Add (CreateItem (index, dataset_index, type, useDataSource, data, pds));
1035                                 index++;
1036                                 dataset_index++;
1037                         }
1038
1039                         CreateItem (-1, -1, ListItemType.Footer, useDataSource, null, paged_data_source);
1040                         if (pds.IsPagingEnabled) {
1041                                 CreateItem (-1, -1, ListItemType.Pager, false, null, paged_data_source);
1042                                 if (useDataSource)
1043                                         ViewState ["Items"] = pds.IsCustomPagingEnabled ? index : pds.DataSourceCount;
1044                         } else if (useDataSource) {
1045                                 ViewState ["Items"] = index;
1046                         }
1047                 }
1048
1049                 void ApplyColumnStyle (TableCellCollection cells, ListItemType type)
1050                 {
1051                         int ncells = Math.Min (cells.Count, render_columns.Length);
1052                         if (ncells <= 0)
1053                                 return;
1054
1055                         for (int i = 0; i < ncells; i++) {
1056                                 Style style = null;
1057                                 TableCell cell = cells [i];
1058                                 DataGridColumn column = render_columns [i];
1059                                 if (!column.Visible) {
1060                                         cell.Visible = false;
1061                                         continue;
1062                                 }
1063
1064                                 style = column.GetStyle (type);
1065                                 if (style != null)
1066                                         cell.MergeStyle (style);
1067                         }
1068                 }
1069
1070                 protected override void PrepareControlHierarchy ()
1071                 {
1072                         if (!HasControls () || Controls.Count == 0)
1073                                 return; // No one called CreateControlHierarchy() with DataSource != null
1074
1075                         Table rt = render_table;
1076                         rt.CopyBaseAttributes (this);
1077                         rt.ApplyStyle (ControlStyle);
1078
1079                         rt.Caption = Caption;
1080                         rt.CaptionAlign = CaptionAlign;
1081                         rt.Enabled = Enabled;
1082
1083                         bool top_pager = true;
1084                         foreach (DataGridItem item in rt.Rows) {
1085
1086                                 switch (item.ItemType) {
1087                                 case ListItemType.Item:
1088                                         ApplyItemStyle (item);
1089                                         break;
1090                                 case ListItemType.AlternatingItem:
1091                                         ApplyItemStyle (item);
1092                                         break;
1093                                 case ListItemType.EditItem:
1094                                         item.MergeStyle (edit_item_style);
1095                                         ApplyItemStyle (item);
1096                                         ApplyColumnStyle (item.Cells, ListItemType.EditItem);
1097                                         break;
1098                                 case ListItemType.Footer:
1099                                         if (!ShowFooter) {
1100                                                 item.Visible = false;
1101                                                 break;
1102                                         }
1103                                         if (footer_style != null)
1104                                                 item.MergeStyle (footer_style);
1105                                         ApplyColumnStyle (item.Cells, ListItemType.Footer);
1106                                         break;
1107                                 case ListItemType.Header:
1108                                         if (!ShowHeader) {
1109                                                 item.Visible = false;
1110                                                 break;
1111                                         }
1112                                         if (header_style != null)
1113                                                 item.MergeStyle (header_style);
1114                                         ApplyColumnStyle (item.Cells, ListItemType.Header);
1115                                         break;
1116                                 case ListItemType.SelectedItem:
1117                                         item.MergeStyle (selected_style);
1118                                         ApplyItemStyle (item);
1119                                         ApplyColumnStyle (item.Cells, ListItemType.SelectedItem);
1120                                         break;
1121                                 case ListItemType.Separator:
1122                                         ApplyColumnStyle (item.Cells, ListItemType.Separator);
1123                                         break;
1124                                 case ListItemType.Pager:
1125                                         DataGridPagerStyle ps = PagerStyle;
1126                                         if (ps.Visible == false || !paged_data_source.IsPagingEnabled) {
1127                                                 item.Visible = false;
1128                                         } else {
1129                                                 if (top_pager)
1130                                                         item.Visible = (ps.Position != PagerPosition.Bottom);
1131                                                 else
1132                                                         item.Visible = (ps.Position != PagerPosition.Top);
1133                                                 top_pager = false;
1134                                         }
1135
1136                                         if (item.Visible)
1137                                                 item.MergeStyle (pager_style);
1138                                         break;
1139                                 }
1140                         }
1141                 }
1142
1143                 void ApplyItemStyle (DataGridItem item)
1144                 {
1145                         if (item.ItemIndex % 2 != 0)
1146                                 item.MergeStyle (alt_item_style);
1147
1148                         item.MergeStyle (item_style);
1149                         ApplyColumnStyle (item.Cells, ListItemType.Item);
1150                 }
1151
1152                 protected override bool OnBubbleEvent (object source, EventArgs e)
1153                 {
1154                         DataGridCommandEventArgs de = e as DataGridCommandEventArgs;
1155
1156                         if (de == null)
1157                                 return false;
1158
1159                         string cn = de.CommandName;
1160                         CultureInfo inv = Helpers.InvariantCulture;
1161
1162                         OnItemCommand (de);
1163                         if (String.Compare (cn, CancelCommandName, true, inv) == 0) {
1164                                 OnCancelCommand (de);
1165                         } else if (String.Compare (cn, DeleteCommandName, true, inv) == 0) {
1166                                 OnDeleteCommand (de);
1167                         } else if (String.Compare (cn, EditCommandName, true, inv) == 0) {
1168                                 OnEditCommand (de);
1169                         } else if (String.Compare (cn, SelectCommandName, true, inv) == 0) {
1170                                 SelectedIndex = de.Item.ItemIndex;
1171                                 OnSelectedIndexChanged (de);
1172                         } else if (String.Compare (cn, SortCommandName, true, inv) == 0) {
1173                                 DataGridSortCommandEventArgs se = new DataGridSortCommandEventArgs (de.CommandSource, de);
1174                                 OnSortCommand (se);
1175                         } else if (String.Compare (cn, UpdateCommandName, true, inv) == 0) {
1176                                 OnUpdateCommand (de);
1177                         } else if (String.Compare (cn, PageCommandName, true, inv) == 0) {
1178                                 int new_index;
1179                                 if (String.Compare ((string) de.CommandArgument,
1180                                                     NextPageCommandArgument, true, inv) == 0) {
1181                                         new_index = CurrentPageIndex + 1;
1182                                 } else if (String.Compare ((string) de.CommandArgument,
1183                                                            PrevPageCommandArgument, true, inv) == 0) {
1184                                         new_index = CurrentPageIndex - 1;
1185                                 } else {
1186                                         // It seems to just assume it's an int and parses, no
1187                                         // checks to make sure its valid or anything.
1188                                         //  also it's always one less then specified, not sure
1189                                         // why that is.
1190                                         new_index = Int32.Parse ((string) de.CommandArgument, inv) - 1;
1191                                 }
1192                                 DataGridPageChangedEventArgs pc = new DataGridPageChangedEventArgs (
1193                                         de.CommandSource, new_index);
1194                                 OnPageIndexChanged (pc);
1195                         }
1196
1197                         return true;
1198                 }
1199
1200                 protected virtual void OnCancelCommand (DataGridCommandEventArgs e)
1201                 {
1202                         DataGridCommandEventHandler handler = (DataGridCommandEventHandler) Events [CancelCommandEvent];
1203                         if (handler != null)
1204                                 handler (this, e);
1205                 }
1206
1207                 protected virtual void OnDeleteCommand (DataGridCommandEventArgs e)
1208                 {
1209                         DataGridCommandEventHandler handler = (DataGridCommandEventHandler) Events [DeleteCommandEvent];
1210                         if (handler != null)
1211                                 handler (this, e);
1212                 }
1213
1214                 protected virtual void OnEditCommand (DataGridCommandEventArgs e)
1215                 {
1216                         DataGridCommandEventHandler handler = (DataGridCommandEventHandler) Events [EditCommandEvent];
1217                         if (handler != null)
1218                                 handler (this, e);
1219                 }
1220
1221                 protected virtual void OnItemCommand (DataGridCommandEventArgs e)
1222                 {
1223                         DataGridCommandEventHandler handler = (DataGridCommandEventHandler) Events [ItemCommandEvent];
1224                         if (handler != null)
1225                                 handler (this, e);
1226                 }
1227
1228                 protected virtual void OnItemCreated (DataGridItemEventArgs e)
1229                 {
1230                         DataGridItemEventHandler handler = (DataGridItemEventHandler) Events [ItemCreatedEvent];
1231                         if (handler != null)
1232                                 handler (this, e);
1233                 }
1234
1235                 protected virtual void OnItemDataBound (DataGridItemEventArgs e)
1236                 {
1237                         DataGridItemEventHandler handler = (DataGridItemEventHandler) Events [ItemDataBoundEvent];
1238                         if (handler != null)
1239                                 handler (this, e);
1240                 }
1241
1242                 protected virtual void OnPageIndexChanged (DataGridPageChangedEventArgs e)
1243                 {
1244                         DataGridPageChangedEventHandler handler = (DataGridPageChangedEventHandler) Events [PageIndexChangedEvent];
1245                         if (handler != null)
1246                                 handler (this, e);
1247                 }
1248
1249                 protected virtual void OnSortCommand (DataGridSortCommandEventArgs e)
1250                 {
1251                         DataGridSortCommandEventHandler handler = (DataGridSortCommandEventHandler) Events [SortCommandEvent];
1252                         if (handler != null)
1253                                 handler (this, e);
1254                 }
1255
1256                 protected virtual void OnUpdateCommand (DataGridCommandEventArgs e)
1257                 {
1258                         DataGridCommandEventHandler handler = (DataGridCommandEventHandler) Events [UpdateCommandEvent];
1259                         if (handler != null)
1260                                 handler (this, e);
1261                 }
1262
1263                 [WebSysDescription ("")]
1264                 [WebCategory ("Action")]
1265                 public event DataGridCommandEventHandler CancelCommand {
1266                         add { Events.AddHandler (CancelCommandEvent, value); }
1267                         remove { Events.RemoveHandler (CancelCommandEvent, value); }
1268                 }
1269
1270                 [WebSysDescription ("")]
1271                 [WebCategory ("Action")]
1272                 public event DataGridCommandEventHandler DeleteCommand {
1273                         add { Events.AddHandler (DeleteCommandEvent, value); }
1274                         remove { Events.RemoveHandler (DeleteCommandEvent, value); }
1275                 }
1276
1277                 [WebSysDescription ("")]
1278                 [WebCategory ("Action")]
1279                 public event DataGridCommandEventHandler EditCommand {
1280                         add { Events.AddHandler (EditCommandEvent, value); }
1281                         remove { Events.RemoveHandler (EditCommandEvent, value); }
1282                 }
1283
1284                 [WebSysDescription ("")]
1285                 [WebCategory ("Action")]
1286                 public event DataGridCommandEventHandler ItemCommand {
1287                         add { Events.AddHandler (ItemCommandEvent, value); }
1288                         remove { Events.RemoveHandler (ItemCommandEvent, value); }
1289
1290                 }
1291
1292                 [WebSysDescription ("")]
1293                 [WebCategory ("Action")]
1294                 public event DataGridItemEventHandler ItemCreated {
1295                         add { Events.AddHandler (ItemCreatedEvent, value); }
1296                         remove { Events.RemoveHandler (ItemCreatedEvent, value); }
1297                 }
1298
1299                 [WebSysDescription ("")]
1300                 [WebCategory ("Action")]
1301                 public event DataGridItemEventHandler ItemDataBound {
1302                         add { Events.AddHandler (ItemDataBoundEvent, value); }
1303                         remove { Events.RemoveHandler (ItemDataBoundEvent, value); }
1304                 }
1305
1306                 [WebSysDescription ("")]
1307                 [WebCategory ("Action")]
1308                 public event DataGridPageChangedEventHandler PageIndexChanged {
1309                         add { Events.AddHandler (PageIndexChangedEvent, value); }
1310                         remove { Events.RemoveHandler (PageIndexChangedEvent, value); }
1311                 }
1312
1313                 [WebSysDescription ("")]
1314                 [WebCategory ("Action")]
1315                 public event DataGridSortCommandEventHandler SortCommand {
1316                         add { Events.AddHandler (SortCommandEvent, value); }
1317                         remove { Events.RemoveHandler (SortCommandEvent, value); }
1318                 }
1319
1320                 [WebSysDescription ("")]
1321                 [WebCategory ("Action")]
1322                 public event DataGridCommandEventHandler UpdateCommand {
1323                         add { Events.AddHandler (UpdateCommandEvent, value); }
1324                         remove { Events.AddHandler (UpdateCommandEvent, value); }
1325                 }
1326         }
1327 }
1328
1329