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                 private static readonly object CancelCommandEvent = new object ();
  59                 private static readonly object DeleteCommandEvent = new object ();
  60                 private static readonly object EditCommandEvent = new object ();
  61                 private static readonly object ItemCommandEvent = new object ();
  62                 private static readonly object ItemCreatedEvent = new object ();
  63                 private static readonly object ItemDataBoundEvent = new object ();
  64                 private static readonly object PageIndexChangedEvent = new object ();
  65                 private static readonly object SortCommandEvent = new object ();
  66                 private static readonly object UpdateCommandEvent = new object ();
  67
  68                 private TableItemStyle alt_item_style;
  69                 private TableItemStyle edit_item_style;
  70                 private TableItemStyle footer_style;
  71                 private TableItemStyle header_style;
  72                 private TableItemStyle item_style;
  73                 private TableItemStyle selected_style;
  74                 private DataGridPagerStyle pager_style;
  75
  76                 private ArrayList items_list;
  77                 private DataGridItemCollection items;
  78
  79                 private ArrayList columns_list;
  80                 private DataGridColumnCollection columns;
  81
  82                 private ArrayList data_source_columns_list;
  83                 private DataGridColumnCollection data_source_columns;
  84
  85                 private Table render_table;
  86                 private DataGridColumn [] render_columns;
  87                 private PagedDataSource paged_data_source;
  88                 private 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                                 if (items == null) {
 357                                         if (items_list == null)
 358                                                 items_list = new ArrayList ();
 359                                         items = new DataGridItemCollection (items_list);
 360                                 }
 361                                 return items;
 362                         }
 363                 }
 364
 365                 [DefaultValue (null)]
 366                 [Editor ("System.Web.UI.Design.WebControls.DataGridColumnCollectionEditor, " + Consts.AssemblySystem_Design, typeof(System.Drawing.Design.UITypeEditor))]
 367                 [MergableProperty (false)]
 368                 [PersistenceMode (PersistenceMode.InnerProperty)]
 369                 [WebSysDescription ("")]
 370                 [WebCategory ("Behavior")]
 371                 public virtual DataGridColumnCollection Columns {
 372                         get {
 373                                 if (columns == null) {
 374                                         columns_list = new ArrayList ();
 375                                         columns = new DataGridColumnCollection (this, columns_list);
 376                                         if (IsTrackingViewState) {
 377                                                 IStateManager manager = (IStateManager) columns;
 378                                                 manager.TrackViewState ();
 379                                         }
 380                                 }
 381                                 return columns;
 382                         }
 383                 }
 384
 385                 private DataGridColumnCollection DataSourceColumns {
 386                         get {
 387                                 if (data_source_columns == null) {
 388                                         data_source_columns_list = new ArrayList ();
 389                                         data_source_columns = new DataGridColumnCollection (this,
 390                                                         data_source_columns_list);
 391                                         if (IsTrackingViewState) {
 392                                                 IStateManager manager = (IStateManager) data_source_columns;
 393                                                 manager.TrackViewState ();
 394                                         }
 395                                 }
 396                                 return data_source_columns;
 397                         }
 398                 }
 399
 400                 class TableID : Table {
 401                         Control parent;
 402
 403                         public TableID (Control parent)
 404                         {
 405                                 this.parent = parent;
 406                         }
 407
 408                         protected override void AddAttributesToRender (HtmlTextWriter writer)
 409                         {
 410                                 base.AddAttributesToRender (writer);
 411                                 if (ID == null)
 412                                         writer.AddAttribute ("id", parent.ClientID);
 413                         }
 414                 }
 415
 416                 private Table RenderTable {
 417                         get {
 418                                 if (render_table == null) {
 419                                         render_table = new TableID (this);
 420                                         render_table.AutoID = false;
 421                                 }
 422                                 return render_table;
 423                         }
 424                 }
 425
 426                 private void CreateRenderColumns (PagedDataSource paged, bool useDataSource)
 427                 {
 428                         if (useDataSource) {
 429                                 ArrayList columns_list = CreateColumnSet (paged, useDataSource);
 430                                 render_columns = new DataGridColumn [columns_list.Count];
 431
 432                                 for (int c = 0; c < render_columns.Length; c++) {
 433                                         DataGridColumn col = (DataGridColumn) columns_list [c];
 434                                         col.Set_Owner (this);
 435                                         col.Initialize ();
 436                                         render_columns [c] = col;
 437                                 }
 438                         } else {
 439                                 render_columns = new DataGridColumn [Columns.Count];
 440                                 Columns.CopyTo (render_columns, 0);
 441                         }
 442                 }
 443
 444                 [MonoTODO]
 445                 [Browsable(false)]
 446                 [DesignerSerializationVisibility(DesignerSerializationVisibility.Hidden)]
 447                 [WebSysDescription ("")]
 448                 [WebCategory ("Paging")]
 449                 public virtual DataGridItem SelectedItem {
 450                         get {
 451                                 if (SelectedIndex == -1)
 452                                         return null;
 453                                 return Items [SelectedIndex];
 454                         }
 455                 }
 456
 457 #if ONLY_1_1
 458                 [Bindable(true)]
 459 #endif
 460                 [DefaultValue(false)]
 461                 [WebSysDescription ("")]
 462                 [WebCategory ("Appearance")]
 463                 public virtual bool ShowFooter {
 464                         get { return ViewState.GetBool ("ShowFooter", false); }
 465                         set { ViewState ["ShowFooter"] = value; }
 466                 }
 467
 468 #if ONLY_1_1
 469                 [Bindable(true)]
 470 #endif
 471                 [DefaultValue(true)]
 472                 [WebSysDescription ("")]
 473                 [WebCategory ("Appearance")]
 474                 public virtual bool ShowHeader {
 475                         get { return ViewState.GetBool ("ShowHeader", true); }
 476                         set { ViewState ["ShowHeader"] = value; }
 477                 }
 478
 479                 [Browsable(false)]
 480                 [DesignerSerializationVisibility(DesignerSerializationVisibility.Hidden)]
 481                 [WebSysDescription ("")]
 482                 [WebCategory ("Appearance")]
 483                 public virtual int VirtualItemCount {
 484                         get { return ViewState.GetInt ("VirtualItemCount", 0); }
 485                         set {
 486                                 if (value < 0)
 487                                         throw new ArgumentOutOfRangeException ("value");
 488                                 ViewState ["VirtualItemCount"] = value;
 489                         }
 490                 }
 491
 492 #if NET_2_0
 493                 protected override HtmlTextWriterTag TagKey {
 494                         get { return HtmlTextWriterTag.Table; }
 495                 }
 496 #endif
 497
 498                 private TableStyle TableStyle {
 499                         get { return (TableStyle) ControlStyle; }
 500                 }
 501
 502                 static Type [] item_args = new Type [] {typeof (int) };
 503                 void AddColumnsFromSource (PagedDataSource data_source)
 504                 {
 505                         PropertyDescriptorCollection props = null;
 506                         Type ptype = null;
 507                         bool no_items = false;
 508
 509                         // Use plain reflection for the Item property.
 510                         // If we use TypeDescriptor, props will hold
 511                         // all of the Type properties, which will be listed as columns
 512                         Type ds_type = data_source.GetType ();
 513                         PropertyInfo pinfo = ds_type.GetProperty ("Item", item_args);
 514                         if (pinfo == null) {
 515                                 IEnumerator items = (data_source.DataSource != null) ? data_source.GetEnumerator () : null;
 516                                 if (items != null && items.MoveNext ()) {
 517                                         object data = items.Current;
 518                                         if ((data is ICustomTypeDescriptor) || (!IsBindableType(data.GetType())))
 519                                                 props = TypeDescriptor.GetProperties (data);
 520                                         else if (data != null)
 521                                                 ptype = data.GetType ();
 522                                         data_enumerator = items;
 523                                 } else {
 524                                         no_items = true;
 525                                 }
 526                         } else {
 527                                 ptype = pinfo.PropertyType;
 528                         }
 529
 530                         if (ptype != null) {
 531                                 // Found the "Item" property
 532                                 AddPropertyToColumns ();
 533                         } else if (props != null) {
 534                                 foreach (PropertyDescriptor pd in props)
 535                                         AddPropertyToColumns (pd, false);
 536                         } else if (!no_items) {
 537                                 // This is not thrown for an empty ArrayList.
 538                                 string msg = String.Format ("DataGrid '{0}' cannot autogenerate " +
 539                                                         "columns from the given datasource. {1}", ID, ptype);
 540                                 throw new HttpException (msg);
 541                         }
 542                 }
 543
 544                 protected virtual ArrayList CreateColumnSet (PagedDataSource dataSource, bool useDataSource)
 545                 {
 546                         ArrayList res = new ArrayList ();
 547                         if (columns_list != null)
 548                                 res.AddRange (columns_list);
 549
 550                         if (AutoGenerateColumns) {
 551                                 if (useDataSource) {
 552                                         data_enumerator = null;
 553                                         PropertyDescriptorCollection props = dataSource.GetItemProperties (null);
 554                                         DataSourceColumns.Clear ();
 555                                         if (props != null) {
 556                                                 foreach (PropertyDescriptor d in props)
 557                                                         AddPropertyToColumns (d, false);
 558                                         } else {
 559                                                 AddColumnsFromSource (dataSource);
 560                                         }
 561                                 }
 562
 563                                 if (data_source_columns != null && data_source_columns.Count > 0)
 564                                         res.AddRange (data_source_columns);
 565                         }
 566
 567                         return res;
 568                 }
 569
 570                 private void AddPropertyToColumns ()
 571                 {
 572                         BoundColumn b = new BoundColumn ();
 573                         if (IsTrackingViewState) {
 574                                 IStateManager m = (IStateManager) b;
 575                                 m.TrackViewState ();
 576                         }
 577                         b.Set_Owner (this);
 578                         b.HeaderText = "Item";
 579                         b.SortExpression = "Item";
 580                         b.DataField  = BoundColumn.thisExpr;
 581                         DataSourceColumns.Add (b);
 582                 }
 583
 584                 private void AddPropertyToColumns (PropertyDescriptor prop, bool tothis)
 585                 {
 586                         BoundColumn b = new BoundColumn ();
 587                         b.Set_Owner (this);
 588                         if (IsTrackingViewState) {
 589                                 IStateManager m = (IStateManager) b;
 590                                 m.TrackViewState ();
 591                         }
 592                         b.HeaderText = prop.Name;
 593                         b.DataField = (tothis ? BoundColumn.thisExpr : prop.Name);
 594                         b.SortExpression = prop.Name;
 595                         DataSourceColumns.Add (b);
 596                 }
 597
 598                 protected override void TrackViewState ()
 599                 {
 600                         base.TrackViewState ();
 601
 602                         if (pager_style != null)
 603                                 pager_style.TrackViewState ();
 604                         if (header_style != null)
 605                                 header_style.TrackViewState ();
 606                         if (footer_style != null)
 607                                 footer_style.TrackViewState ();
 608                         if (item_style != null)
 609                                 item_style.TrackViewState ();
 610                         if (alt_item_style != null)
 611                                 alt_item_style.TrackViewState ();
 612                         if (selected_style != null)
 613                                 selected_style.TrackViewState ();
 614                         if (edit_item_style != null)
 615                                 edit_item_style.TrackViewState ();
 616
 617                         IStateManager manager = (IStateManager) columns;
 618                         if (manager != null)
 619                                 manager.TrackViewState ();
 620                 }
 621
 622                 protected override object SaveViewState ()
 623                 {
 624                         object [] res = new object [10];
 625
 626                         res [0] = base.SaveViewState ();
 627                         if (columns != null) {
 628                                 IStateManager cm = (IStateManager) columns;
 629                                 res [1] = cm.SaveViewState ();
 630                         }
 631                         if (pager_style != null)
 632                                 res [2] = pager_style.SaveViewState ();
 633                         if (header_style != null)
 634                                 res [3] = header_style.SaveViewState ();
 635                         if (footer_style != null)
 636                                 res [4] = footer_style.SaveViewState ();
 637                         if (item_style != null)
 638                                 res [5] = item_style.SaveViewState ();
 639                         if (alt_item_style != null)
 640                                 res [6] = alt_item_style.SaveViewState ();
 641                         if (selected_style != null)
 642                                 res [7] = selected_style.SaveViewState ();
 643                         if (edit_item_style != null)
 644                                 res [8] = edit_item_style.SaveViewState ();
 645
 646                         if (data_source_columns != null) {
 647                                 IStateManager m = (IStateManager) data_source_columns;
 648                                 res [9] = m.SaveViewState ();
 649                         }
 650
 651                         return res;
 652                 }
 653
 654                 protected override void LoadViewState (object savedState)
 655                 {
 656                         object [] pieces = savedState as object [];
 657
 658                         if (pieces == null)
 659                                 return;
 660
 661                         base.LoadViewState (pieces [0]);
 662                         if (columns != null) {
 663                                 IStateManager cm = (IStateManager) columns;
 664                                 cm.LoadViewState (pieces [1]);
 665                         }
 666                         if (pieces [2] != null)
 667                                 PagerStyle.LoadViewState (pieces [2]);
 668                         if (pieces [3] != null)
 669                                 HeaderStyle.LoadViewState (pieces [3]);
 670                         if (pieces [4] != null)
 671                                 FooterStyle.LoadViewState (pieces [4]);
 672                         if (pieces [5] != null)
 673                                 ItemStyle.LoadViewState (pieces [5]);
 674                         if (pieces [6] != null)
 675                                 AlternatingItemStyle.LoadViewState (pieces [6]);
 676                         if (pieces [7] != null)
 677                                 SelectedItemStyle.LoadViewState (pieces [7]);
 678                         if (pieces [8] != null)
 679                                 EditItemStyle.LoadViewState (pieces [8]);
 680
 681                         if (pieces [9] != null) {
 682                                 // IStateManager manager = (IStateManager) DataSourceColumns;
 683                                 // manager.LoadViewState (pieces [9]);
 684                                 object [] cols = (object []) pieces [9];
 685                                 foreach (object o in cols) {
 686                                         BoundColumn c = new BoundColumn ();
 687                                         c.Set_Owner (this);
 688                                         ((IStateManager) c).LoadViewState (o);
 689                                         DataSourceColumns.Add (c);
 690                                 }
 691                         }
 692                 }
 693
 694                 protected override Style CreateControlStyle ()
 695                 {
 696                         TableStyle res = new TableStyle (ViewState);
 697                         res.GridLines = GridLines.Both;
 698                         res.CellSpacing = 0;
 699                         return res;
 700                 }
 701
 702                 protected virtual void InitializeItem (DataGridItem item, DataGridColumn [] columns)
 703                 {
 704                         bool th = UseAccessibleHeader && item.ItemType == ListItemType.Header;
 705                         for (int i = 0; i < columns.Length; i++) {
 706                                 TableCell cell = (th) ? new TableHeaderCell () : new TableCell ();
 707                                 columns [i].InitializeCell (cell, i, item.ItemType);
 708                                 item.Cells.Add (cell);
 709                         }
 710                 }
 711
 712                 protected virtual void InitializePager (DataGridItem item, int columnSpan, PagedDataSource pagedDataSource)
 713                 {
 714                         TableCell pager_cell;
 715                         if (PagerStyle.Mode == PagerMode.NextPrev)
 716                                 pager_cell = InitializeNextPrevPager (item, columnSpan, pagedDataSource);
 717                         else
 718                                 pager_cell = InitializeNumericPager (item, columnSpan, pagedDataSource);
 719
 720                         item.Controls.Add (pager_cell);
 721                 }
 722
 723                 private TableCell InitializeNumericPager (DataGridItem item, int columnSpan,
 724                                 PagedDataSource paged)
 725                 {
 726                         TableCell res = new TableCell ();
 727                         res.ColumnSpan = columnSpan;
 728
 729                         int button_count = PagerStyle.PageButtonCount;
 730                         int current = paged.CurrentPageIndex;
 731                         int start = current - (current % button_count);
 732                         int end = start + button_count;
 733
 734                         if (end > paged.PageCount)
 735                                 end = paged.PageCount;
 736
 737                         if (start > 0) {
 738                                 LinkButton link = new LinkButton ();
 739                                 link.Text = "...";
 740                                 link.CommandName = PageCommandName;
 741                                 link.CommandArgument = start.ToString (CultureInfo.InvariantCulture);
 742                                 link.CausesValidation = false;
 743                                 res.Controls.Add (link);
 744                                 res.Controls.Add (new LiteralControl ("&nbsp;"));
 745                         }
 746
 747                         for (int i = start; i < end; i++) {
 748                                 Control number = null;
 749                                 string page = (i + 1).ToString (CultureInfo.InvariantCulture);
 750                                 if (i != paged.CurrentPageIndex) {
 751                                         LinkButton link = new LinkButton ();
 752                                         link.Text = page;
 753                                         link.CommandName = PageCommandName;
 754                                         link.CommandArgument = page;
 755                                         link.CausesValidation = false;
 756                                         number = link;
 757                                 } else {
 758                                         Label pageLabel = new Label();
 759                                         pageLabel.Text = page;
 760                                         number = pageLabel;
 761                                 }
 762
 763                                 res.Controls.Add (number);
 764                                 if (i < end - 1)
 765                                         res.Controls.Add (new LiteralControl ("&nbsp;"));
 766                         }
 767
 768                         if (end < paged.PageCount) {
 769                                 res.Controls.Add (new LiteralControl ("&nbsp;"));
 770                                 LinkButton link = new LinkButton ();
 771                                 link.Text = "...";
 772                                 link.CommandName = PageCommandName;
 773                                 link.CommandArgument = (end + 1).ToString (CultureInfo.InvariantCulture);
 774                                 link.CausesValidation = false;
 775                                 res.Controls.Add (link);
 776                         }
 777
 778                         return res;
 779                 }
 780
 781                 private TableCell InitializeNextPrevPager (DataGridItem item, int columnSpan, PagedDataSource paged)
 782                 {
 783                         TableCell res = new TableCell ();
 784                         res.ColumnSpan = columnSpan;
 785
 786                         Control prev;
 787                         Control next;
 788
 789                         if (paged.IsFirstPage) {
 790                                 Label l = new Label ();
 791                                 l.Text = PagerStyle.PrevPageText;
 792                                 prev = l;
 793                         } else {
 794                                 LinkButton l = new LinkButton ();
 795                                 l.Text = PagerStyle.PrevPageText;
 796                                 l.CommandName = PageCommandName;
 797                                 l.CommandArgument = PrevPageCommandArgument;
 798                                 l.CausesValidation = false;
 799                                 prev = l;
 800                         }
 801
 802                         if (paged.Count > 0 && !paged.IsLastPage) {
 803                                 LinkButton l = new LinkButton ();
 804                                 l.Text = PagerStyle.NextPageText;
 805                                 l.CommandName = PageCommandName;
 806                                 l.CommandArgument = NextPageCommandArgument;
 807                                 l.CausesValidation = false;
 808                                 next = l;
 809                         } else {
 810                                 Label l = new Label ();
 811                                 l.Text = PagerStyle.NextPageText;
 812                                 next = l;
 813                         }
 814
 815                         res.Controls.Add (prev);
 816                         res.Controls.Add (new LiteralControl ("&nbsp;"));
 817                         res.Controls.Add (next);
 818
 819                         return res;
 820                 }
 821
 822                 protected virtual DataGridItem CreateItem (int itemIndex, int dataSourceIndex,
 823                                 ListItemType itemType)
 824                 {
 825                         DataGridItem res = new DataGridItem (itemIndex, dataSourceIndex, itemType);
 826                         return res;
 827                 }
 828
 829                 private DataGridItem CreateItem (int item_index, int data_source_index,
 830                                 ListItemType type, bool data_bind, object data_item,
 831                                 PagedDataSource paged)
 832                 {
 833                         DataGridItem res = CreateItem (item_index, data_source_index, type);
 834                         DataGridItemEventArgs args = new DataGridItemEventArgs (res);
 835                         bool no_pager = (type != ListItemType.Pager);
 836
 837                         if (no_pager) {
 838                                 InitializeItem (res, render_columns);
 839                                 if (data_bind)
 840                                         res.DataItem = data_item;
 841                                 OnItemCreated (args);
 842                         } else {
 843                                 InitializePager (res, render_columns.Length, paged);
 844                                 if (pager_style != null)
 845                                         res.ApplyStyle (pager_style);
 846                                 OnItemCreated (args);
 847                         }
 848
 849                         // Add before the column is bound, so that the
 850                         // value is saved in the viewstate
 851                         RenderTable.Controls.Add (res);
 852
 853                         if (no_pager && data_bind) {
 854                                 res.DataBind ();
 855                                 OnItemDataBound (args);
 856                                 res.DataItem = null;
 857                         }
 858                         return res;
 859                 }
 860
 861                 class NCollection : ICollection {
 862                         int n;
 863 #if TARGET_JVM
 864                         class SequenceEnumerator : IEnumerator {
 865                                 readonly int _max;
 866                                 object _current;
 867                                 public SequenceEnumerator(int max) {
 868                                         _max = max;
 869                                         Reset();
 870                                 }
 871
 872                                 public bool MoveNext() {
 873                                         _current = (int)_current + 1;
 874                                         return (int)_current >= 0 && (int)_current < _max;
 875                                 }
 876
 877                                 public void Reset() {
 878                                         _current = -1;
 879                                 }
 880
 881                                 public object Current {
 882                                         get { return _current; }
 883                                 }
 884                         }
 885 #endif
 886
 887                         public NCollection (int n)
 888                         {
 889                                 this.n = n;
 890                         }
 891
 892                         public IEnumerator GetEnumerator ()
 893                         {
 894 #if TARGET_JVM
 895                                 return new SequenceEnumerator(n);
 896 #else
 897                                 for (int i = 0; i < n; i++)
 898                                         yield return i;
 899 #endif
 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
 925                         IEnumerable data_source;
 926                         ArrayList keys = null;
 927                         if (useDataSource) {
 928                                 data_source = DataSourceResolver.ResolveDataSource (DataSource, DataMember);
 929                                 keys = DataKeysArray;
 930                                 keys.Clear ();
 931                         } else {
 932                                 int nitems = ViewState.GetInt ("Items", 0);
 933                                 data_source = new NCollection (nitems);
 934                         }
 935
 936                         paged_data_source = new PagedDataSource ();
 937                         PagedDataSource pds = paged_data_source;
 938                         pds.AllowPaging = AllowPaging;
 939                         pds.AllowCustomPaging = AllowCustomPaging;
 940                         pds.DataSource = data_source;
 941                         pds.CurrentPageIndex = CurrentPageIndex;
 942                         pds.PageSize = PageSize;
 943                         pds.VirtualCount = VirtualItemCount;
 944
 945                         if ((pds.IsPagingEnabled) && (pds.PageCount < pds.CurrentPageIndex))
 946                                 throw new HttpException ("Invalid DataGrid PageIndex");
 947
 948                         CreateRenderColumns (paged_data_source, useDataSource);
 949                         if (useDataSource) {
 950                                 if (DataSource != null)
 951                                         Controls.Add (RenderTable);
 952                         } else {
 953                                 Controls.Add (RenderTable);
 954                         }
 955
 956                         if (pds.IsPagingEnabled)
 957                                 CreateItem (-1, -1, ListItemType.Pager, false, null, pds);
 958
 959                         CreateItem (-1, -1, ListItemType.Header, useDataSource, null, pds);
 960
 961                         // No indexer on PagedDataSource so we have to do
 962                         // this silly foreach and index++
 963                         if (items_list == null)
 964                                 items_list = new ArrayList ();
 965                         else
 966                                 items_list.Clear();
 967
 968                         bool skip_first = false;
 969                         IEnumerator enumerator = null;
 970                         if (data_enumerator != null) {
 971                                 // replaced when creating bound columns
 972                                 enumerator = data_enumerator;
 973                                 skip_first = true;
 974                         } else if (pds.DataSource != null) {
 975                                 enumerator = pds.GetEnumerator ();
 976                         } else {
 977                                 enumerator = null;
 978                         }
 979
 980                         int index = 0;
 981                         bool first = true;
 982                         string key = null;
 983                         int dataset_index = pds.FirstIndexInPage;
 984                         int selected_index = SelectedIndex;
 985                         int edit_item_index = EditItemIndex;
 986                         while (enumerator != null && (skip_first || enumerator.MoveNext ())) {
 987                                 // MS does not render <table blah></table> on empty datasource.
 988                                 if (first) {
 989                                         first = false;
 990                                         key = DataKeyField;
 991                                         skip_first = false;
 992                                 }
 993                                 object data = enumerator.Current;
 994                                 // This will throw if the DataKeyField is not there. As on MS, this
 995                                 // will not be hit on an empty datasource.
 996                                 // The values stored here can be used in events so that you can
 997                                 // get, for example, the row that was clicked
 998                                 // (data.Rows.Find (ItemsGrid.DataKeys [e.Item.ItemIndex]))
 999                                 // BaseDataList will keep the array across postbacks.
1000                                 if (useDataSource && key != "")
1001                                         keys.Add (DataBinder.GetPropertyValue (data, key));
1002
1003                                 ListItemType type = ListItemType.Item;
1004                                 if (index == edit_item_index)
1005                                         type = ListItemType.EditItem;
1006                                 else if (index == selected_index)
1007                                         type = ListItemType.SelectedItem;
1008                                 else if (index % 2 != 0)
1009                                         type = ListItemType.AlternatingItem;
1010
1011                                 items_list.Add (CreateItem (index, dataset_index, type, useDataSource, data, pds));
1012                                 index++;
1013                                 dataset_index++;
1014                         }
1015
1016                         CreateItem (-1, -1, ListItemType.Footer, useDataSource, null, paged_data_source);
1017                         if (pds.IsPagingEnabled) {
1018                                 CreateItem (-1, -1, ListItemType.Pager, false, null, paged_data_source);
1019                                 if (useDataSource)
1020                                         ViewState ["Items"] = pds.IsCustomPagingEnabled ? index : pds.DataSourceCount;
1021                         } else if (useDataSource) {
1022                                 ViewState ["Items"] = index;
1023                         }
1024                 }
1025
1026                 void ApplyColumnStyle (TableCellCollection cells, ListItemType type)
1027                 {
1028                         int ncells = Math.Min (cells.Count, render_columns.Length);
1029                         if (ncells <= 0)
1030                                 return;
1031
1032                         for (int i = 0; i < ncells; i++) {
1033                                 Style style = null;
1034                                 TableCell cell = cells [i];
1035                                 DataGridColumn column = render_columns [i];
1036                                 if (!column.Visible) {
1037                                         cell.Visible = false;
1038                                         continue;
1039                                 }
1040
1041                                 style = column.GetStyle (type);
1042                                 if (style != null)
1043                                         cell.MergeStyle (style);
1044                         }
1045                 }
1046
1047                 protected override void PrepareControlHierarchy ()
1048                 {
1049                         if (!HasControls () || Controls.Count == 0)
1050                                 return; // No one called CreateControlHierarchy() with DataSource != null
1051
1052                         Table rt = render_table;
1053                         rt.CopyBaseAttributes (this);
1054                         rt.ApplyStyle (ControlStyle);
1055
1056                         rt.Caption = Caption;
1057                         rt.CaptionAlign = CaptionAlign;
1058                         rt.Enabled = Enabled;
1059
1060                         bool top_pager = true;
1061                         Style alt = null;
1062                         foreach (DataGridItem item in rt.Rows) {
1063
1064                                 switch (item.ItemType) {
1065                                 case ListItemType.Item:
1066                                         item.MergeStyle (item_style);
1067                                         ApplyColumnStyle (item.Cells, ListItemType.Item);
1068                                         break;
1069                                 case ListItemType.AlternatingItem:
1070                                         if (alt == null) {
1071                                                 if (alt_item_style != null) {
1072                                                         alt = new TableItemStyle ();
1073                                                         alt.CopyFrom (item_style);
1074                                                         alt.CopyFrom (alt_item_style);
1075                                                 } else {
1076                                                         alt = item_style;
1077                                                 }
1078                                         }
1079
1080                                         item.MergeStyle (alt);
1081                                         ApplyColumnStyle (item.Cells, ListItemType.AlternatingItem);
1082                                         break;
1083                                 case ListItemType.EditItem:
1084                                         item.MergeStyle (edit_item_style);
1085                                         ApplyColumnStyle (item.Cells, ListItemType.EditItem);
1086                                         break;
1087                                 case ListItemType.Footer:
1088                                         if (!ShowFooter) {
1089                                                 item.Visible = false;
1090                                                 break;
1091                                         }
1092                                         if (footer_style != null)
1093                                                 item.MergeStyle (footer_style);
1094                                         ApplyColumnStyle (item.Cells, ListItemType.Footer);
1095                                         break;
1096                                 case ListItemType.Header:
1097                                         if (!ShowHeader) {
1098                                                 item.Visible = false;
1099                                                 break;
1100                                         }
1101                                         if (header_style != null)
1102                                                 item.MergeStyle (header_style);
1103                                         ApplyColumnStyle (item.Cells, ListItemType.Header);
1104                                         break;
1105                                 case ListItemType.SelectedItem:
1106                                         if (selected_style != null)
1107                                                 item.MergeStyle (selected_style);
1108                                         else
1109                                                 item.MergeStyle (item_style);
1110                                         ApplyColumnStyle (item.Cells, ListItemType.SelectedItem);
1111                                         break;
1112                                 case ListItemType.Separator:
1113                                         ApplyColumnStyle (item.Cells, ListItemType.Separator);
1114                                         break;
1115                                 case ListItemType.Pager:
1116                                         DataGridPagerStyle ps = PagerStyle;
1117                                         if (ps.Visible == false || !paged_data_source.IsPagingEnabled) {
1118                                                 item.Visible = false;
1119                                         } else {
1120                                                 if (top_pager)
1121                                                         item.Visible = (ps.Position != PagerPosition.Bottom);
1122                                                 else
1123                                                         item.Visible = (ps.Position != PagerPosition.Top);
1124                                                 top_pager = false;
1125                                         }
1126
1127                                         if (item.Visible)
1128                                                 item.MergeStyle (pager_style);
1129                                         break;
1130                                 }
1131                         }
1132                 }
1133
1134                 protected override bool OnBubbleEvent (object source, EventArgs e)
1135                 {
1136                         DataGridCommandEventArgs de = e as DataGridCommandEventArgs;
1137
1138                         if (de == null)
1139                                 return false;
1140
1141                         string cn = de.CommandName;
1142                         CultureInfo inv = CultureInfo.InvariantCulture;
1143
1144                         OnItemCommand (de);
1145                         if (String.Compare (cn, CancelCommandName, true, inv) == 0) {
1146                                 OnCancelCommand (de);
1147                         } else if (String.Compare (cn, DeleteCommandName, true, inv) == 0) {
1148                                 OnDeleteCommand (de);
1149                         } else if (String.Compare (cn, EditCommandName, true, inv) == 0) {
1150                                 OnEditCommand (de);
1151                         } else if (String.Compare (cn, SelectCommandName, true, inv) == 0) {
1152                                 SelectedIndex = de.Item.ItemIndex;
1153                                 OnSelectedIndexChanged (de);
1154                         } else if (String.Compare (cn, SortCommandName, true, inv) == 0) {
1155                                 DataGridSortCommandEventArgs se = new DataGridSortCommandEventArgs (de.CommandSource, de);
1156                                 OnSortCommand (se);
1157                         } else if (String.Compare (cn, UpdateCommandName, true, inv) == 0) {
1158                                 OnUpdateCommand (de);
1159                         } else if (String.Compare (cn, PageCommandName, true, inv) == 0) {
1160                                 int new_index;
1161                                 if (String.Compare ((string) de.CommandArgument,
1162                                                     NextPageCommandArgument, true, inv) == 0) {
1163                                         new_index = CurrentPageIndex + 1;
1164                                 } else if (String.Compare ((string) de.CommandArgument,
1165                                                            PrevPageCommandArgument, true, inv) == 0) {
1166                                         new_index = CurrentPageIndex - 1;
1167                                 } else {
1168                                         // It seems to just assume it's an int and parses, no
1169                                         // checks to make sure its valid or anything.
1170                                         //  also it's always one less then specified, not sure
1171                                         // why that is.
1172                                         new_index = Int32.Parse ((string) de.CommandArgument, inv) - 1;
1173                                 }
1174                                 DataGridPageChangedEventArgs pc = new DataGridPageChangedEventArgs (
1175                                         de.CommandSource, new_index);
1176                                 OnPageIndexChanged (pc);
1177                         }
1178
1179                         return true;
1180                 }
1181
1182                 protected virtual void OnCancelCommand (DataGridCommandEventArgs e)
1183                 {
1184                         DataGridCommandEventHandler handler = (DataGridCommandEventHandler) Events [CancelCommandEvent];
1185                         if (handler != null)
1186                                 handler (this, e);
1187                 }
1188
1189                 protected virtual void OnDeleteCommand (DataGridCommandEventArgs e)
1190                 {
1191                         DataGridCommandEventHandler handler = (DataGridCommandEventHandler) Events [DeleteCommandEvent];
1192                         if (handler != null)
1193                                 handler (this, e);
1194                 }
1195
1196                 protected virtual void OnEditCommand (DataGridCommandEventArgs e)
1197                 {
1198                         DataGridCommandEventHandler handler = (DataGridCommandEventHandler) Events [EditCommandEvent];
1199                         if (handler != null)
1200                                 handler (this, e);
1201                 }
1202
1203                 protected virtual void OnItemCommand (DataGridCommandEventArgs e)
1204                 {
1205                         DataGridCommandEventHandler handler = (DataGridCommandEventHandler) Events [ItemCommandEvent];
1206                         if (handler != null)
1207                                 handler (this, e);
1208                 }
1209
1210                 protected virtual void OnItemCreated (DataGridItemEventArgs e)
1211                 {
1212                         DataGridItemEventHandler handler = (DataGridItemEventHandler) Events [ItemCreatedEvent];
1213                         if (handler != null)
1214                                 handler (this, e);
1215                 }
1216
1217                 protected virtual void OnItemDataBound (DataGridItemEventArgs e)
1218                 {
1219                         DataGridItemEventHandler handler = (DataGridItemEventHandler) Events [ItemDataBoundEvent];
1220                         if (handler != null)
1221                                 handler (this, e);
1222                 }
1223
1224                 protected virtual void OnPageIndexChanged (DataGridPageChangedEventArgs e)
1225                 {
1226                         DataGridPageChangedEventHandler handler = (DataGridPageChangedEventHandler) Events [PageIndexChangedEvent];
1227                         if (handler != null)
1228                                 handler (this, e);
1229                 }
1230
1231                 protected virtual void OnSortCommand (DataGridSortCommandEventArgs e)
1232                 {
1233                         DataGridSortCommandEventHandler handler = (DataGridSortCommandEventHandler) Events [SortCommandEvent];
1234                         if (handler != null)
1235                                 handler (this, e);
1236                 }
1237
1238                 protected virtual void OnUpdateCommand (DataGridCommandEventArgs e)
1239                 {
1240                         DataGridCommandEventHandler handler = (DataGridCommandEventHandler) Events [UpdateCommandEvent];
1241                         if (handler != null)
1242                                 handler (this, e);
1243                 }
1244
1245                 [WebSysDescription ("")]
1246                 [WebCategory ("Action")]
1247                 public event DataGridCommandEventHandler CancelCommand {
1248                         add { Events.AddHandler (CancelCommandEvent, value); }
1249                         remove { Events.RemoveHandler (CancelCommandEvent, value); }
1250                 }
1251
1252                 [WebSysDescription ("")]
1253                 [WebCategory ("Action")]
1254                 public event DataGridCommandEventHandler DeleteCommand {
1255                         add { Events.AddHandler (DeleteCommandEvent, value); }
1256                         remove { Events.RemoveHandler (DeleteCommandEvent, value); }
1257                 }
1258
1259                 [WebSysDescription ("")]
1260                 [WebCategory ("Action")]
1261                 public event DataGridCommandEventHandler EditCommand {
1262                         add { Events.AddHandler (EditCommandEvent, value); }
1263                         remove { Events.RemoveHandler (EditCommandEvent, value); }
1264                 }
1265
1266                 [WebSysDescription ("")]
1267                 [WebCategory ("Action")]
1268                 public event DataGridCommandEventHandler ItemCommand {
1269                         add { Events.AddHandler (ItemCommandEvent, value); }
1270                         remove { Events.RemoveHandler (ItemCommandEvent, value); }
1271
1272                 }
1273
1274                 [WebSysDescription ("")]
1275                 [WebCategory ("Action")]
1276                 public event DataGridItemEventHandler ItemCreated {
1277                         add { Events.AddHandler (ItemCreatedEvent, value); }
1278                         remove { Events.RemoveHandler (ItemCreatedEvent, value); }
1279                 }
1280
1281                 [WebSysDescription ("")]
1282                 [WebCategory ("Action")]
1283                 public event DataGridItemEventHandler ItemDataBound {
1284                         add { Events.AddHandler (ItemDataBoundEvent, value); }
1285                         remove { Events.RemoveHandler (ItemDataBoundEvent, value); }
1286                 }
1287
1288                 [WebSysDescription ("")]
1289                 [WebCategory ("Action")]
1290                 public event DataGridPageChangedEventHandler PageIndexChanged {
1291                         add { Events.AddHandler (PageIndexChangedEvent, value); }
1292                         remove { Events.RemoveHandler (PageIndexChangedEvent, value); }
1293                 }
1294
1295                 [WebSysDescription ("")]
1296                 [WebCategory ("Action")]
1297                 public event DataGridSortCommandEventHandler SortCommand {
1298                         add { Events.AddHandler (SortCommandEvent, value); }
1299                         remove { Events.RemoveHandler (SortCommandEvent, value); }
1300                 }
1301
1302                 [WebSysDescription ("")]
1303                 [WebCategory ("Action")]
1304                 public event DataGridCommandEventHandler UpdateCommand {
1305                         add { Events.AddHandler (UpdateCommandEvent, value); }
1306                         remove { Events.AddHandler (UpdateCommandEvent, value); }
1307                 }
1308         }
1309 }
1310