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                 [Browsable(false)]
 445                 [DesignerSerializationVisibility(DesignerSerializationVisibility.Hidden)]
 446                 [WebSysDescription ("")]
 447                 [WebCategory ("Paging")]
 448                 public virtual DataGridItem SelectedItem {
 449                         get {
 450                                 if (SelectedIndex == -1)
 451                                         return null;
 452                                 return Items [SelectedIndex];
 453                         }
 454                 }
 455
 456 #if ONLY_1_1
 457                 [Bindable(true)]
 458 #endif
 459                 [DefaultValue(false)]
 460                 [WebSysDescription ("")]
 461                 [WebCategory ("Appearance")]
 462                 public virtual bool ShowFooter {
 463                         get { return ViewState.GetBool ("ShowFooter", false); }
 464                         set { ViewState ["ShowFooter"] = value; }
 465                 }
 466
 467 #if ONLY_1_1
 468                 [Bindable(true)]
 469 #endif
 470                 [DefaultValue(true)]
 471                 [WebSysDescription ("")]
 472                 [WebCategory ("Appearance")]
 473                 public virtual bool ShowHeader {
 474                         get { return ViewState.GetBool ("ShowHeader", true); }
 475                         set { ViewState ["ShowHeader"] = value; }
 476                 }
 477
 478                 [Browsable(false)]
 479                 [DesignerSerializationVisibility(DesignerSerializationVisibility.Hidden)]
 480                 [WebSysDescription ("")]
 481                 [WebCategory ("Appearance")]
 482                 public virtual int VirtualItemCount {
 483                         get { return ViewState.GetInt ("VirtualItemCount", 0); }
 484                         set {
 485                                 if (value < 0)
 486                                         throw new ArgumentOutOfRangeException ("value");
 487                                 ViewState ["VirtualItemCount"] = value;
 488                         }
 489                 }
 490
 491 #if NET_2_0
 492                 protected override HtmlTextWriterTag TagKey {
 493                         get { return HtmlTextWriterTag.Table; }
 494                 }
 495 #endif
 496
 497                 private TableStyle TableStyle {
 498                         get { return (TableStyle) ControlStyle; }
 499                 }
 500
 501                 static Type [] item_args = new Type [] {typeof (int) };
 502                 void AddColumnsFromSource (PagedDataSource data_source)
 503                 {
 504                         PropertyDescriptorCollection props = null;
 505                         Type ptype = null;
 506                         bool no_items = false;
 507
 508                         // Use plain reflection for the Item property.
 509                         // If we use TypeDescriptor, props will hold
 510                         // all of the Type properties, which will be listed as columns
 511                         Type ds_type = data_source.GetType ();
 512                         PropertyInfo pinfo = ds_type.GetProperty ("Item", item_args);
 513                         if (pinfo == null) {
 514                                 IEnumerator items = (data_source.DataSource != null) ? data_source.GetEnumerator () : null;
 515                                 if (items != null && items.MoveNext ()) {
 516                                         object data = items.Current;
 517                                         if ((data is ICustomTypeDescriptor) || (!IsBindableType(data.GetType())))
 518                                                 props = TypeDescriptor.GetProperties (data);
 519                                         else if (data != null)
 520                                                 ptype = data.GetType ();
 521                                         data_enumerator = items;
 522                                 } else {
 523                                         no_items = true;
 524                                 }
 525                         } else {
 526                                 ptype = pinfo.PropertyType;
 527                         }
 528
 529                         if (ptype != null) {
 530                                 // Found the "Item" property
 531                                 AddPropertyToColumns ();
 532                         } else if (props != null) {
 533                                 foreach (PropertyDescriptor pd in props)
 534                                         AddPropertyToColumns (pd, false);
 535                         } else if (!no_items) {
 536                                 // This is not thrown for an empty ArrayList.
 537                                 string msg = String.Format ("DataGrid '{0}' cannot autogenerate " +
 538                                                         "columns from the given datasource. {1}", ID, ptype);
 539                                 throw new HttpException (msg);
 540                         }
 541                 }
 542
 543                 protected virtual ArrayList CreateColumnSet (PagedDataSource dataSource, bool useDataSource)
 544                 {
 545                         ArrayList res = new ArrayList ();
 546                         if (columns_list != null)
 547                                 res.AddRange (columns_list);
 548
 549                         if (AutoGenerateColumns) {
 550                                 if (useDataSource) {
 551                                         data_enumerator = null;
 552                                         PropertyDescriptorCollection props = dataSource.GetItemProperties (null);
 553                                         DataSourceColumns.Clear ();
 554                                         if (props != null) {
 555                                                 foreach (PropertyDescriptor d in props)
 556                                                         AddPropertyToColumns (d, false);
 557                                         } else {
 558                                                 AddColumnsFromSource (dataSource);
 559                                         }
 560                                 }
 561
 562                                 if (data_source_columns != null && data_source_columns.Count > 0)
 563                                         res.AddRange (data_source_columns);
 564                         }
 565
 566                         return res;
 567                 }
 568
 569                 private void AddPropertyToColumns ()
 570                 {
 571                         BoundColumn b = new BoundColumn ();
 572                         if (IsTrackingViewState) {
 573                                 IStateManager m = (IStateManager) b;
 574                                 m.TrackViewState ();
 575                         }
 576                         b.Set_Owner (this);
 577                         b.HeaderText = "Item";
 578                         b.SortExpression = "Item";
 579                         b.DataField  = BoundColumn.thisExpr;
 580                         DataSourceColumns.Add (b);
 581                 }
 582
 583                 private void AddPropertyToColumns (PropertyDescriptor prop, bool tothis)
 584                 {
 585                         BoundColumn b = new BoundColumn ();
 586                         b.Set_Owner (this);
 587                         if (IsTrackingViewState) {
 588                                 IStateManager m = (IStateManager) b;
 589                                 m.TrackViewState ();
 590                         }
 591                         b.HeaderText = prop.Name;
 592                         b.DataField = (tothis ? BoundColumn.thisExpr : prop.Name);
 593                         b.SortExpression = prop.Name;
 594                         DataSourceColumns.Add (b);
 595                 }
 596
 597                 protected override void TrackViewState ()
 598                 {
 599                         base.TrackViewState ();
 600
 601                         if (pager_style != null)
 602                                 pager_style.TrackViewState ();
 603                         if (header_style != null)
 604                                 header_style.TrackViewState ();
 605                         if (footer_style != null)
 606                                 footer_style.TrackViewState ();
 607                         if (item_style != null)
 608                                 item_style.TrackViewState ();
 609                         if (alt_item_style != null)
 610                                 alt_item_style.TrackViewState ();
 611                         if (selected_style != null)
 612                                 selected_style.TrackViewState ();
 613                         if (edit_item_style != null)
 614                                 edit_item_style.TrackViewState ();
 615
 616                         IStateManager manager = (IStateManager) columns;
 617                         if (manager != null)
 618                                 manager.TrackViewState ();
 619                 }
 620
 621                 protected override object SaveViewState ()
 622                 {
 623                         object [] res = new object [10];
 624
 625                         res [0] = base.SaveViewState ();
 626                         if (columns != null) {
 627                                 IStateManager cm = (IStateManager) columns;
 628                                 res [1] = cm.SaveViewState ();
 629                         }
 630                         if (pager_style != null)
 631                                 res [2] = pager_style.SaveViewState ();
 632                         if (header_style != null)
 633                                 res [3] = header_style.SaveViewState ();
 634                         if (footer_style != null)
 635                                 res [4] = footer_style.SaveViewState ();
 636                         if (item_style != null)
 637                                 res [5] = item_style.SaveViewState ();
 638                         if (alt_item_style != null)
 639                                 res [6] = alt_item_style.SaveViewState ();
 640                         if (selected_style != null)
 641                                 res [7] = selected_style.SaveViewState ();
 642                         if (edit_item_style != null)
 643                                 res [8] = edit_item_style.SaveViewState ();
 644
 645                         if (data_source_columns != null) {
 646                                 IStateManager m = (IStateManager) data_source_columns;
 647                                 res [9] = m.SaveViewState ();
 648                         }
 649
 650                         return res;
 651                 }
 652
 653                 protected override void LoadViewState (object savedState)
 654                 {
 655                         object [] pieces = savedState as object [];
 656
 657                         if (pieces == null)
 658                                 return;
 659
 660                         base.LoadViewState (pieces [0]);
 661                         if (columns != null) {
 662                                 IStateManager cm = (IStateManager) columns;
 663                                 cm.LoadViewState (pieces [1]);
 664                         }
 665                         if (pieces [2] != null)
 666                                 PagerStyle.LoadViewState (pieces [2]);
 667                         if (pieces [3] != null)
 668                                 HeaderStyle.LoadViewState (pieces [3]);
 669                         if (pieces [4] != null)
 670                                 FooterStyle.LoadViewState (pieces [4]);
 671                         if (pieces [5] != null)
 672                                 ItemStyle.LoadViewState (pieces [5]);
 673                         if (pieces [6] != null)
 674                                 AlternatingItemStyle.LoadViewState (pieces [6]);
 675                         if (pieces [7] != null)
 676                                 SelectedItemStyle.LoadViewState (pieces [7]);
 677                         if (pieces [8] != null)
 678                                 EditItemStyle.LoadViewState (pieces [8]);
 679
 680                         if (pieces [9] != null) {
 681                                 // IStateManager manager = (IStateManager) DataSourceColumns;
 682                                 // manager.LoadViewState (pieces [9]);
 683                                 object [] cols = (object []) pieces [9];
 684                                 foreach (object o in cols) {
 685                                         BoundColumn c = new BoundColumn ();
 686                                         c.Set_Owner (this);
 687                                         ((IStateManager) c).LoadViewState (o);
 688                                         DataSourceColumns.Add (c);
 689                                 }
 690                         }
 691                 }
 692
 693                 protected override Style CreateControlStyle ()
 694                 {
 695                         TableStyle res = new TableStyle (ViewState);
 696                         res.GridLines = GridLines.Both;
 697                         res.CellSpacing = 0;
 698                         return res;
 699                 }
 700
 701                 protected virtual void InitializeItem (DataGridItem item, DataGridColumn [] columns)
 702                 {
 703                         bool th = UseAccessibleHeader && item.ItemType == ListItemType.Header;
 704                         for (int i = 0; i < columns.Length; i++) {
 705                                 TableCell cell = null;
 706                                 if (th) {
 707                                         cell = new TableHeaderCell ();
 708                                         cell.Attributes["scope"] = "col";
 709                                 }
 710                                 else
 711                                         cell = new TableCell ();
 712                                 columns [i].InitializeCell (cell, i, item.ItemType);
 713                                 item.Cells.Add (cell);
 714                         }
 715                 }
 716
 717                 protected virtual void InitializePager (DataGridItem item, int columnSpan, PagedDataSource pagedDataSource)
 718                 {
 719                         TableCell pager_cell;
 720                         if (PagerStyle.Mode == PagerMode.NextPrev)
 721                                 pager_cell = InitializeNextPrevPager (item, columnSpan, pagedDataSource);
 722                         else
 723                                 pager_cell = InitializeNumericPager (item, columnSpan, pagedDataSource);
 724
 725                         item.Controls.Add (pager_cell);
 726                 }
 727
 728                 private TableCell InitializeNumericPager (DataGridItem item, int columnSpan,
 729                                 PagedDataSource paged)
 730                 {
 731                         TableCell res = new TableCell ();
 732                         res.ColumnSpan = columnSpan;
 733
 734                         int button_count = PagerStyle.PageButtonCount;
 735                         int current = paged.CurrentPageIndex;
 736                         int start = current - (current % button_count);
 737                         int end = start + button_count;
 738
 739                         if (end > paged.PageCount)
 740                                 end = paged.PageCount;
 741
 742                         if (start > 0) {
 743                                 LinkButton link = new LinkButton ();
 744                                 link.Text = "...";
 745                                 link.CommandName = PageCommandName;
 746                                 link.CommandArgument = start.ToString (CultureInfo.InvariantCulture);
 747                                 link.CausesValidation = false;
 748                                 res.Controls.Add (link);
 749                                 res.Controls.Add (new LiteralControl ("&nbsp;"));
 750                         }
 751
 752                         for (int i = start; i < end; i++) {
 753                                 Control number = null;
 754                                 string page = (i + 1).ToString (CultureInfo.InvariantCulture);
 755                                 if (i != paged.CurrentPageIndex) {
 756                                         LinkButton link = new LinkButton ();
 757                                         link.Text = page;
 758                                         link.CommandName = PageCommandName;
 759                                         link.CommandArgument = page;
 760                                         link.CausesValidation = false;
 761                                         number = link;
 762                                 } else {
 763                                         Label pageLabel = new Label();
 764                                         pageLabel.Text = page;
 765                                         number = pageLabel;
 766                                 }
 767
 768                                 res.Controls.Add (number);
 769                                 if (i < end - 1)
 770                                         res.Controls.Add (new LiteralControl ("&nbsp;"));
 771                         }
 772
 773                         if (end < paged.PageCount) {
 774                                 res.Controls.Add (new LiteralControl ("&nbsp;"));
 775                                 LinkButton link = new LinkButton ();
 776                                 link.Text = "...";
 777                                 link.CommandName = PageCommandName;
 778                                 link.CommandArgument = (end + 1).ToString (CultureInfo.InvariantCulture);
 779                                 link.CausesValidation = false;
 780                                 res.Controls.Add (link);
 781                         }
 782
 783                         return res;
 784                 }
 785
 786                 private TableCell InitializeNextPrevPager (DataGridItem item, int columnSpan, PagedDataSource paged)
 787                 {
 788                         TableCell res = new TableCell ();
 789                         res.ColumnSpan = columnSpan;
 790
 791                         Control prev;
 792                         Control next;
 793
 794                         if (paged.IsFirstPage) {
 795                                 Label l = new Label ();
 796                                 l.Text = PagerStyle.PrevPageText;
 797                                 prev = l;
 798                         } else {
 799                                 LinkButton l = new LinkButton ();
 800                                 l.Text = PagerStyle.PrevPageText;
 801                                 l.CommandName = PageCommandName;
 802                                 l.CommandArgument = PrevPageCommandArgument;
 803                                 l.CausesValidation = false;
 804                                 prev = l;
 805                         }
 806
 807                         if (paged.Count > 0 && !paged.IsLastPage) {
 808                                 LinkButton l = new LinkButton ();
 809                                 l.Text = PagerStyle.NextPageText;
 810                                 l.CommandName = PageCommandName;
 811                                 l.CommandArgument = NextPageCommandArgument;
 812                                 l.CausesValidation = false;
 813                                 next = l;
 814                         } else {
 815                                 Label l = new Label ();
 816                                 l.Text = PagerStyle.NextPageText;
 817                                 next = l;
 818                         }
 819
 820                         res.Controls.Add (prev);
 821                         res.Controls.Add (new LiteralControl ("&nbsp;"));
 822                         res.Controls.Add (next);
 823
 824                         return res;
 825                 }
 826
 827                 protected virtual DataGridItem CreateItem (int itemIndex, int dataSourceIndex,
 828                                 ListItemType itemType)
 829                 {
 830                         DataGridItem res = new DataGridItem (itemIndex, dataSourceIndex, itemType);
 831                         return res;
 832                 }
 833
 834                 private DataGridItem CreateItem (int item_index, int data_source_index,
 835                                 ListItemType type, bool data_bind, object data_item,
 836                                 PagedDataSource paged)
 837                 {
 838                         DataGridItem res = CreateItem (item_index, data_source_index, type);
 839                         DataGridItemEventArgs args = new DataGridItemEventArgs (res);
 840                         bool no_pager = (type != ListItemType.Pager);
 841
 842                         if (no_pager) {
 843                                 InitializeItem (res, render_columns);
 844                                 if (data_bind)
 845                                         res.DataItem = data_item;
 846                                 OnItemCreated (args);
 847                         } else {
 848                                 InitializePager (res, render_columns.Length, paged);
 849                                 if (pager_style != null)
 850                                         res.ApplyStyle (pager_style);
 851                                 OnItemCreated (args);
 852                         }
 853
 854                         // Add before the column is bound, so that the
 855                         // value is saved in the viewstate
 856                         RenderTable.Controls.Add (res);
 857
 858                         if (no_pager && data_bind) {
 859                                 res.DataBind ();
 860                                 OnItemDataBound (args);
 861                                 res.DataItem = null;
 862                         }
 863                         return res;
 864                 }
 865
 866                 class NCollection : ICollection {
 867                         int n;
 868
 869                         public NCollection (int n)
 870                         {
 871                                 this.n = n;
 872                         }
 873
 874                         public IEnumerator GetEnumerator ()
 875                         {
 876                                 for (int i = 0; i < n; i++)
 877                                         yield return i;
 878                         }
 879
 880                         public int Count {
 881                                 get { return n; }
 882                         }
 883
 884                         public bool IsSynchronized {
 885                                 get { return false; }
 886                         }
 887
 888                         public object SyncRoot {
 889                                 get { return this; }
 890                         }
 891
 892                         public void CopyTo (Array array, int index)
 893                         {
 894                                 throw new NotImplementedException ("This should never be called");
 895                         }
 896                 }
 897
 898                 protected override void CreateControlHierarchy (bool useDataSource)
 899                 {
 900                         Controls.Clear ();
 901                         RenderTable.Controls.Clear ();
 902
 903                         IEnumerable data_source;
 904                         ArrayList keys = null;
 905                         if (useDataSource) {
 906                                 data_source = DataSourceResolver.ResolveDataSource (DataSource, DataMember);
 907                                 keys = DataKeysArray;
 908                                 keys.Clear ();
 909                         } else {
 910                                 int nitems = ViewState.GetInt ("Items", 0);
 911                                 data_source = new NCollection (nitems);
 912                         }
 913
 914                         paged_data_source = new PagedDataSource ();
 915                         PagedDataSource pds = paged_data_source;
 916                         pds.AllowPaging = AllowPaging;
 917                         pds.AllowCustomPaging = AllowCustomPaging;
 918                         pds.DataSource = data_source;
 919                         pds.CurrentPageIndex = CurrentPageIndex;
 920                         pds.PageSize = PageSize;
 921                         pds.VirtualCount = VirtualItemCount;
 922
 923                         if ((pds.IsPagingEnabled) && (pds.PageCount < pds.CurrentPageIndex))
 924                                 throw new HttpException ("Invalid DataGrid PageIndex");
 925
 926                         CreateRenderColumns (paged_data_source, useDataSource);
 927                         if (useDataSource) {
 928                                 if (DataSource != null)
 929                                         Controls.Add (RenderTable);
 930                         } else {
 931                                 Controls.Add (RenderTable);
 932                         }
 933
 934                         if (pds.IsPagingEnabled)
 935                                 CreateItem (-1, -1, ListItemType.Pager, false, null, pds);
 936
 937                         CreateItem (-1, -1, ListItemType.Header, useDataSource, null, pds);
 938
 939                         // No indexer on PagedDataSource so we have to do
 940                         // this silly foreach and index++
 941                         if (items_list == null)
 942                                 items_list = new ArrayList ();
 943                         else
 944                                 items_list.Clear();
 945
 946                         bool skip_first = false;
 947                         IEnumerator enumerator = null;
 948                         if (data_enumerator != null) {
 949                                 // replaced when creating bound columns
 950                                 enumerator = data_enumerator;
 951                                 skip_first = true;
 952                         } else if (pds.DataSource != null) {
 953                                 enumerator = pds.GetEnumerator ();
 954                         } else {
 955                                 enumerator = null;
 956                         }
 957
 958                         int index = 0;
 959                         bool first = true;
 960                         string key = null;
 961                         int dataset_index = pds.FirstIndexInPage;
 962                         int selected_index = SelectedIndex;
 963                         int edit_item_index = EditItemIndex;
 964                         while (enumerator != null && (skip_first || enumerator.MoveNext ())) {
 965                                 // MS does not render <table blah></table> on empty datasource.
 966                                 if (first) {
 967                                         first = false;
 968                                         key = DataKeyField;
 969                                         skip_first = false;
 970                                 }
 971                                 object data = enumerator.Current;
 972                                 // This will throw if the DataKeyField is not there. As on MS, this
 973                                 // will not be hit on an empty datasource.
 974                                 // The values stored here can be used in events so that you can
 975                                 // get, for example, the row that was clicked
 976                                 // (data.Rows.Find (ItemsGrid.DataKeys [e.Item.ItemIndex]))
 977                                 // BaseDataList will keep the array across postbacks.
 978                                 if (useDataSource && key != "")
 979                                         keys.Add (DataBinder.GetPropertyValue (data, key));
 980
 981                                 ListItemType type = ListItemType.Item;
 982                                 if (index == edit_item_index)
 983                                         type = ListItemType.EditItem;
 984                                 else if (index == selected_index)
 985                                         type = ListItemType.SelectedItem;
 986                                 else if (index % 2 != 0)
 987                                         type = ListItemType.AlternatingItem;
 988
 989                                 items_list.Add (CreateItem (index, dataset_index, type, useDataSource, data, pds));
 990                                 index++;
 991                                 dataset_index++;
 992                         }
 993
 994                         CreateItem (-1, -1, ListItemType.Footer, useDataSource, null, paged_data_source);
 995                         if (pds.IsPagingEnabled) {
 996                                 CreateItem (-1, -1, ListItemType.Pager, false, null, paged_data_source);
 997                                 if (useDataSource)
 998                                         ViewState ["Items"] = pds.IsCustomPagingEnabled ? index : pds.DataSourceCount;
 999                         } else if (useDataSource) {
1000                                 ViewState ["Items"] = index;
1001                         }
1002                 }
1003
1004                 void ApplyColumnStyle (TableCellCollection cells, ListItemType type)
1005                 {
1006                         int ncells = Math.Min (cells.Count, render_columns.Length);
1007                         if (ncells <= 0)
1008                                 return;
1009
1010                         for (int i = 0; i < ncells; i++) {
1011                                 Style style = null;
1012                                 TableCell cell = cells [i];
1013                                 DataGridColumn column = render_columns [i];
1014                                 if (!column.Visible) {
1015                                         cell.Visible = false;
1016                                         continue;
1017                                 }
1018
1019                                 style = column.GetStyle (type);
1020                                 if (style != null)
1021                                         cell.MergeStyle (style);
1022                         }
1023                 }
1024
1025                 protected override void PrepareControlHierarchy ()
1026                 {
1027                         if (!HasControls () || Controls.Count == 0)
1028                                 return; // No one called CreateControlHierarchy() with DataSource != null
1029
1030                         Table rt = render_table;
1031                         rt.CopyBaseAttributes (this);
1032                         rt.ApplyStyle (ControlStyle);
1033
1034                         rt.Caption = Caption;
1035                         rt.CaptionAlign = CaptionAlign;
1036                         rt.Enabled = Enabled;
1037
1038                         bool top_pager = true;
1039                         Style alt = null;
1040                         foreach (DataGridItem item in rt.Rows) {
1041
1042                                 switch (item.ItemType) {
1043                                 case ListItemType.Item:
1044                                         item.MergeStyle (item_style);
1045                                         ApplyColumnStyle (item.Cells, ListItemType.Item);
1046                                         break;
1047                                 case ListItemType.AlternatingItem:
1048                                         if (alt == null) {
1049                                                 if (alt_item_style != null) {
1050                                                         alt = new TableItemStyle ();
1051                                                         alt.CopyFrom (item_style);
1052                                                         alt.CopyFrom (alt_item_style);
1053                                                 } else {
1054                                                         alt = item_style;
1055                                                 }
1056                                         }
1057
1058                                         item.MergeStyle (alt);
1059                                         ApplyColumnStyle (item.Cells, ListItemType.AlternatingItem);
1060                                         break;
1061                                 case ListItemType.EditItem:
1062                                         item.MergeStyle (edit_item_style);
1063                                         ApplyColumnStyle (item.Cells, ListItemType.EditItem);
1064                                         break;
1065                                 case ListItemType.Footer:
1066                                         if (!ShowFooter) {
1067                                                 item.Visible = false;
1068                                                 break;
1069                                         }
1070                                         if (footer_style != null)
1071                                                 item.MergeStyle (footer_style);
1072                                         ApplyColumnStyle (item.Cells, ListItemType.Footer);
1073                                         break;
1074                                 case ListItemType.Header:
1075                                         if (!ShowHeader) {
1076                                                 item.Visible = false;
1077                                                 break;
1078                                         }
1079                                         if (header_style != null)
1080                                                 item.MergeStyle (header_style);
1081                                         ApplyColumnStyle (item.Cells, ListItemType.Header);
1082                                         break;
1083                                 case ListItemType.SelectedItem:
1084                                         if (selected_style != null)
1085                                                 item.MergeStyle (selected_style);
1086                                         else
1087                                                 item.MergeStyle (item_style);
1088                                         ApplyColumnStyle (item.Cells, ListItemType.SelectedItem);
1089                                         break;
1090                                 case ListItemType.Separator:
1091                                         ApplyColumnStyle (item.Cells, ListItemType.Separator);
1092                                         break;
1093                                 case ListItemType.Pager:
1094                                         DataGridPagerStyle ps = PagerStyle;
1095                                         if (ps.Visible == false || !paged_data_source.IsPagingEnabled) {
1096                                                 item.Visible = false;
1097                                         } else {
1098                                                 if (top_pager)
1099                                                         item.Visible = (ps.Position != PagerPosition.Bottom);
1100                                                 else
1101                                                         item.Visible = (ps.Position != PagerPosition.Top);
1102                                                 top_pager = false;
1103                                         }
1104
1105                                         if (item.Visible)
1106                                                 item.MergeStyle (pager_style);
1107                                         break;
1108                                 }
1109                         }
1110                 }
1111
1112                 protected override bool OnBubbleEvent (object source, EventArgs e)
1113                 {
1114                         DataGridCommandEventArgs de = e as DataGridCommandEventArgs;
1115
1116                         if (de == null)
1117                                 return false;
1118
1119                         string cn = de.CommandName;
1120                         CultureInfo inv = CultureInfo.InvariantCulture;
1121
1122                         OnItemCommand (de);
1123                         if (String.Compare (cn, CancelCommandName, true, inv) == 0) {
1124                                 OnCancelCommand (de);
1125                         } else if (String.Compare (cn, DeleteCommandName, true, inv) == 0) {
1126                                 OnDeleteCommand (de);
1127                         } else if (String.Compare (cn, EditCommandName, true, inv) == 0) {
1128                                 OnEditCommand (de);
1129                         } else if (String.Compare (cn, SelectCommandName, true, inv) == 0) {
1130                                 SelectedIndex = de.Item.ItemIndex;
1131                                 OnSelectedIndexChanged (de);
1132                         } else if (String.Compare (cn, SortCommandName, true, inv) == 0) {
1133                                 DataGridSortCommandEventArgs se = new DataGridSortCommandEventArgs (de.CommandSource, de);
1134                                 OnSortCommand (se);
1135                         } else if (String.Compare (cn, UpdateCommandName, true, inv) == 0) {
1136                                 OnUpdateCommand (de);
1137                         } else if (String.Compare (cn, PageCommandName, true, inv) == 0) {
1138                                 int new_index;
1139                                 if (String.Compare ((string) de.CommandArgument,
1140                                                     NextPageCommandArgument, true, inv) == 0) {
1141                                         new_index = CurrentPageIndex + 1;
1142                                 } else if (String.Compare ((string) de.CommandArgument,
1143                                                            PrevPageCommandArgument, true, inv) == 0) {
1144                                         new_index = CurrentPageIndex - 1;
1145                                 } else {
1146                                         // It seems to just assume it's an int and parses, no
1147                                         // checks to make sure its valid or anything.
1148                                         //  also it's always one less then specified, not sure
1149                                         // why that is.
1150                                         new_index = Int32.Parse ((string) de.CommandArgument, inv) - 1;
1151                                 }
1152                                 DataGridPageChangedEventArgs pc = new DataGridPageChangedEventArgs (
1153                                         de.CommandSource, new_index);
1154                                 OnPageIndexChanged (pc);
1155                         }
1156
1157                         return true;
1158                 }
1159
1160                 protected virtual void OnCancelCommand (DataGridCommandEventArgs e)
1161                 {
1162                         DataGridCommandEventHandler handler = (DataGridCommandEventHandler) Events [CancelCommandEvent];
1163                         if (handler != null)
1164                                 handler (this, e);
1165                 }
1166
1167                 protected virtual void OnDeleteCommand (DataGridCommandEventArgs e)
1168                 {
1169                         DataGridCommandEventHandler handler = (DataGridCommandEventHandler) Events [DeleteCommandEvent];
1170                         if (handler != null)
1171                                 handler (this, e);
1172                 }
1173
1174                 protected virtual void OnEditCommand (DataGridCommandEventArgs e)
1175                 {
1176                         DataGridCommandEventHandler handler = (DataGridCommandEventHandler) Events [EditCommandEvent];
1177                         if (handler != null)
1178                                 handler (this, e);
1179                 }
1180
1181                 protected virtual void OnItemCommand (DataGridCommandEventArgs e)
1182                 {
1183                         DataGridCommandEventHandler handler = (DataGridCommandEventHandler) Events [ItemCommandEvent];
1184                         if (handler != null)
1185                                 handler (this, e);
1186                 }
1187
1188                 protected virtual void OnItemCreated (DataGridItemEventArgs e)
1189                 {
1190                         DataGridItemEventHandler handler = (DataGridItemEventHandler) Events [ItemCreatedEvent];
1191                         if (handler != null)
1192                                 handler (this, e);
1193                 }
1194
1195                 protected virtual void OnItemDataBound (DataGridItemEventArgs e)
1196                 {
1197                         DataGridItemEventHandler handler = (DataGridItemEventHandler) Events [ItemDataBoundEvent];
1198                         if (handler != null)
1199                                 handler (this, e);
1200                 }
1201
1202                 protected virtual void OnPageIndexChanged (DataGridPageChangedEventArgs e)
1203                 {
1204                         DataGridPageChangedEventHandler handler = (DataGridPageChangedEventHandler) Events [PageIndexChangedEvent];
1205                         if (handler != null)
1206                                 handler (this, e);
1207                 }
1208
1209                 protected virtual void OnSortCommand (DataGridSortCommandEventArgs e)
1210                 {
1211                         DataGridSortCommandEventHandler handler = (DataGridSortCommandEventHandler) Events [SortCommandEvent];
1212                         if (handler != null)
1213                                 handler (this, e);
1214                 }
1215
1216                 protected virtual void OnUpdateCommand (DataGridCommandEventArgs e)
1217                 {
1218                         DataGridCommandEventHandler handler = (DataGridCommandEventHandler) Events [UpdateCommandEvent];
1219                         if (handler != null)
1220                                 handler (this, e);
1221                 }
1222
1223                 [WebSysDescription ("")]
1224                 [WebCategory ("Action")]
1225                 public event DataGridCommandEventHandler CancelCommand {
1226                         add { Events.AddHandler (CancelCommandEvent, value); }
1227                         remove { Events.RemoveHandler (CancelCommandEvent, value); }
1228                 }
1229
1230                 [WebSysDescription ("")]
1231                 [WebCategory ("Action")]
1232                 public event DataGridCommandEventHandler DeleteCommand {
1233                         add { Events.AddHandler (DeleteCommandEvent, value); }
1234                         remove { Events.RemoveHandler (DeleteCommandEvent, value); }
1235                 }
1236
1237                 [WebSysDescription ("")]
1238                 [WebCategory ("Action")]
1239                 public event DataGridCommandEventHandler EditCommand {
1240                         add { Events.AddHandler (EditCommandEvent, value); }
1241                         remove { Events.RemoveHandler (EditCommandEvent, value); }
1242                 }
1243
1244                 [WebSysDescription ("")]
1245                 [WebCategory ("Action")]
1246                 public event DataGridCommandEventHandler ItemCommand {
1247                         add { Events.AddHandler (ItemCommandEvent, value); }
1248                         remove { Events.RemoveHandler (ItemCommandEvent, value); }
1249
1250                 }
1251
1252                 [WebSysDescription ("")]
1253                 [WebCategory ("Action")]
1254                 public event DataGridItemEventHandler ItemCreated {
1255                         add { Events.AddHandler (ItemCreatedEvent, value); }
1256                         remove { Events.RemoveHandler (ItemCreatedEvent, value); }
1257                 }
1258
1259                 [WebSysDescription ("")]
1260                 [WebCategory ("Action")]
1261                 public event DataGridItemEventHandler ItemDataBound {
1262                         add { Events.AddHandler (ItemDataBoundEvent, value); }
1263                         remove { Events.RemoveHandler (ItemDataBoundEvent, value); }
1264                 }
1265
1266                 [WebSysDescription ("")]
1267                 [WebCategory ("Action")]
1268                 public event DataGridPageChangedEventHandler PageIndexChanged {
1269                         add { Events.AddHandler (PageIndexChangedEvent, value); }
1270                         remove { Events.RemoveHandler (PageIndexChangedEvent, value); }
1271                 }
1272
1273                 [WebSysDescription ("")]
1274                 [WebCategory ("Action")]
1275                 public event DataGridSortCommandEventHandler SortCommand {
1276                         add { Events.AddHandler (SortCommandEvent, value); }
1277                         remove { Events.RemoveHandler (SortCommandEvent, value); }
1278                 }
1279
1280                 [WebSysDescription ("")]
1281                 [WebCategory ("Action")]
1282                 public event DataGridCommandEventHandler UpdateCommand {
1283                         add { Events.AddHandler (UpdateCommandEvent, value); }
1284                         remove { Events.AddHandler (UpdateCommandEvent, value); }
1285                 }
1286         }
1287 }
1288