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

   1 //
   2 // System.Web.UI.WebControls.DataListItem.cs
   3 //
   4 // Author:
   5 //      Sebastien Pouliot  <sebastien@ximian.com>
   6 //
   7 // Copyright (C) 2005-2010 Novell, Inc (http://www.novell.com)
   8 //
   9 // Permission is hereby granted, free of charge, to any person obtaining
  10 // a copy of this software and associated documentation files (the
  11 // "Software"), to deal in the Software without restriction, including
  12 // without limitation the rights to use, copy, modify, merge, publish,
  13 // distribute, sublicense, and/or sell copies of the Software, and to
  14 // permit persons to whom the Software is furnished to do so, subject to
  15 // the following conditions:
  16 //
  17 // The above copyright notice and this permission notice shall be
  18 // included in all copies or substantial portions of the Software.
  19 //
  20 // THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
  21 // EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
  22 // MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
  23 // NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
  24 // LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
  25 // OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
  26 // WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
  27 //
  28
  29 using System.Collections;
  30 using System.ComponentModel;
  31 using System.Security.Permissions;
  32
  33 namespace System.Web.UI.WebControls
  34 {
  35         // CAS
  36         [AspNetHostingPermission (SecurityAction.LinkDemand, Level = AspNetHostingPermissionLevel.Minimal)]
  37         [AspNetHostingPermission (SecurityAction.InheritanceDemand, Level = AspNetHostingPermissionLevel.Minimal)]
  38         // attributes
  39         [ToolboxItem ("")]
  40         public class DataListItem : WebControl, INamingContainer, IDataItemContainer
  41         {
  42                 int index;
  43                 ListItemType type;
  44                 object item;
  45
  46                 public DataListItem (int itemIndex, ListItemType itemType)
  47                 {
  48                         index = itemIndex;
  49                         type = itemType;
  50                 }
  51
  52                 public virtual object DataItem {
  53                         get { return item; }
  54                         set { item = value; }
  55                 }
  56
  57                 public virtual int ItemIndex {
  58                         get { return index; }
  59                 }
  60
  61                 public virtual ListItemType ItemType {
  62                         get { return type; }
  63                 }
  64 #if NET_4_0
  65                 public override bool SupportsDisabledAttribute {
  66                         get { return RenderingCompatibilityLessThan40; }
  67                 }
  68 #endif
  69                 protected override Style CreateControlStyle ()
  70                 {
  71                         return new TableItemStyle (ViewState);
  72                 }
  73
  74                 // see ... "Building DataBound Templated Custom ASP.NET" on msdn
  75                 // http://msdn.microsoft.com/library/en-us/dnaspp/html/databoundtemplatedcontrols.asp
  76                 //
  77                 // This technique is used in the DataGrid, DataList, and Repeater to handle the
  78                 // Command event of Buttons, LinkButtons, and ImageButtons within the
  79                 // controls. Since the button's Command event calls RaiseBubbleEvent(), this
  80                 // percolates the event up to the button's parent.
  81                 protected override bool OnBubbleEvent (object source, EventArgs e)
  82                 {
  83                         CommandEventArgs ce = e as CommandEventArgs;
  84                         if (ce != null) {
  85                                 base.RaiseBubbleEvent (this, new DataListCommandEventArgs (this, source, ce));
  86                                 return true;
  87                         }
  88                         return false;
  89                 }
  90
  91                 public virtual void RenderItem (HtmlTextWriter writer, bool extractRows, bool tableLayout)
  92                 {
  93                         bool span = (!extractRows && !tableLayout);
  94                         if (span)
  95                                 writer.RenderBeginTag (TagKey);
  96
  97                         if (HasControls ()) {
  98                                 if (extractRows) {
  99                                         bool table = false;
 100                                         foreach (Control c in Controls) {
 101                                                 Table t = (c as Table);
 102                                                 if (t != null) {
 103                                                         table = true;
 104                                                         foreach (TableRow tr in t.Rows) {
 105                                                                 if (ControlStyleCreated && !ControlStyle.IsEmpty)
 106                                                                         tr.ControlStyle.MergeWith (ControlStyle);
 107                                                                 tr.RenderControl (writer);
 108                                                         }
 109                                                         break; // ignore all, but the first, table
 110                                                 }
 111                                         }
 112                                         if (!table) {
 113                                                 // if it has controls then it must have a Table control
 114                                                 throw new HttpException ("No Table found in DataList template.");
 115                                                 // other controls are ignored (as long as a Table is there)
 116                                         }
 117                                 } else {
 118                                         // this get rides of the extra <span>...</span> around our stuff
 119                                         RenderContents (writer);
 120                                 }
 121                         }
 122
 123                         if (span)
 124                                 writer.RenderEndTag ();
 125                 }
 126
 127                 protected virtual void SetItemType (ListItemType itemType)
 128                 {
 129                         type = itemType;
 130                 }
 131
 132                 object IDataItemContainer.DataItem {
 133                         get { return item; }
 134                 }
 135
 136                 int IDataItemContainer.DataItemIndex {
 137                         get { return index; }
 138                 }
 139
 140                 int IDataItemContainer.DisplayIndex {
 141                         get { return index; }
 142                 }
 143         }
 144 }