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 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 #if NET_2_0
  41         public class DataListItem : WebControl, INamingContainer, IDataItemContainer {
  42 #else
  43         public class DataListItem : WebControl, INamingContainer {
  44 #endif
  45                 private int index;
  46                 private ListItemType type;
  47                 private object item;
  48
  49
  50                 public DataListItem (int itemIndex, ListItemType itemType)
  51                 {
  52                         index = itemIndex;
  53                         type = itemType;
  54                 }
  55
  56
  57                 public virtual object DataItem {
  58                         get { return item; }
  59                         set { item = value; }
  60                 }
  61
  62                 public virtual int ItemIndex {
  63                         get { return index; }
  64                 }
  65
  66                 public virtual ListItemType ItemType {
  67                         get { return type; }
  68                 }
  69
  70
  71                 protected override Style CreateControlStyle ()
  72                 {
  73                         return new TableItemStyle (ViewState);
  74                 }
  75
  76                 // see ... "Building DataBound Templated Custom ASP.NET" on msdn
  77                 // http://msdn.microsoft.com/library/en-us/dnaspp/html/databoundtemplatedcontrols.asp
  78                 //
  79                 // This technique is used in the DataGrid, DataList, and Repeater to handle the
  80                 // Command event of Buttons, LinkButtons, and ImageButtons within the
  81                 // controls. Since the button's Command event calls RaiseBubbleEvent(), this
  82                 // percolates the event up to the button's parent.
  83                 protected override bool OnBubbleEvent (object source, EventArgs e)
  84                 {
  85                         CommandEventArgs ce = e as CommandEventArgs;
  86                         if (ce != null) {
  87                                 base.RaiseBubbleEvent (this, new DataListCommandEventArgs (this, source, ce));
  88                                 return true;
  89                         }
  90                         return false;
  91                 }
  92
  93                 public virtual void RenderItem (HtmlTextWriter writer, bool extractRows, bool tableLayout)
  94                 {
  95                         bool span = (!extractRows && !tableLayout);
  96                         if (span) {
  97                                 writer.RenderBeginTag (TagKey);
  98                         }
  99
 100                         if (HasControls ()) {
 101                                 if (extractRows) {
 102                                         bool table = false;
 103                                         foreach (Control c in Controls) {
 104                                                 Table t = (c as Table);
 105                                                 if (t != null) {
 106                                                         table = true;
 107                                                         foreach (TableRow tr in t.Rows) {
 108                                                                 if (ControlStyleCreated) {
 109                                                                         ControlStyle.AddAttributesToRender (writer);
 110                                                                 }
 111                                                                 tr.RenderControl (writer);
 112                                                         }
 113                                                         break; // ignore all, but the first, table
 114                                                 }
 115                                         }
 116                                         if (!table) {
 117                                                 // if it has controls then it must have a Table control
 118                                                 throw new HttpException ("No Table found in DataList template.");
 119                                                 // other controls are ignored (as long as a Table is there)
 120                                         }
 121                                 } else {
 122                                         // this get rides of the extra <span>...</span> around our stuff
 123                                         RenderContents (writer);
 124                                 }
 125                         }
 126
 127                         if (span) {
 128                                 writer.RenderEndTag ();
 129                         }
 130                 }
 131
 132                 protected virtual void SetItemType (ListItemType itemType)
 133                 {
 134                         type = itemType;
 135                 }
 136
 137 #if NET_2_0
 138                 object IDataItemContainer.DataItem {
 139                         get { return item; }
 140                 }
 141
 142                 int IDataItemContainer.DataItemIndex {
 143                         get { return index; }
 144                 }
 145
 146                 int IDataItemContainer.DisplayIndex {
 147                         get { return index; }
 148                 }
 149 #endif
 150         }
 151 }