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

   1 //
   2 // System.Web.UI.WebControls.RadioButton.cs
   3 //
   4 // Author:
   5 //      Dick Porter  <dick@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.Specialized;
  30 using System.ComponentModel;
  31 using System.Security.Permissions;
  32
  33 namespace System.Web.UI.WebControls {
  34
  35         // CAS
  36         [AspNetHostingPermissionAttribute (SecurityAction.LinkDemand, Level = AspNetHostingPermissionLevel.Minimal)]
  37         [AspNetHostingPermissionAttribute (SecurityAction.InheritanceDemand, Level = AspNetHostingPermissionLevel.Minimal)]
  38         // attributes
  39         [Designer ("System.Web.UI.Design.WebControls.CheckBoxDesigner, " + Consts.AssemblySystem_Design, "System.ComponentModel.Design.IDesigner")]
  40 #if NET_2_0
  41         [SupportsEventValidation]
  42 #endif
  43         public class RadioButton : CheckBox , IPostBackDataHandler
  44         {
  45                 public RadioButton () : base ("radio")
  46                 {
  47                 }
  48
  49                 [DefaultValue ("")]
  50 #if NET_2_0
  51                 [Themeable (false)]
  52 #endif
  53                 [WebSysDescription ("")]
  54                 [WebCategory ("Behavior")]
  55                 public virtual string GroupName
  56                 {
  57                         get {
  58                                 return (ViewState.GetString ("GroupName",
  59                                                              String.Empty));
  60                         }
  61                         set {
  62                                 ViewState["GroupName"] = value;
  63                         }
  64                 }
  65
  66                 internal override string NameAttribute
  67                 {
  68                         get {
  69                                 return (GroupName);
  70                         }
  71                 }
  72
  73                 internal override void InternalAddAttributesToRender (HtmlTextWriter w)
  74                 {
  75                         base.InternalAddAttributesToRender (w);
  76                         w.AddAttribute (HtmlTextWriterAttribute.Value, this.UniqueID);
  77                 }
  78
  79 #if NET_2_0
  80                 protected internal
  81 #else
  82                 protected
  83 #endif
  84                 override void OnPreRender (EventArgs e)
  85                 {
  86                         base.OnPreRender (e);
  87                 }
  88
  89 #if NET_2_0
  90                 protected override
  91 #endif
  92                 bool LoadPostData (string postDataKey, NameValueCollection postCollection)
  93                 {
  94                         bool old_checked = Checked;
  95
  96                         if (postCollection[GroupName] == postDataKey) {
  97                                 Checked = true;
  98                         } else {
  99                                 Checked = false;
 100                         }
 101
 102                         if (old_checked != Checked) {
 103                                 return (true);
 104                         } else {
 105                                 return (false);
 106                         }
 107                 }
 108
 109 #if NET_2_0
 110                 protected override
 111 #endif
 112                 void RaisePostDataChangedEvent ()
 113                 {
 114                 }
 115
 116                 bool IPostBackDataHandler.LoadPostData (string postDataKey, NameValueCollection postCollection)
 117                 {
 118                         return LoadPostData (postDataKey, postCollection);
 119                 }
 120         }
 121 }