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                                 string unique = UniqueID;
  70                                 string gn = GroupName;
  71                                 if (gn.Length == 0)
  72                                         return unique;
  73                                 int colon = -1;
  74                                 if (unique != null) {
  75 #if NET_2_0
  76                                         colon = unique.LastIndexOf (IdSeparator);
  77 #else
  78                                         colon = unique.IndexOf (IdSeparator);
  79 #endif
  80                                 }
  81
  82                                 if (colon == -1)
  83                                         return gn;
  84
  85                                 return unique.Substring (0, colon + 1) + gn;
  86                         }
  87                 }
  88
  89                 internal string ValueAttribute {
  90                         get {
  91                                 string val = (string)ViewState ["Value"];
  92                                 if (val != null)
  93                                         return val;
  94
  95 #if NET_2_0
  96                                 string id = ID;
  97                                 if (!String.IsNullOrEmpty (id))
  98                                         return id;
  99                                 else
 100 #endif
 101                                         return UniqueID;
 102                         }
 103                         set {
 104                                 ViewState["Value"] = value;
 105                         }
 106                 }
 107
 108                 internal override void InternalAddAttributesToRender (HtmlTextWriter w)
 109                 {
 110 #if NET_2_0
 111                         Page page = Page;
 112                         if (page != null)
 113                                 page.ClientScript.RegisterForEventValidation (NameAttribute, ValueAttribute);
 114 #endif
 115                         base.InternalAddAttributesToRender (w);
 116                         w.AddAttribute (HtmlTextWriterAttribute.Value, ValueAttribute);
 117                 }
 118
 119 #if NET_2_0
 120                 protected internal
 121 #else
 122                 protected
 123 #endif
 124                 override void OnPreRender (EventArgs e)
 125                 {
 126                         base.OnPreRender (e);
 127                 }
 128
 129 #if NET_2_0
 130                 protected override
 131 #endif
 132                 bool LoadPostData (string postDataKey, NameValueCollection postCollection)
 133                 {
 134                         string value = postCollection [NameAttribute];
 135                         bool checkedOnClient = value == ValueAttribute;
 136 #if NET_2_0
 137                         ValidateEvent (NameAttribute, value);
 138 #endif
 139                         if (Checked == checkedOnClient)
 140                                 return false;
 141
 142                         Checked = checkedOnClient;
 143                         return checkedOnClient;
 144                 }
 145
 146 #if NET_2_0
 147                 protected override void RaisePostDataChangedEvent ()
 148                 {
 149                         if (CausesValidation)
 150                                 Page.Validate (ValidationGroup);
 151                         OnCheckedChanged (EventArgs.Empty);
 152                 }
 153 #endif
 154
 155                 bool IPostBackDataHandler.LoadPostData (string postDataKey, NameValueCollection postCollection)
 156                 {
 157                         return LoadPostData (postDataKey, postCollection);
 158                 }
 159         }
 160 }