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