mcs/class/System.Web/System.Web.UI.HtmlControls/HtmlInputRadioButton.cs

   1 //
   2 // System.Web.UI.HtmlControls.HtmlInputRadioButton.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.ComponentModel;
  30 using System.Collections.Specialized;
  31 using System.Security.Permissions;
  32
  33 namespace System.Web.UI.HtmlControls {
  34
  35         // CAS
  36         [AspNetHostingPermission (SecurityAction.LinkDemand, Level = AspNetHostingPermissionLevel.Minimal)]
  37         [AspNetHostingPermission (SecurityAction.InheritanceDemand, Level = AspNetHostingPermissionLevel.Minimal)]
  38         // attributes
  39         [DefaultEvent ("ServerChange")]
  40 #if NET_2_0
  41         [SupportsEventValidation]
  42 #endif
  43         public class HtmlInputRadioButton : HtmlInputControl, IPostBackDataHandler
  44         {
  45                 static readonly object serverChangeEvent = new object ();
  46
  47                 public HtmlInputRadioButton ()
  48                         : base ("radio")
  49                 {
  50                 }
  51
  52                 [DefaultValue ("")]
  53                 [DesignerSerializationVisibility (DesignerSerializationVisibility.Hidden)]
  54                 [WebSysDescription("")]
  55                 [WebCategory("Misc")]
  56                 public bool Checked {
  57                         get { return (Attributes ["checked"] == "checked"); }
  58                         set {
  59                                 if (value)
  60                                         Attributes ["checked"] = "checked";
  61                                 else
  62                                         Attributes.Remove ("checked");
  63                         }
  64                 }
  65
  66                 public override string Name {
  67                         get {
  68                                 string s = Attributes ["name"];
  69                                 return (s == null) ? String.Empty : s;
  70                         }
  71                         set {
  72                                 if (value == null)
  73                                         Attributes.Remove ("name");
  74                                 else
  75                                         Attributes ["name"] = value;
  76                         }
  77                 }
  78
  79                 public override string Value {
  80                         get {
  81                                 string s = Attributes ["value"];
  82                                 if (s == null || s.Length == 0) {
  83                                         s = ID;
  84                                         if ((s != null) && (s.Length == 0))
  85                                                 s = null;
  86                                 }
  87                                 return s;
  88                         }
  89                         set {
  90                                 if (value == null)
  91                                         Attributes.Remove ("value");
  92                                 else
  93                                         Attributes ["value"] = value;
  94                         }
  95                 }
  96
  97 #if NET_2_0
  98                 protected internal
  99 #else
 100                 protected
 101 #endif
 102                 override void OnPreRender (EventArgs e)
 103                 {
 104                         base.OnPreRender (e);
 105
 106                         if (Page != null && !Disabled) {
 107                                 Page.RegisterRequiresPostBack (this);
 108 #if NET_2_0
 109                                 Page.RegisterEnabledControl (this);
 110 #endif
 111                         }
 112                 }
 113
 114                 protected virtual void OnServerChange (EventArgs e)
 115                 {
 116                         EventHandler serverChange = (EventHandler) Events [serverChangeEvent];
 117                         if (serverChange != null)
 118                                 serverChange (this, e);
 119                 }
 120
 121                 protected override void RenderAttributes (HtmlTextWriter writer)
 122                 {
 123 #if NET_2_0
 124                         if (Page != null)
 125                                 Page.ClientScript.RegisterForEventValidation (this.UniqueID, Value);
 126 #endif
 127                         writer.WriteAttribute ("value", Value, true);
 128                         Attributes.Remove ("value");
 129                         base.RenderAttributes (writer);
 130                 }
 131 #if NET_2_0
 132                 protected virtual
 133 #endif
 134                 bool LoadPostData (string postDataKey, NameValueCollection postCollection)
 135                 {
 136                         bool checkedOnClient = postCollection [Name] == Value;
 137                         if (Checked == checkedOnClient)
 138                                 return false;
 139
 140 #if NET_2_0
 141                         ValidateEvent (UniqueID, Value);
 142 #endif
 143                         Checked = checkedOnClient;
 144                         return checkedOnClient;
 145                 }
 146
 147 #if NET_2_0
 148                 protected virtual
 149 #endif
 150                 void RaisePostDataChangedEvent ()
 151                 {
 152                         OnServerChange (EventArgs.Empty);
 153                 }
 154
 155                 bool IPostBackDataHandler.LoadPostData (string postDataKey, NameValueCollection postCollection)
 156                 {
 157                         return LoadPostData (postDataKey, postCollection);
 158                 }
 159
 160                 void IPostBackDataHandler.RaisePostDataChangedEvent ()
 161                 {
 162                         RaisePostDataChangedEvent ();
 163                 }
 164
 165
 166                 [WebSysDescription("")]
 167                 [WebCategory("Action")]
 168                 public event EventHandler ServerChange {
 169                         add { Events.AddHandler (serverChangeEvent, value); }
 170                         remove { Events.RemoveHandler (serverChangeEvent, value); }
 171                 }
 172         }
 173 }