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

   1 //
   2 // Permission is hereby granted, free of charge, to any person obtaining
   3 // a copy of this software and associated documentation files (the
   4 // "Software"), to deal in the Software without restriction, including
   5 // without limitation the rights to use, copy, modify, merge, publish,
   6 // distribute, sublicense, and/or sell copies of the Software, and to
   7 // permit persons to whom the Software is furnished to do so, subject to
   8 // the following conditions:
   9 //
  10 // The above copyright notice and this permission notice shall be
  11 // included in all copies or substantial portions of the Software.
  12 //
  13 // THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
  14 // EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
  15 // MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
  16 // NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
  17 // LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
  18 // OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
  19 // WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
  20 //
  21 //
  22 // System.Web.UI.HtmlControls.HtmlButton
  23 //
  24 // Authors:
  25 //      Jackson Harper (jackson@ximian.com)
  26 //
  27 // (C) 2005 Novell, Inc.
  28
  29
  30 using System.ComponentModel;
  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("ServerClick")]
  40 #if NET_2_0
  41         [SupportsEventValidation]
  42 #endif
  43         public class HtmlButton : HtmlContainerControl, IPostBackEventHandler {
  44
  45                 static readonly object ServerClickEvent = new object();
  46
  47                 public HtmlButton () : base ("button")
  48                 {
  49                 }
  50
  51                 [DefaultValue(true)]
  52                 [WebSysDescription("")]
  53                 [WebCategory("Behavior")]
  54 #if NET_2_0
  55                 public virtual
  56 #else
  57                 public
  58 #endif
  59                 bool CausesValidation {
  60                         get {
  61                                 return ViewState.GetBool ("CausesValidation", true);
  62                         }
  63                         set {
  64                                 ViewState ["CausesValidation"] = value;
  65                         }
  66                 }
  67
  68 #if NET_2_0
  69                 [DefaultValue ("")]
  70                 public virtual string ValidationGroup
  71                 {
  72                         get {
  73                                 return ViewState.GetString ("ValidationGroup", "");
  74                         }
  75                         set {
  76                                 ViewState ["ValidationGroup"] = value;
  77                         }
  78                 }
  79 #endif
  80
  81 #if NET_2_0
  82                 void IPostBackEventHandler.RaisePostBackEvent (string eventArgument)
  83                 {
  84                         RaisePostBackEvent (eventArgument);
  85                 }
  86
  87                 protected virtual void RaisePostBackEvent (string eventArgument)
  88 #else
  89                 void IPostBackEventHandler.RaisePostBackEvent (string eventArgument)
  90 #endif
  91                 {
  92 #if NET_2_0
  93                         ValidateEvent (UniqueID, eventArgument);
  94 #endif
  95                         if (CausesValidation)
  96 #if NET_2_0
  97                                 Page.Validate (ValidationGroup);
  98 #else
  99                                 Page.Validate ();
 100 #endif
 101                         OnServerClick (EventArgs.Empty);
 102                 }
 103
 104 #if NET_2_0
 105                 protected internal
 106 #else
 107                 protected
 108 #endif
 109                 override void OnPreRender (EventArgs e)
 110                 {
 111                         base.OnPreRender (e);
 112                 }
 113
 114                 protected virtual void OnServerClick (EventArgs e)
 115                 {
 116                         EventHandler server_click = (EventHandler) Events [ServerClickEvent];
 117                         if (server_click != null)
 118                                 server_click (this, e);
 119                 }
 120
 121                 protected override void RenderAttributes (HtmlTextWriter writer)
 122                 {
 123 #if NET_2_0
 124                         if (Page != null && Events [ServerClickEvent] != null) {
 125                                 PostBackOptions options = GetPostBackOptions ();
 126                                 Attributes ["onclick"] += Page.ClientScript.GetPostBackEventReference (options, true);
 127                                 writer.WriteAttribute ("language", "javascript");
 128                         }
 129 #else
 130                         ClientScriptManager csm = new ClientScriptManager (Page);
 131                         bool postback = false;
 132
 133                         if (Page != null && Events [ServerClickEvent] != null)
 134                                 postback = true;
 135
 136                         if (CausesValidation && Page != null && Page.AreValidatorsUplevel ()) {
 137                                 if (postback)
 138                                         writer.WriteAttribute ("onclick",
 139                                                                String.Concat ("javascript:{if (typeof(Page_ClientValidate) != 'function' ||  Page_ClientValidate()) ",
 140                                                                               csm.GetPostBackEventReference (this, String.Empty), "}"));
 141                                 else
 142                                         writer.WriteAttribute ("onclick",
 143                                                                "if (typeof(Page_ClientValidate) == 'function') Page_ClientValidate();");
 144
 145                                 writer.WriteAttribute ("language", "javascript");
 146                         }
 147                         else if (postback) {
 148                                 writer.WriteAttribute ("onclick",
 149                                                        Page.ClientScript.GetPostBackClientHyperlink (this, ""));
 150
 151                                 writer.WriteAttribute ("language", "javascript");
 152                         }
 153 #endif
 154
 155                         base.RenderAttributes (writer);
 156                 }
 157
 158 #if NET_2_0
 159                 PostBackOptions GetPostBackOptions () {
 160                         PostBackOptions options = new PostBackOptions (this);
 161                         options.ValidationGroup = null;
 162                         options.ActionUrl = null;
 163                         options.Argument = String.Empty;
 164                         options.RequiresJavaScriptProtocol = false;
 165                         options.ClientSubmit = true;
 166                         options.PerformValidation = CausesValidation && Page != null && Page.AreValidatorsUplevel (ValidationGroup);
 167                         if (options.PerformValidation)
 168                                 options.ValidationGroup = ValidationGroup;
 169
 170                         return options;
 171                 }
 172 #endif
 173
 174                 [WebSysDescription("")]
 175                 [WebCategory("Action")]
 176                 public event EventHandler ServerClick {
 177                         add { Events.AddHandler (ServerClickEvent, value); }
 178                         remove { Events.RemoveHandler (ServerClickEvent, value); }
 179                 }
 180         }
 181
 182 }
 183