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                 private 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 (CausesValidation)
  93 #if NET_2_0
  94                                 Page.Validate (ValidationGroup);
  95 #else
  96                                 Page.Validate ();
  97 #endif
  98                         OnServerClick (EventArgs.Empty);
  99                 }
 100
 101 #if NET_2_0
 102                 protected internal
 103 #else
 104                 protected
 105 #endif
 106                 override void OnPreRender (EventArgs e)
 107                 {
 108                         base.OnPreRender (e);
 109                 }
 110
 111                 protected virtual void OnServerClick (EventArgs e)
 112                 {
 113                         EventHandler server_click = (EventHandler) Events [ServerClickEvent];
 114                         if (server_click != null)
 115                                 server_click (this, e);
 116                 }
 117
 118                 protected override void RenderAttributes (HtmlTextWriter writer)
 119                 {
 120 #if NET_2_0
 121                         if (Page != null && Events [ServerClickEvent] != null) {
 122                                 PostBackOptions options = GetPostBackOptions ();
 123                                 Page.ClientScript.RegisterForEventValidation (options);
 124                                 Attributes ["onclick"] += Page.ClientScript.GetPostBackEventReference (options);
 125                                 writer.WriteAttribute ("language", "javascript");
 126                         }
 127 #else
 128                         ClientScriptManager csm = new ClientScriptManager (Page);
 129                         bool postback = false;
 130
 131                         if (Page != null && Events [ServerClickEvent] != null)
 132                                 postback = true;
 133
 134                         if (CausesValidation && Page != null && Page.AreValidatorsUplevel ()) {
 135                                 if (postback)
 136                                         writer.WriteAttribute ("onclick",
 137                                                                String.Concat ("javascript:{if (typeof(Page_ClientValidate) != 'function' ||  Page_ClientValidate()) ",
 138                                                                               csm.GetPostBackEventReference (this, String.Empty), "}"));
 139                                 else
 140                                         writer.WriteAttribute ("onclick",
 141                                                                "if (typeof(Page_ClientValidate) == 'function') Page_ClientValidate();");
 142
 143                                 writer.WriteAttribute ("language", "javascript");
 144                         }
 145                         else if (postback) {
 146                                 writer.WriteAttribute ("onclick",
 147                                                        Page.ClientScript.GetPostBackClientHyperlink (this, ""));
 148
 149                                 writer.WriteAttribute ("language", "javascript");
 150                         }
 151 #endif
 152
 153                         base.RenderAttributes (writer);
 154                 }
 155
 156 #if NET_2_0
 157                 PostBackOptions GetPostBackOptions () {
 158                         PostBackOptions options = new PostBackOptions (this);
 159                         options.ValidationGroup = null;
 160                         options.ActionUrl = null;
 161                         options.Argument = "";
 162                         options.RequiresJavaScriptProtocol = false;
 163                         options.ClientSubmit = true;
 164                         options.PerformValidation = CausesValidation && Page != null && Page.AreValidatorsUplevel (ValidationGroup);
 165                         if (options.PerformValidation)
 166                                 options.ValidationGroup = ValidationGroup;
 167
 168                         return options;
 169                 }
 170 #endif
 171
 172                 [WebSysDescription("")]
 173                 [WebCategory("Action")]
 174                 public event EventHandler ServerClick {
 175                         add { Events.AddHandler (ServerClickEvent, value); }
 176                         remove { Events.RemoveHandler (ServerClickEvent, value); }
 177                 }
 178         }
 179
 180 }
 181