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

   1 /*      System.Web.UI.HtmlControls\r
   2 *       Authors\r
   3 *               Leen Toelen (toelen@hotmail.com)\r
   4 */\r
   5 \r
   6 using System;\r
   7 using System.ComponentModel;\r
   8 using System.Web;\r
   9 using System.Web.UI;\r
  10 \r
  11 namespace System.Web.UI.HtmlControls{\r
  12         \r
  13         [DefaultEvent("ServerClick")]\r
  14         public class HtmlAnchor : HtmlContainerControl, IPostBackEventHandler{\r
  15                 \r
  16                 private static readonly object EventServerClick = new object ();\r
  17                 \r
  18                 public HtmlAnchor(): base("a"){}\r
  19                 \r
  20                 protected override void OnPreRender (EventArgs e)\r
  21                 {\r
  22                         base.OnPreRender (e);\r
  23                         if (Page != null && Events [EventServerClick] != null)\r
  24                                 Page.RequiresPostBackScript ();\r
  25                 }\r
  26 \r
  27                 protected virtual void OnServerClick(EventArgs e){\r
  28                         EventHandler handler;\r
  29                         handler = (EventHandler) Events[EventServerClick];\r
  30                         if (handler != null)\r
  31                                 handler (this, e);\r
  32                 }\r
  33                 \r
  34                 protected override void RenderAttributes(HtmlTextWriter writer){\r
  35                         if ( Events[EventServerClick] != null){\r
  36                                 Attributes.Remove("href");\r
  37                                 base.RenderAttributes(writer);\r
  38                                 writer.WriteAttribute("href", Page.GetPostBackClientHyperlink(this,String.Empty));\r
  39                         }\r
  40                         else{\r
  41                                 PreProcessRelativeReference(writer,"href");\r
  42                                 base.RenderAttributes(writer);\r
  43                         }\r
  44                 }\r
  45                 \r
  46                 void System.Web.UI.IPostBackEventHandler.RaisePostBackEvent(string eventArgument){\r
  47                         OnServerClick(EventArgs.Empty);\r
  48                 }\r
  49 \r
  50                 [WebCategory("Action")]\r
  51                 [WebSysDescription("Fires when the control is clicked.")]\r
  52                 public event EventHandler ServerClick{\r
  53                         add{\r
  54                                 Events.AddHandler(EventServerClick, value);\r
  55                         }\r
  56                         remove{\r
  57                                 Events.RemoveHandler(EventServerClick, value);\r
  58                         }\r
  59                 }\r
  60                 \r
  61                 [DefaultValue("")]\r
  62                 [WebCategory("Action")]\r
  63                 [DesignerSerializationVisibility (DesignerSerializationVisibility.Hidden)]\r
  64                 public string HRef{\r
  65                         get{\r
  66                                 string attr = Attributes["href"];\r
  67                                 if (attr != null) return attr;\r
  68                                 return String.Empty;\r
  69                         }\r
  70                         set{\r
  71                                 Attributes["href"] = AttributeToString(value);\r
  72                         }\r
  73                 }\r
  74                 \r
  75                 [DefaultValue("")]\r
  76                 [WebCategory("Navigation")]\r
  77                 [DesignerSerializationVisibility (DesignerSerializationVisibility.Hidden)]\r
  78                 public string Name{\r
  79                         get{\r
  80                                 string attr = Attributes["name"];\r
  81                                 if (attr != null) return attr;\r
  82                                 return String.Empty;\r
  83                         }\r
  84                         set{\r
  85                                 Attributes["name"] = AttributeToString(value);\r
  86                         }\r
  87                 }\r
  88                 \r
  89                 [DefaultValue("")]\r
  90                 [WebCategory("Navigation")]\r
  91                 [DesignerSerializationVisibility (DesignerSerializationVisibility.Hidden)]\r
  92                 public string Target{\r
  93                         get{\r
  94                                 string attr = Attributes["target"];\r
  95                                 if (attr != null) return attr;\r
  96                                 return String.Empty;\r
  97                         }\r
  98                         set{\r
  99                                 Attributes["target"] = AttributeToString(value);\r
 100                         }\r
 101                 }\r
 102                 \r
 103                 [DefaultValue("")]\r
 104                 [WebCategory("Appearance")]\r
 105                 [DesignerSerializationVisibility (DesignerSerializationVisibility.Hidden)]\r
 106                 public string Title{\r
 107                         get{\r
 108                                 string attr = Attributes["title"];\r
 109                                 if (attr != null) return attr;\r
 110                                 return String.Empty;\r
 111                         }\r
 112                         set{\r
 113                                 Attributes["title"] = AttributeToString(value);\r
 114                         }\r
 115                 }\r
 116                 \r
 117         } // class HtmlAnchor\r
 118 } // namespace System.Web.UI.HtmlControls\r
 119 \r