mcs/class/System.Web/System.Web.UI.WebControls/HyperLink.cs

   1 /**\r
   2  * Namespace: System.Web.UI.WebControls\r
   3  * Class:     HyperLink\r
   4  * \r
   5  * Author:  Gaurav Vaish\r
   6  * Maintainer: gvaish@iitk.ac.in\r
   7  * Contact: gvaish@iitk.ac.in, myscripts_2001@yahoo.com\r
   8  * Implementation: yes\r
   9  * Status:  100%\r
  10  * \r
  11  * (C) Gaurav Vaish (2001)\r
  12  */\r
  13 \r
  14 namespace System.Web.UI.WebControls\r
  15 {\r
  16         public class HyperLink: WebControl\r
  17         {\r
  18                 public HyperLink(): base()\r
  19                 {\r
  20                 }\r
  21                 \r
  22                 public virtual string ImageUrl\r
  23                 {\r
  24                         get\r
  25                         {\r
  26                                 object o = ViewState["ImageUrl"];\r
  27                                 if(o!=null)\r
  28                                         return (string)o;\r
  29                                 return String.Empty;\r
  30                         }\r
  31                         set\r
  32                         {\r
  33                                 ViewState["ImageUrl"] = value;\r
  34                         }\r
  35                 }\r
  36                 \r
  37                 public string NavigateUrl\r
  38                 {\r
  39                         get\r
  40                         {\r
  41                                 object o = ViewState["NavigateUrl"];\r
  42                                 if(o!=null)\r
  43                                         return (string)o;\r
  44                                 return String.Empty;\r
  45                         }\r
  46                         set\r
  47                         {\r
  48                                 ViewState["NavigateUrl"] = value;\r
  49                         }\r
  50                 }\r
  51                 \r
  52                 public string Target\r
  53                 {\r
  54                         get\r
  55                         {\r
  56                                 object o = ViewState["Target"];\r
  57                                 if(o!=null)\r
  58                                         return (string)o;\r
  59                                 return String.Empty;\r
  60                         }\r
  61                         set\r
  62                         {\r
  63                                 ViewState["Target"] = value;\r
  64                         }\r
  65                 }\r
  66                 \r
  67                 public virtual string Text\r
  68                 {\r
  69                         get\r
  70                         {\r
  71                                 object o = ViewState["Text"];\r
  72                                 if(o!=null)\r
  73                                         return (string)o;\r
  74                                 return String.Empty;\r
  75                         }\r
  76                         set\r
  77                         {\r
  78                                 ViewState["Text"] = value;\r
  79                         }\r
  80                 }\r
  81                 \r
  82                 protected override void AddAttributesToRender(HtmlTextWriter writer) : AddAttributesToRender(writer)\r
  83                 {\r
  84                         if(NavigateUrl.Length > 0)\r
  85                         {\r
  86                                 writer.AddAttribute(HtmlTextWriterAttribute.Href, NavigateUrl);\r
  87                         }\r
  88                         if(Target.Length > 0)\r
  89                         {\r
  90                                 writer.AddAttribute(HtmlTextWriterAttribute.Target, Target);\r
  91                         }\r
  92                 }\r
  93                 \r
  94                 protected override void AddParsedSubObject(object obj)\r
  95                 {\r
  96                         if(HasControls())\r
  97                         {\r
  98                                 base.AddParsedSubObject(obj);\r
  99                                 return;\r
 100                         }\r
 101                         if(obj is LiteralConrol)\r
 102                         {\r
 103                                 Text = ((LiteralControl)obj).Text;\r
 104                                 return;\r
 105                         }\r
 106                         if(Text.Length > 0)\r
 107                         {\r
 108                                 base.AddParsedSubObject(Text);\r
 109                                 Text = String.Empty;\r
 110                         }\r
 111                         AddParsedSubObject(obj);\r
 112                 }\r
 113                 \r
 114                 protected override void LoadViewState(object savedState)\r
 115                 {\r
 116                         if(savedState != null)\r
 117                         {\r
 118                                 base.LoadViewState(savedState);\r
 119                                 object o = ViewState["Text"];\r
 120                                 if(o!=null)\r
 121                                         Text = (string)o;\r
 122                         }\r
 123                 }\r
 124                 \r
 125                 protected override void RenderContents(HtmlTextWriter writer)\r
 126                 {\r
 127                         if(ImageUrl.Length > 0)\r
 128                         {\r
 129                                 Image img = new Image();\r
 130                                 img.ImageUrl = ResolveUrl(ImageUrl);\r
 131                                 if(ToolTip.Length > 0)\r
 132                                         img.ToolTip = ToolTip;\r
 133                                 if(Text.Length > 0)\r
 134                                         img.AlternateText = Text;\r
 135                                 img.RenderControl(writer);\r
 136                                 return;\r
 137                         }\r
 138                         if(HasControls())\r
 139                         {\r
 140                                 base.RenderControl(writer);\r
 141                                 return;\r
 142                         }\r
 143                         writer.Write(Text);\r
 144                 }\r
 145         }\r
 146 }\r