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

   1 //
   2 // System.Web.UI.HtmlControls.HtmlHead
   3 //
   4 // Authors:
   5 //      Chris Toshok (toshok@ximian.com)
   6 //
   7 // Copyright (C) 2005-2010 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;
  31 using System.Security.Permissions;
  32 using System.Web.UI.WebControls;
  33
  34 namespace System.Web.UI.HtmlControls
  35 {
  36         [ControlBuilder (typeof (HtmlEmptyTagControlBuilder))]
  37         public class HtmlLink: HtmlControl
  38         {
  39                 public HtmlLink () : base ("link")
  40                 {
  41                 }
  42
  43                 [DefaultValue ("")]
  44                 [UrlProperty]
  45                 [DesignerSerializationVisibility (DesignerSerializationVisibility.Hidden)]
  46                 public virtual string Href {
  47                         get {
  48                                 string s = Attributes["href"];
  49                                 if (s == null)
  50                                         return "";
  51                                 return s;
  52                         }
  53                         set {
  54                                 if (value == null)
  55                                         Attributes.Remove ("href");
  56                                 else
  57                                         Attributes["href"] = value;
  58                         }
  59                 }
  60
  61                 protected internal override void Render (HtmlTextWriter writer)
  62                 {
  63                         writer.WriteBeginTag (TagName);
  64                         RenderAttributes (writer);
  65                         writer.Write (" />");
  66                 }
  67
  68                 [MonoTODO ("why override?")]
  69                 protected override void RenderAttributes (HtmlTextWriter writer)
  70                 {
  71                         if (Href.Length > 0)
  72                                 Href = ResolveClientUrl (Href);
  73                         base.RenderAttributes (writer);
  74                 }
  75         }
  76 }
  77