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

   1 //
   2 // System.Web.UI.WebControls.Label.cs
   3 //
   4 // Authors:
   5 //   Gaurav Vaish (gvaish@iitk.ac.in)
   6 //   Andreas Nahr (ClassDevelopment@A-SoftTech.com)
   7 //
   8 // (C) Gaurav Vaish (2002)
   9 // (C) 2003 Andreas Nahr
  10 //
  11 \r
  12 using System;\r
  13 using System.ComponentModel;
  14 using System.ComponentModel.Design;\r
  15 using System.Web;\r
  16 using System.Web.UI;\r
  17 \r
  18 namespace System.Web.UI.WebControls\r
  19 {\r
  20         [DefaultProperty("Text")]\r
  21         [Designer("System.Web.UI.Design.WebControls.LabelDesigner, " + Consts.AssemblySystem_Design, typeof (IDesigner))]\r
  22         [DataBindingHandler("System.Web.UI.Design.TextDataBindingHandler, " + Consts.AssemblySystem_Design)]\r
  23         [ControlBuilder(typeof(LabelControlBuilder))] \r
  24         [ParseChildren(false)]\r
  25         [ToolboxData("<{0}:Label runat=\"server\">Label</{0}:Label>")]\r
  26         public class Label : WebControl\r
  27         {\r
  28                 public Label (): base ()\r
  29                 {\r
  30                 }\r
  31 \r
  32                 internal Label (HtmlTextWriterTag tagKey) : base (tagKey)\r
  33                 {\r
  34                 }\r
  35
  36                 [DefaultValue (""), Bindable (true), WebCategory ("Appearance")]
  37                 [PersistenceMode (PersistenceMode.InnerDefaultProperty)]
  38                 [WebSysDescription ("The text that should be shown on this Label.")]\r
  39                 public virtual string Text\r
  40                 {\r
  41                         get {\r
  42                                 object o = ViewState ["Text"];\r
  43                                 return (o == null) ? String.Empty : (string) o;\r
  44                         }\r
  45 \r
  46                         set { ViewState ["Text"] = value; }\r
  47                 }\r
  48 \r
  49                 protected override void AddParsedSubObject (object obj)\r
  50                 {\r
  51                         if(HasControls ()){\r
  52                                 base.AddParsedSubObject (obj);\r
  53                                 return;\r
  54                         }\r
  55 \r
  56                         if(obj is LiteralControl){\r
  57                                 Text = ((LiteralControl) obj).Text;\r
  58                                 return;\r
  59                         }\r
  60 \r
  61                         if(Text.Length > 0){\r
  62                                 base.AddParsedSubObject (new LiteralControl (Text));\r
  63                                 Text = String.Empty;\r
  64                         }\r
  65 \r
  66                         base.AddParsedSubObject (obj);\r
  67                 }\r
  68 \r
  69                 protected override void LoadViewState (object savedState)\r
  70                 {\r
  71                         if(savedState != null) {\r
  72                                 base.LoadViewState (savedState);\r
  73                                 string savedText = ViewState ["Text"] as string;\r
  74                                 if(savedText != null)\r
  75                                         Text = savedText;\r
  76                         }\r
  77                 }\r
  78 \r
  79                 protected override void RenderContents (HtmlTextWriter writer)\r
  80                 {\r
  81                         if(HasControls ())\r
  82                                 base.RenderContents (writer);\r
  83                         else\r
  84                                 writer.Write (Text);\r
  85                 }\r
  86         }\r
  87 }\r