ASP.NET Tutorial/Custom Controls/TextBox

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Smart box

   <source lang="csharp">

<%@ Register TagPrefix="sp" TagName="SmartBox" 

   Src="Control.ascx" %>

<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Strict//EN" 

   "http://www.w3.org/TR/xhtml1/DTD/xhtml1-strict.dtd">

<html> 

 <head>
   <title>Creating ASP.NET Web Server Controls</title>
   <script runat="server" language="C#">
     protected void Page_Load()
     {
       nameSb.LabelText = "Name:";
       addressSb.LabelText = "Address:";
       countrySb.LabelText = "Country:";
       phoneSb.LabelText = "Phone:";
     }
   </script>
 </head>
 <body>
   <form id="Form1" runat="server">
     <sp:SmartBox id="nameSb" runat="server" LabelText="Name:" />
     <sp:SmartBox id="addressSb" runat="server"
         LabelText="Address:" />
     <sp:SmartBox id="countrySb" runat="server"
         LabelText="Country:" />
     <sp:SmartBox id="phoneSb" runat="server"
         LabelText="Phone:" />
   </form>
 </body>

</html> File: Control.ascx <script runat="server" language="C#"> 

 public string LabelText 
 {
   set
   {
     myLabel.Text = value;
   }
 }
 public string Text
 {
   get
   {
     return myTextBox.Text;
   }
 }

</script> 

 <asp:Label ID="myLabel" runat="server" Text="" Width="100" />
 <asp:TextBox ID="myTextBox" runat="server" Text="" Width="200"
     MaxLength="20" /></source>

Smart box (VB)

   <source lang="csharp">

<%@ Register TagPrefix="sp" TagName="SmartBox" 

   Src="Control.ascx" %>

<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Strict//EN" 

   "http://www.w3.org/TR/xhtml1/DTD/xhtml1-strict.dtd">

<html> 

 <head>
   <title>Creating ASP.NET Web Server Controls</title>
   <script runat="server" language="VB">
     Protected Sub Page_Load()
       nameSb.LabelText = "Name:"
       addressSb.LabelText = "Address:"
       countrySb.LabelText = "Country:"
       phoneSb.LabelText = "Phone:"
     End Sub
   </script>
 </head>
 <body>
   <form id="Form1" runat="server">
     <sp:SmartBox id="nameSb" runat="server" LabelText="Name:" />
     <sp:SmartBox id="addressSb" runat="server"
         LabelText="Address:" />
     <sp:SmartBox id="countrySb" runat="server"
         LabelText="Country:" />
     <sp:SmartBox id="phoneSb" runat="server"
         LabelText="Phone:" />
   </form>
 </body>

</html> File: Control.ascx <script runat="server" language="VB"> 

 Public WriteOnly Property LabelText() As String
   Set(ByVal value As String)
     myLabel.Text = value
   End Set
 End Property
 
 Public ReadOnly Property Text() As String
   Get
     Text = myTextBox.Text
   End Get
 End Property

</script> 

 <asp:Label ID="myLabel" runat="server" Text="" Width="100" />
 <asp:TextBox ID="myTextBox" runat="server" Text="" Width="200"
     MaxLength="20" /></source>
Источник — «http://nfex.ru/index.php?title=ASP.NET_Tutorial/Custom_Controls/TextBox&oldid=3317»