.Net Custom Web Control Howto?

**rparnaso** · 08-05-2004, 02:10 PM

Hello all,

I am creating a custom web control and i would like the literal text between my custom tags to render when the control is loaded. Can someone show me a bare bone code snippet that can do this? You figure ASP.NET would make this easier to do but apparently its not. Here is what I have so far:

CustomControl.ascx.cs (C# source file)

Code:

using System;
using System.Web;
using System.Web.UI;

namespace MyControls {
   public class CustomControl : UserControl {
      private string _bgcolor;

      public string bgcolor{
         get { return _bgcolor; }
         set { _bgcolor= value; }
      }

      // Is this right???
      protected override void Render(HtmlTextWriter output) {
         if ( (HasControls()) && (Controls[0] is LiteralControl) ) {
            output.Write("<H2>Your Message: " + ((LiteralControl) Controls[0]).Text + "</H2>");
        }
     }

   }
}

This is CustomControl.ascx

Code:

<%@ Control Language="C#" Inherits="MyControls.CustomControl" Src="CustomControl.ascx.cs" Debug="true" %>
<table>
   <tr>
      <td bgcolor="<%= bgcolor%>"><!--literal text here--></td>
   </tr>
</table>

Finally here is the CustomControlExample.aspx file

Code:

<%@ page language="C#" %>
<%@ register tagprefix="ctrl" tagname="MyControls.CustomControl" src="CustomControl.ascx" %>
<html>
<body>
   <ctrl:CustomControl bgcolor="yellow" runat="server">
      This literal text should be displayed
   </ctrl:CustomControl>
</body>
</html>

**sdcdesign.co.uk** · 10-27-2004, 06:01 AM

um - never really tackled custom controls, but if you getting an error, change CustomControlEmail.aspx to this:

Code:

<%@ Page Language="C#" Register tagprefix="ctrl" tagname="MyControls.CustomControl" src="CustomControl.acsx" Debug="True" Trace="True" %>
<%@ import Namespace="System.Data" %>
<%@ import Namespace="System.IO" %>
<html>
<body>
   <ctrl:CustomControl bgcolor="yellow" runat="server">
      This literal text should be displayed
   </ctrl:CustomControl>
</body>
</html>

dunno if that will work but we can all try