How to register custom server control on ASP.NET page

Question

I have a project and I am trying to register a custom server control (there is no .ascx file) on the page. I am currently using

Class Declaration

namespace MyApp.Controls{     public class CustomControl: WebControl{         public string Text         {             get             {                 String s = (String)ViewState["Text"];                 return ((s == null) ? String.Empty : s);             }             set             {                 ViewState["Text"] = value;             }         }                 protected override void RenderContents(HtmlTextWriter output)         {             output.Write(Text);         }     } } 

On my page,

<%@ Register TagPrefix="myControls" Namespace="MyApp.Controls" %> <myControls:CustomControl runat="server" Text="What up!" /> 

I receive a Parser Error, with the message "Unknown server tag 'myControls:CustomControl'."

What am I doing wrong?

Answer 1

Well, if this control is in another class library, or even if it's in the same one, it wouldn't be a bad idea to specify control's assembly in @Register:

<%@ Register TagPrefix="myControls" Namespace="MyApp.Controls" Assembly="MyApp" %> <myControls:CustomControl runat="server" Text="What's up!" /> 

Clean and rebuild your solution too in order to verify everything is compiled rightly!