Register Dlls Assembly Custom User Controls Ascx In ASP.NET

This post explains how to Register Assembly, Custom Controls, Dlls And User Control Ascx In Asp.Net 2.0,3.5,4.0. To register these we need to add reference in page directive of aspx html source

<%@ Register TagPrefix="MyControl" TagName="HeaderControl"

Src="Header.ascx" %>

<%@ Register TagPrefix="MyControl" TagName="footerControl"

Src="Footer.ascx" %>

<%@ Register TagPrefix="MyAssembly" Assembly="Myassembly" %>

Or like this

<%@ Register Assembly="AjaxControlToolkit"

             Namespace="AjaxControlToolkit"

             TagPrefix="ajaxToolkit" %>

But using this we need to register our ascx control or dll in every page we want to use , if we need to use control or dll in more than one page or in several pages than we can register controls and dlls in web.config file

<configuration>

    <system.web>

      <pages>

        <controls>

          <add tagPrefix="MyControl" src="~/Header.ascx" 

                                     tagName="HeaderControl"/>

          <add tagPrefix="ControlName" src="~/Footer.ascx" 

                                       tagName="FooterControl"/>

          <add tagPrefix="MyAssembly" assembly="MyAssembly"/>

          <add tagPrefix="asp" namespace="System.Web.UI" 

               assembly="System.Web.Extensions, 

               Version=3.5.0.0, Culture=neutral,

               PublicKeyToken=31BF3856AD364E35"/>

        </controls>

      </pages>

    </system.web>

</configuration>

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