Hi,
This blog post summarizes a best approach for registering UserControl or Custom Controls.
Old Approach:
In ASP.NET 1.x, to use both the custom server controls and user controls on a page, required to to add <%@ Register %> directives to the top of pages like so:
<%@ Register TagPrefix="scott" TagName="header" Src="Controls/Header.ascx" %>
<%@ Register TagPrefix="scott" TagName="footer" Src="Controls/Footer.ascx" %>
<%@ Register TagPrefix="ControlVendor" Assembly="ControlVendor" %>
<html>
<body>
<form id="form1" runat="server">
<scott:header ID="MyHeader" runat="server" />
</form>
</body>
</html>
Note: First two register directives above are for User-Controls (implemented in .ascx files), while the last is for a Custom Control compiled into an assembly .dll file.
New Approach:
ASP.NET 2.0 makes control declarations much cleaner and easier to manage. Instead of duplicating them on all your pages, just declare them once within the new pages->controls section with the web.config file of your application:
<?xml version="1.0"?>
<configuration>
<system.web>
<pages>
<controls>
<add tagPrefix="scottgu" src="~/Controls/Header.ascx" tagName="header"/>
<add tagPrefix="scottgu" src="~/Controls/Footer.ascx" tagName="footer"/>
<add tagPrefix="ControlVendor" assembly="ControlVendorAssembly"/>
</controls>
</pages>
</system.web>
</configuration>
Once you register the controls within the web.config file, you can then just use the controls on any page, master-page or user control on your site like so (no registration directives required):
<html>
<body>
<form id="form1" runat="server">
<scott:header ID="MyHeader" runat="server" />
</form>
</body>
</html>
Hope this helps.
Arun Manglick
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