Compile Web User Control to Custom Control namespace name could not be found?

Question

Example aspx code:

my sample code

<%@ Register TagPrefix="XF" Namespace="MyNameSPace" %>

i want to register the tag in my controls, but why it said the namespace could not be found? any ideal?

Answer 1

You are either missing the assembly attribute or you are trying to register a usercontrol without the src attribute:

Real world working examples from a current project of mine:

A user control (.ascx):

<%@ Register TagPrefix="uc1" TagName="FooDialog" Src="FooDialog.ascx" %>

A webcontrol (defined in a class with no designer file):

<%@ Register TagPrefix="ie" Namespace="Microsoft.Web.UI.WebControls" Assembly="Microsoft.Web.UI.WebControls" %>