Custom Server Controls :: Unable To Use A Web User Control Inside Another Web User Control

Mar 10, 2011

I have a web user control that represents a simple message box. It is used to display simple messages like "Item has been deleted", or "The item was saved successfully".

On the other hand, I have another web user control that represents the item in the form of an editable form (I made this a user control because this is used in two different pages). I want to embed an instance of the message box user control inside the editable form. I am writing this right after the @Control directive:

[Code]....

Instead of using @Register directives, I register the user controls in web.config and so far this has worked just fine.

With the above markup, the project compiles, but whenever I try to navigate to a page that contains this construct, I get an HttpParseException exception. Furthermore, Visual Studio states that the tack w7rc9:MessageBox doesn't represent a known control.

What am I doing wrong?

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