I am getting the error below when trying to build the web site project in Visual Studio 2010:
The page '/WebSite/controls/C2.ascx' cannot use the user control '/WebSite/controls/C1.ascx', because it is registered in web.config and lives in the same directory as the page.
I have 2 web user controls:
controls/C1.ascx
controls/C2.ascx
The controls have been registered in web.config:
<configuration>
<system.web>
<pages>
<controls>
<add src="~/controls/C1.ascx" tagPrefix="my" tagName="C1"/>
<add src="~/controls/C2.ascx" tagPrefix="my" tagName="C2"/>
</controls>
</pages>
</system.web>
</configuration>
C1.ascx contains just a static HTML, C2.ascx is trying to include C1:
C1.ascx contains just some plain static simple HTML. C2.ascx is trying to include C1.ascx:
<%@ Control Language="VB" %>
<my:C1 runat="server" />
<p>Hello from C2</p>
When trying to build the project, I am getting the error message at the top. I realise this issue can be fixed by adding another Register directive to C2.ascx...:
<%@ Register Src="~/controls/C1.ascx" TagPrefix="ctl" TagName="C1" %>
...but I'm wondering if there's a cleaner solution and why am I getting the error in the first place?
Your only possible solutions are to:
I personally think moving is the easiest, if it will work for your solutions. Second would be re-registering, even though annoying. Abstracting them out into a full code library is probably not worth the effort if this is the only reason you are doing it.
You could also put the controls into different folders. But I don't think this is much cleaner or better.
BTW: this behavior is by design, as you can read on this MSDN page (look for the yellow note almost at the end of the page).
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