registering user controls in web.config, causes error if used in same directory...

[Tim_Mac]

Hi,
i have this in my web.config:
<pages validateRequest="false" >
<controls>
<add tagPrefix="uc1" src="/Whatever.ascx" tagName="Whatever"/>

i have this in Login.aspx:
<uc1:Whatever id="Blah" runat="server">

I get this error message:

Cannot use the user control '/Whatever.ascx', because it is registered in
web.config and lives in the same directory as the page.

this same message has been posted twice without answers on the forums at
www.asp.net
http://forums.asp.net/thread/1347796.aspx
http://forums.asp.net/thread/1253193.aspx

does anyone know what is going wrong?

i'm using a Web Application Project. the problem goes away when i move the
user control into a subdirectory and update the web.config reference etc.

thanks in advance
tim

 

[Walter Wang [MSFT]]

Hi Tim,

This limitation is documented in following MSDN library:

http://msdn2.microsoft.com/en-us/library/system.web.configuration.tagprefixi
nfo.aspx

This is due to internal design consideration (performance). The common use
of this new feature is to have a directory containing a bunch of user
controls, and register them in config so that they are available in all
pages. Thank you for your understanding.

Sincerely,
Walter Wang ([email protected], remove 'online.')
Microsoft Online Community Support

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[Tim_Mac]

great, that's not a problem to adopt this pattern in my apps.

thank you again
tim

 

[Rhywun]

The [controls] tag also doesn't work when used in a web.config file
that's in a subdirectory of the root directory, right?