Generation of designer file failed unknown server tag ajax

Remove From My Forums. Asked by:. Archived Forums. NET development. Questions for all versions are welcome here. Sign in to vote. Any idea why Visual Studio is having this issue? Thanks, Graham. Monday, April 16, PM. User posted Do you also have a reference to system. Wednesday, May 2, AM. Wednesday, May 2, PM.

User posted Answer to the problem of Ajax is next: I did not install the items in the toolbox so the designer IDE did not find them. Thursday, May 3, AM.

User posted What instructions are you referring to? I am still getting the errors: Generation of designer file failed: Unknown server tag 'asp:ScriptManager' and Generation of designer file failed: Unknown server tag 'asp:WebPartManager' on any page that contains those controls. Friday, May 11, PM. Mine works now though. Then , you can use the Ajax controls like this. The dll was in the bin directory, which is why it was running correctly. I tried this before my original post and it did not fix the problem.

This time, after I restarted VS , it worked for some strange reason. The reference should be added to the project when the control is added to the page, I'm not sure why this happened.

But at least it is fixed. Turned out it was a SourceSafe project check-out issue that caused the reference to not be added. The content you requested has been removed. Ask a question.

Find centralized, trusted content and collaborate around the technologies you use most. Connect and share knowledge within a single location that is structured and easy to search. I am trying to convert a website to a web application project.

So what could be the work around to fix this issue???? Configure your tag prefix in web. It's fine even if you keep it in the page itself. Make sure you have a reference to the AjaxControlToolkit in your application and change the assembly name to that of the web application that contains the controls just during the conversion:.

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