C# - Receive Error 'Unknown Server Tag' With Page.ParseControl On A Custom Server Control

Aug 4, 2010

I'm building a dynamic form using XML and XSLT. Anyway I'm using a custom asp.net control for CKEditor, it's an HTML editor.

When I try to add the controls from the XSLT using Page.ParseControl(<the-string-from-the-xslt-here>), I get a warning saying:

Unknown server tag 'FCKeditor.CKEditor'

And of course, if I remove the control from the XSLT everything is working fine and all the regular asp.net controls like TextBox etc get rendered to the string just fine. Does anyone know what I can do about it?

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