One possible way would be to have a common aspx stub page that will act as the host for ascx in a regular web form, call back on that page using the jquery $ .ajax () method with some arguments to indicate that which you want to download.
Then, on your stub / host page, override the rendering method and render the control directly to the output stream using response.output.write. The client callback handler will catch the output, and then it can be inserted into the DOM in the usual way or using the version of $ .load (), which allows you to specify the DOM element.
hope this helps.
Lee anderson
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