I am working on a simple form to generate a report in Excel format. There are a few text boxes and date pickers and then a button. The event for the button runs a length SQL query and then creates an excel file with the results and presents the file using Response.OutputStream. The page in itself works fine but I'd like to add a RadAjaxLoadingPanel while the button event is working. I've tried at least a half dozen different methods and it seems all I can ever get is either the loading panel goes off but the file is never presented or nothing happens at all. Can someone point me to a demo or something that does this?
I've tried the AjaxLoadingPanel Demo and the AjaxLoadingPanel - Explicit Show/Hide