I am using updatepanel on page. Button is in AsyncPostBackTrigger.
I got error :
Sys.WebForms.PageRequestManagerParserErrorException: Sys.WebForms.PageRequestManagerParserErrorException: The message received from the server could not be parsed. Common causes for this error are when the response is modified by calls to Response.Write(), response filters, HttpModules, or server trace is enabled. Details: Error parsing near ' <!DOCTYPE html PUB'.
If I use butting in PostBackTrigger then it works fine. But because of some conditions on page, I need to use button AsyncPostBackTrigger only. So is there anyother solution available ???