c# - How to get which page threw an exception to Application_error in aspx

Question

I have a general exception handler, Application_error in my global.asax where I'm trying to isolate all the uncaught exceptions on all my many pages. I don't want to use Page_error to catch exception because it's inefficient to call that on so many pages. So where in the exception can I find what page actually caused the exception?

Answer 1

HttpContext con = HttpContext.Current;
con.Request.Url.ToString()