Opening excel files from the internet opens a blank excel window

Question

A method in dumping a GridView to an Excel file to download/open from the internet was recently broken with new Windows Updates.

My code dumps from a GridView to an

Answer 1

Just thought I'd mention there is a third solution:

Add the site generating the .xls to your Trusted Sites list. I had to add about a dozen websites via GPO, because our CIO is refusing to roll back the KB... =(