Scans your site and returns information about your SSL implementation and certificate. Helpful for debugging and validating your SSL configuration.
One of a set of tools we are providing to everyone as a way of saying thank you for being a part of the community.
If so just put the dropdown in it's own update panel (can be nested)
And call the update for that update panel.
http://www.codeproject.com/Articles/29617/Partial-update-of-parent-page-via-AJAX-ASP-NET-2-0
and
http://www.codeproject.com/Articles/36458/ASP-NET-parent-page-partial-refresh-after-closing