If you're looking for an AJAX solution you can use the MS AJAX tools, which in my opinion are okay, or you can use Anthem.Net. This is a free control set that provides you with all the standard .Net controls but with the AJAX built in. They are very easy to use and require absolutely no AJAX coding or setup. Just drag and drop the control onto your web form and use it like you would any other ASP.Net control. There are some extra options with these that allow you to use the AJAX features. One of AutoUpdateAfterPostback, if you set this to True then this control will refresh itself. I have used these controls in a number of projects and they are definitely worth a look. I love 'em and recommend them over the MS AJAX controls. If you're interested check them out by Clicking Here.