Notice that the display does not flash on this screen because the navigational components are not reloaded. Only the updated fields within the FormView are loaded. You get to see a message however indicating when a process is connecting to the server.
This is accomplished by adding a few tags (out of the box) of MS ASP.NET AJAX around the FormView. In the next demo, I go one step further by using an MS ASP.NET AJAX extender named CascadingDropDown.