I am experimenting with a couple of Ajax controls from the AjaxControlsToolkit. I have read quite a couple of articles about them, but you never know when to apply that knowledge you acquired by browsing around.
Well, today I hit a problem using a CalendarExtender in a FormView on an UpdatePanel:
After googling around and finding that I am the only one on the planet that experiences that problem, I remembered an article about Ajax traps and handling of asynchronous events.
It turned out that the page containing the UpdatePanel always triggered my session check, which would redirect to an error message in case the session had timed out.
The solution was to use a
every now and then, and it seems that did it😉