Hello Jarrett,
The RadWindow (and RadWindowManager, and thus the RadAlert, RadConfirm and RadPrompt) are entirely client-side objects. Their purpose is to allow rich user interaction while not weighing down the page with markup - each popup is created via javaScript when it is opened. This means that they do not have server rendering and therefore cannot have server events. This is a main concept of the control and this is the reason why there isn't a built-in server event handler for the confirmation. You can easily use a regular RadWindow with server buttons as I showed in my previous post here, or you can
invoke an AJAX request via a RadAjaxManager or a
full postback from a (hidden) button in the callback function (which can actually also be an AJAX request if the button is inside an update panel).
All the best,
Marin
the Telerik team
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