The following demo shows a very similar scenario: http://demos.telerik.com/aspnet-ajax/controls/examples/integration/gridandwindow/defaultcs.aspx?product=window
. The point is that some code must be added that will initiate the request. In the demo it is the refreshGrid() function in the main page that is called from within the RadWindow. You can also use the OnClientClose event
of the control to always execute some code after the popup is closed. This help article
may be useful in case you are using the ContentTemplate, so you can properly use AJAX with it. In case you load entire pages in the RadWindows you may need the approach from this one
to call a function in the appropriate page in order to initiate the postback there.
the Telerik team
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