If I understand your screenshot and explanations correctly you have:
- a main page that opens a RadWindow with a grid in it
- the grid opens another RadWindow inside the first one to edit/update records
- you want to close the second RadWindow and change the URL of the first
If this is the case you can attach to the OnClientClose event
of the second RadWindow, take the argument you can pass when closing it (see this demo
for another example) and set the window.location.href property to the current URL plus the desired querystring you have just obtained from the RadWindow's argument. This will refresh the page with the grid and provide the required querystring to the server.
If there isn't a first RadWindow, but the grid is directly on the main page the same approach will still work.
the Telerik team
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