Hi Vinodh Kumar,
A simple example which illustrates how to open RadWindow when you click RadGrid's row is available here:
http://demos.telerik.com/aspnet-ajax/controls/examples/integration/gridandwindow/defaultcs.aspx?product=window
You can open a RadWindow on the client via the radopen client-side method. You can find more about it in the following help article:
http://www.telerik.com/help/aspnet-ajax/window_programmingopening.html
The code below illustrates how to open more than a one RadWindows once a button is clicked
Let us know if you have any other questions.
Regards,
Petio Petkov
the Telerik team
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