Hi Pandiya,
As far as I understand the problem comes from the fact that you do not update and rebind the grid. What I can suggest is to use RadAjaxManager and its ajaxRequest method to do so - a very detailed and similar to your scenario is shown below:
http://demos.telerik.com/aspnet-ajax/controls/examples/integration/gridandwindow/defaultcs.aspx?product=window
On a side note, when you install RadControls, our online examples projects are automatically installed on your computer and you can not only examine their full source code, but also extend them further in order to meet your requirements.
You can open the demos from here:
Start\Programs\Telerik\RadControls for ASPNET AJAX\Open Sample WebSite In VisualStudio
The actual location on your hard disk is the following one:
C:\Program Files\Telerik\RadControls for ASPNET AJAX \Live Demos
Regards,
Svetlina Anati
the Telerik team
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