Telerik RadGrid can be easily set to work entirely in AJAX mode. As a result all internal
operations of the grid (Inserting/Editing/Updating/Deleting/Paging/Filtering/Sorting and Grouping)
are being performed in the background using AJAX requests instead of full postbacks.
The AJAX mode of Telerik RadGrid dramatically improves the performance of the component,
simulating the responsiveness of desktop applications.
To enable the AJAX mode all you need to do is set a single property (EnableAJAX) to true.
Additional information for the AJAX functionality of the grid you can find below:
AJAX in Telerik RadGrid