RadControls for ASP.NET AJAX
There are cases in which you may want to reduce the grid ViewState though you have enabled
multiple server/client side features of the control (thus bypassing the EnableViewState = false choice
with its limitations). In such situation to
work properly with the NeedDataSource advanced data-binding or population through
data source control, Telerik RadGrid's ViewState has to be turned on.
Still, a possible solution for ViewState reduction is to relocate it in a Session variable. The code below illustrates how to apply this technique under ASP.NET 2.x or 3.x: ASP.NET 2.x/3.x:
Further information on this subject can be found in the MSDN articles linked below: