I am using v5.3. Have webgrid inside in AJAX Updatepanel.
Also have javascript to handle Cell Click. After page has been post, this event does not fire.
Fire only once before page posted. Works fine without Update panel.
@arkgroup
Try using the WebAsyncRefreshPanel instead of the AJAX UpdatePanel. I had this same problem, and that's how i fixed it.
I see that after partial postback the grid is losing its cell click events.
So in page_load try to add the cellclick event to grid everytime such that event gets attached to grid everytime page gets partial postbacked.
Hope this helps!!!