Hi Kulbhushan,

Thank you for posting in the community.

If the matter is occurring only when your network is busy it may help increasing the timeout of your grid. Instructions on how this can be done can be found at:

http://forums.infragistics.com/forums/p/25369/92964.aspx

I would suggest that you test whether the issue is not occuring after attempting to load additional rows, after some other rows have been modified/added/deleted.

Regarding handling the exception and displaying a meaningful message to the users, you can handle the AjaxResponseError clientside event of the grid and cancel it (in order to not display the propagated exception to the users) and show your own message to the users in the form of an alert for instance.

function WebDataGrid1_Grid_AJAXResponseError(sender, eventArgs)
{
    eventArgs.set_cancel(true);
    alert("Network busy. Please reload the page");
}

Please let me know if this helps.

Hope this is useful for your help, Thanks