Also is it possible to change (server-side) any other control during WebDataGrid AJAX calls? For example I have a DIV control (with runat="server" set) and during grid paging I perform some additional server-side operations (database calls etc.) and I want to set innerHTML property of that div server-side. Again it's possible in UpdatePanel. Old WARP panel even had "RelatedControls" property which it could update even if they weren't inside of panel.
How to achieve something similar during grid partial postbacks?
Got it: http://codecorner.galanter.net/2011/05/02/affecting-page-during-webdatagrid-ajax-calls/