Show GridViews at Initial PageLoad

[snufse]

I have an application where I currently are calling stored procedures, reading tables and filling GridView at PageLoad (If Not IsPostBack Then ...). The process takes some time and leaves the client waiting for this process to be completed even before showing the page.

Now, is there a way where I can open the page, show a hour glass (or similar) and then automatically fill the gridviews? Is this where I should use threading (or backgroundworker) ?

Thank you.