Editable Datagrid

Hi!

I want my datagrid to be editable. I am using 'EditCommandColumn', which shows the Edit button. When the user clicks on it, it changes to Update and Cancel buttons. Its working fine. But, the user wants to edit the cells by double clicking it. Is it doable. If yes, then how? My Codebehind is c#.

Pls help.

Thanks.