If you are looking to group your grid view results and provide summaries such as totals, etc. I found a great utility for grouping GridView results. It is a set of classes that provide a helper for your grids to allow grouping. The component is super easy to use just remember that if you don't use a data source control you have to handle the GridView Sorting event. You don't actually have to have any code in the event handler, just handle the event.