Someone asked on ASP.NET forums that how you can display a running total inside the GridView control. I thought it would be a exercise to implement a simple application that keeps a running total. You can implement the running total in different ways but I think the best way is that when you enter the number in the TextBox it should be added to the total. In this way you don't need to do any postback and hence you don't need to wait. I have implemented the running total application which can be viewed at the following link.

The download files are also included at the end of the article.