How to prevent reposting of data before refresh?

Suppose there is button on which there is event for adding the total sum(there is coloumn Amount in gridview) and posting the data in gridview i.e update of gridview. I want that when user click on button it will update the gridview i.e data will inserted in geridview but it will not add current numeric value to the total sum unless user refr开发者_Python百科esh the page.

For this how to do? Please tell me.

You can use telerik's ASP.NET AJAX controls. Visit here http://www.telerik.com/products/aspnet-ajax/grid.aspx