Question

I am using a Telerik RadGrid in ASP.Net framework. I create Buy procedure and when I press (Buy) it must subtract 1 from the column quantity. It works correctly but if I press F5 or refresh, it continues subtracting 1 by 1. Every refresh subtracts 1 from the quantity. How can i prevent that? image description here

Answer 1

When you hit the refresh button after you submit, the browser will attempt to send the same values (via a POST method) to your site, and will usually ask you for confirmation before doing so.

If you wish to avoid this from happening, you can try the following:

• Send the user to another page (therefore hitting refresh will simply refresh the page)
• Maintain some state that the action occurred, and prevent your code from running again. You could do that with a cookie or a session variable, perhaps.