The changes the user enters in some controls, are not reflected in the grid view after they submit changes. Why is that?

I'm working with VS 2012 and a standard Web Forms app. I've got a GridView on the page, and a few other controls to accept data from the user. Then within the click event of a button on the page I do some ADO.NET data interaction to call a stored procedure, populate the parameters and feed them to the stored procedure. It is saving the data fine, however, the changes aren't reflected in the grid view.
How do I get the changes to appear in the grid view?