Updating Gridview

Question

I have a simple page where I am trying to update some elements of a row. I am able to get to the point when I press the EDIT button, the gridview_updating event is fired and I have place my custom sql to update the table using the values entered on that row. The problem is I am not able to access the NEW values enetered on the screen. This is a simple gridview with no templates. I am dynamically generating the sql to display the data on screen. I am able to access the old values when I place the following code in gridview1_rowUpdating event handler.
f1 = ((TextBox)GridView1.Rows[e.RowIndex].Cells[1].Controls[0]).Text;
f2 = ((TextBox)GridView1.Rows[e.RowIndex].Cells[2].Controls[0]).Text;
f3 = ((TextBox)GridView1.Rows[e.RowIndex].Cells[3].Controls[0]).Text;
 
I was expecting it to be straight forward to get the new values eneterd on the screen.  I am relatively new to ASP so could someone please help me in providing a simple way in retrieving the new values in the edit row.
 
Thanks
Ivan