public void PrepareGridViewForExport(Control gv)
{
Literal l = new Literal();
for (int i = 0; i < gv.Controls.Count; i++)
{
if (gv.Controls[i].GetType() == typeof(TextBox))
{
l.Text = (gv.Controls[i] as TextBox).Text;
gv.Controls.Remove(gv.Controls[i]);
gv.Controls.AddAt(i, l);
}
}
}