for (int i = 0; i < GrivdView.Rows.Count; i++)
{
CheckBox cBox = (CheckBox)grdUsers.Rows[i].Cells[1].FindControl("checkbox");
if (cBox != null)
{
}
RadioButton rButton = (RadioButton)grdUsers.Rows[i].Cells[2].FindControl("");
if (rButton != null)
{
}
}