public String getNameGiaoVienByMa(String maGV)
        {
            String    name      = "";
            DataTable dataTable = new DataTable();

            dataTable = _GiaoVienDAO.getGiaoVienByMa(maGV);
            if (dataTable != null)
            {
                foreach (DataRow dr in dataTable.Rows)
                {
                    name = dr[1].ToString();
                }
            }

            return(name);
        }