public static Boolean GetParameters(string exception = "")
        {
            try
            {
                //query
                string query = string.Format("Select * from THAMSO");

                //excute reader
                MySqlDataReader reader = DatabaseConnectionDAO.ExcuteQuery(query, exception);

                //if there is no exception
                if (exception == "")
                {
                    //get Parameters
                    while (reader.Read())
                    {
                        ThamSoDTO.SoTienNoToiDa    = decimal.Parse(reader.GetString("SoTienNoToiDa"));
                        ThamSoDTO.SoXeSuaChuaToiDa = decimal.Parse(reader.GetString("SoXeSuaChuaToiDa"));
                        ThamSoDTO.SuDungQuyDinh4   = bool.Parse(reader.GetString("SuDungQuyDinh4"));
                    }
                    return(true);
                }
            }
            catch (Exception ex)
            {
                exception = ex.Message;
            }
            return(false);
        }
        public static Boolean UpdateParameters(string exception = "")
        {
            try
            {
                //query
                string query = string.Format("update THAMSO set SUDUNGQUYDINH4 = {0}, " +
                                             "SOTIENNOTOIDA = {1}, SOXESUACHUATOIDA = {2}", ThamSoDTO.SuDungQuyDinh4, ThamSoDTO.SoTienNoToiDa, ThamSoDTO.SoXeSuaChuaToiDa);

                //excute reader
                MySqlDataReader reader = DatabaseConnectionDAO.ExcuteQuery(query, exception);

                if (exception == "")
                {
                    return(true);
                }
            }
            catch (Exception ex)
            {
                exception = ex.Message;
            }
            return(false);
        }