//retrive bay name
        public string getBayName(MySqlConnection conn, string bayN)
        {
            CentralStation centralStation = new CentralStation();
            string         bayName;
            string         sql     = "SELECT * FROM centralstation where centralStationName='" + bayN + "'";
            MySqlCommand   sqlComm = new MySqlCommand(sql, conn);

            try
            {
                MySqlDataReader myReader;
                myReader = sqlComm.ExecuteReader();
                if (myReader.Read())
                {
                    centralStation.Id = (int)myReader.GetValue(0);
                    centralStation.CentralStationName = (string)myReader.GetValue(1);
                }
                myReader.Close();
            }
            catch (Exception e)
            {
                Console.WriteLine(e.ToString());
            }

            bayName = centralStation.CentralStationName;
            return(bayName);
        }
        //list centralstation
        public List <CentralStation> getAllCentralStation(MySqlConnection conn)
        {
            List <CentralStation> listCentralStation = new List <CentralStation>();
            string       sql     = "SELECT * FROM centralstation";
            MySqlCommand sqlComm = new MySqlCommand(sql, conn);

            try
            {
                MySqlDataReader myReader;
                myReader = sqlComm.ExecuteReader();
                while (myReader.Read())
                {
                    CentralStation centralStation = new CentralStation();
                    centralStation.Id = (int)myReader.GetValue(0);
                    centralStation.CentralStationName = (string)myReader.GetValue(1);
                    listCentralStation.Add(centralStation);
                }
                myReader.Close();
            }
            catch (Exception e)
            {
                Console.WriteLine(e.ToString());
            }

            return(listCentralStation);
        }