public void itemTest()
        {
            itemController ic = new itemController();

            DateTime dt          = DateTime.Now;
            string   currentDate = dt.Year.ToString("0000") + dt.Month.ToString("00") + dt.Day.ToString("00") + dt.Hour.ToString("00") + dt.Minute.ToString("00") + dt.Second.ToString("00");

            ic.InsertData(1001, 1, "device1", 10, "1000", "1100", currentDate, "des1");
            ic.InsertData(1002, 1, "device2", 20, "2000", "2100", currentDate, "des2");
            ic.InsertData(1003, 1, "device3", 30, "3000", "3100", currentDate, "des3");
            ic.SelectData(3);
            ic.UpdateData(3, 1003, 1, "device3", 30, "4000", "4100", currentDate, "des3");
            ic.DeleteData(1);
        }