添加电子称程序

定义一个委托：

delegate void ElectronicScales(string str);
ElectronicScales strc;

在初始化电子称：

       #region 电子称设置
        public void Electronic()
        {
            //初始化窗口程序接受电子秤信息
            try
            {
                serialPort1.PortName = "COM3";
                switch (Share.GetCompanyId())
                {
                    case 1:
                        serialPort1.BaudRate = 1200;
                        break;
                    default:
                        serialPort1.BaudRate = 2400;
                        break;
                }

                strc = new ElectronicScales(UpdateTextBox);
                serialPort1.DataReceived += new System.IO.Ports.SerialDataReceivedEventHandler(serialPort1_DataReceived);
                serialPort1.Close();

                serialPort1.Open();
            }
            catch
            {
            }
        }

        private void UpdateTextBox(string weight)
        {
            TrueWeight = int.Parse(weight);   //TrueWeight界面文本框
        }

        private void serialPort1_DataReceived(object sender, System.IO.Ports.SerialDataReceivedEventArgs e)
        {
            try
            {
                var strweight = "";
                Thread.Sleep(200);

                string com = serialPort1.ReadExisting();

                char[] ch = com.Substring(com.IndexOf("=") + 1, 6).ToCharArray();
                Array.Reverse(ch);
                strweight = Convert.ToInt32(new string(ch)).ToString();

                this.Invoke(strc, new string[] { strweight });
            }
            catch
            {

            }
        }

        #endregion

COM3是端口号，需要把带你呢的端口号设置成COM3