獲取串口數據，設置串口

        /// <summary>
        /// 提交结果
        /// </summary>
        /// <returns></returns>
        private void SubmitData()
        {
            string Port = this.txtCardReadPort.SkinTxt.Text.Trim();
            string Torque = this.txtNiuli.SkinTxt.Text.Trim();//扭力
            string path = Application.StartupPath + "\\setup.ini";//保存地址

            FileInfo file = new FileInfo(path);
            if (file.Exists == false)//如果文件不存在，就創建文件
            {
                File.AppendAllText(path, "[IDCard]\r\n", Encoding.Default);
                File.AppendAllText(path, "CARD_COMPORT=1\r\n");
             
                File.AppendAllText(path, "[IDTorque]\r\n", Encoding.Default);
                File.AppendAllText(path, "CARD_COMTorque=1\r\n");
            }
            try
            {
                this._iniManager.Write("IDCard", "CARD_COMPORT", Port);
                this._iniManager.Write("IDTorque", "CARD_COMTorque", Torque);
                MessageBox.Show(LanguageHelper.rm.GetString("Common_SuccessfulOperation"));
                this.Close();
            }
            catch (Exception ex)
            {
                MessageBox.Show(ex.Message.ToString());
            }
        }

         //全局串口事件
        
private SerialPort comm = new SerialPort();

 //獲取串口設置的端口號，並且打開串口
        private bool CardReaderEvent()
        {
            try
            {
                //獲取串口號
                string cardComport = iniManager.ReadValue("IDCard", "CARD_COMPORT");//COM4
                //串口號轉為數字
                int port = int.Parse(cardComport); 
                //打開串口
              
                    comm.PortName = "COM" + com;
                    comm.BaudRate = 19200;
                   comm.DataBits = 8;
                    comm.StopBits = StopBits.One;
                    comm.Parity = Parity.None;
                  comm.WriteTimeout = SerialPort.InfiniteTimeout;
                    comm.ReadTimeout = SerialPort.InfiniteTimeout;
                    comm.Handshake = Handshake.None;
                    comm.RtsEnable = true;
                   comm.DtrEnable = true;
 　　　　　　　　　　　　 if (comm.IsOpen)
                        {
                            comm.Close();//關閉串口
                        }
                   comm.Open();
                    comm.DataReceived += new SerialDataReceivedEventHandler(comm_SerialPort_ReceiveData);              
            }
            catch (Exception ex)
            {
                MessageBox.Show(ex.Message.ToString());
                return false;
            }
        }
        //實時獲取打卡數據
        private void comm_SerialPort_ReceiveData(object sender, UUTSystem_Global.Common.ReceiveDataEventArgs e)
        {
            if (e != null)
            {
                //e.CommDatab表示獲取的串口返回數據
                string cardId = e.CommData;
                if (!string.IsNullOrEmpty(cardId))
                {
                    if (cardId != "")
                    {
                        //去除串口返回數據的空格和換行符
                        cardId = cardId.Replace("\r", "");
                        cardId = cardId.Replace("\n", "");
                        //由于是打卡所以只截取十位卡号
                        string value = cardId.Substring(cardId.Length - 10);
                        //使用委托才能修改页面UI
                        this.SetTxtIdCardNum(value);
                    }
                }
            }
        }
        //關閉串口
        private void CommClose()
        {  
          　　　　　　　　  if(comm.IsOpen) {
                            comm.Close();//關閉串口
                        }
        }