HKCard/HKCardOUT/COM/COMHelper.cs

using HKCardOUT.Helper;
using System;
using System.Collections.Generic;
using System.IO.Ports;
using System.Text;

namespace COM
{
    public class COMHelper : Singleton<COMHelper>
    {
        public SerialPort serialPort;
        public void OpenCOM()
        {
            serialPort = new SerialPort("COM3", 9600, Parity.None, 8, StopBits.One);
            //数据接收
            serialPort.DataReceived += new SerialDataReceivedEventHandler(DataReceived);
            serialPort.ReceivedBytesThreshold = 1;
            serialPort.RtsEnable = true;
            try
            {
                if (serialPort.IsOpen) return;
                serialPort.Open();
            }
            catch { }
        }
        /// 数据接收事件
        private void DataReceived(object sender, SerialDataReceivedEventArgs e)
        {
            byte[] readBuffer = new byte[serialPort.ReadBufferSize];
            serialPort.Read(readBuffer, 0, readBuffer.Length);
            string str = Encoding.Default.GetString(readBuffer);
        }
    }
}