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

//串口通讯类
public class SerialPortManager
{

    //声明一个静态的串口资源
    private SerialPort ComDevice = new SerialPort();
    public SerialPortManager()
    {
        var portList = SerialPort.GetPortNames();//获取当前搜索到的串口集合
        ComDevice.DataReceived += new SerialDataReceivedEventHandler(Com_DataReceived); //绑定事件，接收到串口数据时触发
    }

    /// <summary>
    /// 打开和关闭串口，
    /// 前端放个按钮调用这个方法
    /// 串口名称用SerialPort.GetPortNames()拉取所有串口，上面构造有写
    /// 下面相关的参数具体有些哪些百度下就知道了，这块只是举例,当然也可以直接用
    /// </summary>
    /// <param name="serialPortName">串口名称</param>
    /// <returns></returns>
    public void openOrCloseSerialPort(string serialPortName)
    {
        //判断当前状态是打开还是关闭，开启的话就关闭，反之就开启
        if (ComDevice.IsOpen == false)
        {
            //设置串口名称
            ComDevice.PortName = serialPortName;
            //设置波特率  
            ComDevice.BaudRate = 115200;
            //设置数据位　
            ComDevice.DataBits = 8;
            //校验位设置 
            ComDevice.StopBits = StopBits.One;
            //停止位设置
            ComDevice.Parity = Parity.None;
            //开启串口
            ComDevice.Open(); 
        }
        else
        {
            ComDevice.Close();//关闭串口
        }
    }

    /// <summary>
    /// 串口数据读取方法，在构造时已经监听 
    /// </summary>
    private void Com_DataReceived(object sender, SerialDataReceivedEventArgs e)
    {
        byte[] ReDatas = new byte[ComDevice.BytesToRead];
        ComDevice.Read(ReDatas, 0, ReDatas.Length);
        //接收到的字节流
        var data = ReDatas; 
        //根据自己需求转换 
        var str = new UTF8Encoding().GetString(ReDatas);
    }

    /// <summary>
    /// 发送数据方法
    /// </summary>
    /// <param name="data">需要发送的字节流</param>
    public void Com_SendData(byte[] data)
    {
        if (ComDevice.IsOpen)
        {
            ComDevice.Write(data, 0, data.Length);//发送数据
        }
    }
}