采用中断方式的数据接收

using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Text;
using System.Threading;
using System.IO.Ports;
using System.Windows.Forms;

namespace WindowsApplication6
{
    public partial class Form1 : Form
    {
        public delegate void HandleInterfaceUpdateDelegate(string text);
        private HandleInterfaceUpdateDelegate interfaceUpdateHandle;

        public Form1()
        {
            InitializeComponent();
        }
        private void UpdateLabel(string text)
        {
            this.RevBox.Text = text;
        }

        private void Form1_Load(object sender, EventArgs e)
        {
            serialPort.BaudRate = 9600;
            serialPort.PortName = "COM1";
            if (!serialPort.IsOpen)
            {
                serialPort.Close();
                serialPort.Open();
            }
            interfaceUpdateHandle = new HandleInterfaceUpdateDelegate(UpdateLabel);
            serialPort.DataReceived += new SerialDataReceivedEventHandler(serialPort_DataReceived);
            serialPort.ReceivedBytesThreshold = 1;

        }

        private void SenBut_Click(object sender, EventArgs e)
        {
            serialPort.Write(this.SenBox.Text);
            MessageBox.Show("数据发送成功", "系统提示");
        }

        private void RevBut_Click(object sender, EventArgs e)
        {
            MessageBox.Show("数据接收完毕", "系统提示");
        }

        private void serialPort_DataReceived(object sender, System.IO.Ports.SerialDataReceivedEventArgs e)
        {
            Thread.Sleep(500);
            byte[] readBuffer = new byte[serialPort.ReadBufferSize];
            serialPort.Read(readBuffer, 0, readBuffer.Length);
            this.Invoke(interfaceUpdateHandle, new string[] { Encoding.UTF8.GetString(readBuffer) });
        }
    }
}