随便写个用SerialPort操作串口的简单例子

/*随便写个用SerialPort操作串口的简单例子（待修正及优化）*/

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

namespace WindowsFormsApplication1
{
public partial class Form1 : Form
{
SerialPort sp = new SerialPort("COM3");

delegate void AppendStringDelegate(string str);

public Form1()
{
InitializeComponent();
}

private void readData()
{
AppendStringDelegate appendStrMethod = new AppendStringDelegate(AppendString);

while (true)
{
if (sp.IsOpen)
{
int count = sp.BytesToRead;
byte[] bytes = new byte[count];
try
{
int DataLength = sp.Read(bytes, 0, bytes.Length);
if (DataLength > 0)
{
if (listBox1.InvokeRequired)
{
listBox1.Invoke(appendStrMethod, Encoding.UTF8.GetString(bytes));
}
}
Thread.Sleep(1000);
}
catch (Exception ex)
{
throw new Exception(ex.Message);
}
}
}
}

private void Form1_Load(object sender, EventArgs e)
{
Thread thread = new Thread(new ThreadStart(readData));
thread.IsBackground = true;
thread.Start();
}

private void btnSend_Click(object sender, EventArgs e)
{
if (!sp.IsOpen)
{
sp.Open();
}
sp.RtsEnable = true;
sp.Encoding = Encoding.GetEncoding("UTF-8");
sp.Write(this.textBox1.Text);
}

private void AppendString(string str)
{
listBox1.Items.Add(str);
}

private void Form1_FormClosing(object sender, FormClosingEventArgs e)
{
sp.Close();
Application.ExitThread();
Application.Exit();
}
}
}