serialPort控件（串口通信）

记得打开奇偶校验

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 串口通信_控件_
{
public partial class Form1 : Form
{
public Form1()
{
InitializeComponent();
}

private void Form1_Load(object sender, EventArgs e)
{
//string[] ports = SerialPort.GetPortNames();

}


private void serialPort1_DataReceived(object sender, SerialDataReceivedEventArgs e)
{
a = send();
this.BeginInvoke(new System.Threading.ThreadStart(delegate()
{
textBox1.Text = a.ToString();
}));

}
StringBuilder a = new StringBuilder();
private StringBuilder send()
{
byte[] buf = new byte[serialPort1.BytesToRead];
serialPort1.Read(buf, 0, buf.Length);
a.Append(Encoding.ASCII.GetString(buf));
return a;
}

private void button2_Click(object sender, EventArgs e)
{
if (serialPort1.IsOpen == false)
this.serialPort1.Open();
string temp = textBox2.Text;
byte[] buf = new byte[this.serialPort1.BytesToRead];
buf = Encoding.ASCII.GetBytes(temp);
if (serialPort1.IsOpen)
{
serialPort1.Write(buf, 0, buf.Length);
}
}
}
}