winform串口控件serialPort1的使用

serialPort1 控件使用的关键点主要有三：

1、配置串口号
2、配置数据接收事件
3、打开串口

关键代码如下：

 1 private void Form1_Load(object sender, EventArgs e)
 2 {
 3     serialPort1.PortName = "COM1";         
 4     serialPort1.DataReceived += SerialPort1_DataReceived;
 5     serialPort1.Open();
 6 }
 7   
 8 private void SerialPort1_DataReceived(object sender, System.IO.Ports.SerialDataReceivedEventArgs e)
 9 {
10     try
11     {
12         int len = serialPort1.BytesToRead;
13         Byte[] buf = new byte[len];
14         int length = serialPort1.Read(buf, 0, len);
15         string result = System.Text.Encoding.ASCII.GetString(buf);
16         UpdateTextBox(result);
17     }
18     catch (Exception ex)
19     {
20         UpdateTextBox(ex.Message);
21     }
22   
23 }