C#实现串口通讯

一、引用dll

using System.IO.Ports;

二、串口连接

SerialPort serialClient;
StopBits stopBits = StopBits.One;
Parity parity = Parity.None;


//打开串口
public void TurnOn()
{
	if (serialClient != null)
	{
		serialClient.Close();
	}
	serialClient = new SerialPort("COM1", 115200, Parity.None, 8, StopBits.One);
	serialClient.DataReceived += SerialClient_DataReceived;
	serialClient.Open();
}


//关闭串口
public void TurnOff()
{
	try
	{
		serialClient.Close();
	}
	catch (Exception)
	{
	}
} 

三、接收数据

/// <summary>
/// 串口接收数据事件
/// </summary>
/// <param name="sender"></param>
/// <param name="e"></param>
private void SerialClient_DataReceived(object sender, SerialDataReceivedEventArgs e)
{
	try
	{
		byte[] buffer;
		int num = serialClient.BytesToRead; // 接收到的byte数
		if (num == 0) { return; }
		buffer = new byte[num]; 
		//解析数据
		string readString = System.Text.Encoding.Default.GetString(buffer, 0, buffer.Length);
	}
	catch (Exception)
	{


	}
}

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