用虚拟串口

 //创建串口控件1

 System.IO.Ports.SerialPort serialPort1 = new System.IO.Ports.SerialPort(); 

// 配置串口1 // 关联串口接收事件 

serialPort1.DataReceived += new System.IO.Ports.SerialDataReceivedEventHandler(serialPort_DataReceived); 

//创建串口控件2

 System.IO.Ports.SerialPort serialPort2 = new System.IO.Ports.SerialPort();

 // 配置串口2 // 关联串口接收事件 

serialPort2.DataReceived += new System.IO.Ports.SerialDataReceivedEventHandler(serialPort_DataReceived); 

private void serialPort1_DataReceived(object sender, System.IO.Ports.SerialDataReceivedEventArgs e)

 {

 switch (((System.IO.Ports.SerialPort)sender).PortName)

 { 

case "COM1": break; case "COM2": break; 

}

 }