由于工作需要,第一次接触串口编程.所以不得不在网上查阅各种编程实例.最后结合自己的理解与实践,最终有了如下代码.

using System; using System.Collections.Generic; using System.Linq; using System.Text; using System.Runtime.InteropServices; using System.Threading; using System.IO.Ports; namespace PacketsTest { class ComSR { private SerialPort serialPort; private bool status = false;//接受结束状态，true为成功接收到数据. private byte[] reciveData = null;//接受到的数据存储到这里. public bool Status { set { status = value; } get { return status; } } public byte[] RecivedData { get { return reciveData; } } public SerialPort _SerialPort { get { return serialPort; } } public ComSR(string portName,int baudRate,int dataBits,Parity parity,StopBits stopbits) { serialPort = new SerialPort(); serialPort.PortName = portName;//设置端口 serialPort.BaudRate = baudRate;//设置波特率 serialPort.DataBits = dataBits;//设置数据长度 serialPort.Parity = parity;//设置奇偶校验协议 serialPort.StopBits = stopbits;//停止位 serialPort.ReceivedBytesThreshold = 1;//这里是读事件触发条件,1代表一个字节 serialPort.DtrEnable = true;//启用数据终端就绪信号 serialPort.RtsEnable = true;//请求发送就绪信号 serialPort.DataReceived += new SerialDataReceivedEventHandler(Data_Recive);//绑定处理读事件的函数. } public void SendBuff(byte[] data) { try { serialPort.Write(data, 0, data.Length);//这里是写 } catch (Exception e) { if (serialPort != null && serialPort.IsOpen) { status = false; //这个status是我在上层类中判断端口读写状态的属性,可以去掉 serialPort.Close(); } } } void Data_Recive(object o, EventArgs e)//这个是读端口,事件处理函数 { try { Thread.Sleep(3); int length = serialPort.BytesToRead; reciveData = new byte[length]; serialPort.Read(reciveData, 0, length); while (serialPort.BytesToRead != 0)//由于数据长度读写不一,而且时间很难确定,所以在这里做了这样的处理 { Thread.Sleep(1); } if (serialPort.IsOpen) { status = true; //serialPort.Close();//这里不应该关闭,应当在更高层次的程序上关闭端口. } } catch (Exception ex) { if (serialPort != null &&　serialPort.IsOpen) { status = false; serialPort.Close(); } } } public void PortOpen() { if (!serialPort.IsOpen) { serialPort.Open(); } else { serialPort.Close(); serialPort.Open(); } } /// <summary> /// 关闭端口 /// </summary> public void PortClose() { if (serialPort != null && serialPort.IsOpen) { serialPort.Close(); } } } }