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串口进行操作的类，其中包括写和读操作，类可设置串口参数、设置接收函数、打开串口资源、关闭串口资源,操作完成后,一定要关闭串口、接收串口数据事件、接收数据出错事件、获取当前全部串口、把字节型转换成十六进制字符串等功能。这个串口类已经过了调试，可以使用：
using System; using System.Collections.Generic; using System.Text; using System.IO.Ports; using System.Globalization; namespace SerialClass { public class SerialClass { SerialPort _serialPort = null; //定义委托 public delegate void SerialPortDataReceiveEventArgs(object sender, SerialDataReceivedEventArgs e, byte[] bits); //定义接收数据事件 public event SerialPortDataReceiveEventArgs DataReceived; //定义接收错误事件 //public event SerialErrorReceivedEventHandler Error; //接收事件是否有效 false表示有效 public bool ReceiveEventFlag = false; #region 获取串口名 private string protName; public string PortName { get { return _serialPort.PortName; } set { _serialPort.PortName = value; protName = value; } } #endregion #region 获取比特率 private int baudRate; public int BaudRate { get { return _serialPort.BaudRate; } set { _serialPort.BaudRate = value; baudRate = value; } } #endregion #region 默认构造函数 /// <summary> /// 默认构造函数，操作COM1，速度为9600，没有奇偶校验，8位字节，停止位为1 "COM1", 9600, Parity.None, 8, StopBits.One /// </summary> public SerialClass() { _serialPort = new SerialPort(); } #endregion #region 构造函数 /// <summary> /// 构造函数, /// </summary> /// <param name="comPortName"></param> public SerialClass(string comPortName) { _serialPort = new SerialPort(comPortName); _serialPort.BaudRate = 9600; _serialPort.Parity = Parity.Even; _serialPort.DataBits = 8; _serialPort.StopBits = StopBits.One; _serialPort.Handshake = Handshake.None; _serialPort.RtsEnable = true; _serialPort.ReadTimeout = 2000; setSerialPort(); } #endregion #region 构造函数,可以自定义串口的初始化参数 /// <summary> /// 构造函数,可以自定义串口的初始化参数 /// </summary> /// <param name="comPortName">需要操作的COM口名称</param> /// <param name="baudRate">COM的速度</param> /// <param name="parity">奇偶校验位</param> /// <param name="dataBits">数据长度</param> /// <param name="stopBits">停止位</param> public SerialClass(string comPortName, int baudRate, Parity parity, int dataBits, StopBits stopBits) { _serialPort = new SerialPort(comPortName, baudRate, parity, dataBits, stopBits); _serialPort.RtsEnable = true; //自动请求 _serialPort.ReadTimeout = 3000;//超时 setSerialPort(); } #endregion #region 析构函数 /// <summary> /// 析构函数，关闭串口 /// </summary> ~SerialClass() { if (_serialPort.IsOpen) _serialPort.Close(); } #endregion #region 设置串口参数 /// <summary> /// 设置串口参数 /// </summary> /// <param name="comPortName">需要操作的COM口名称</param> /// <param name="baudRate">COM的速度</param> /// <param name="dataBits">数据长度</param> /// <param name="stopBits">停止位</param> public void setSerialPort(string comPortName, int baudRate, int dataBits, int stopBits ) { if (_serialPort.IsOpen) _serialPort.Close(); _serialPort.PortName = comPortName; _serialPort.BaudRate = baudRate; _serialPort.Parity = Parity.None; _serialPort.DataBits = dataBits; _serialPort.StopBits = (StopBits)stopBits; _serialPort.Handshake = Handshake.None; _serialPort.RtsEnable = false; _serialPort.ReadTimeout = 3000; _serialPort.NewLine = "/r/n"; setSerialPort(); } #endregion #region 设置接收函数 /// <summary> /// 设置串口资源,还需重载多个设置串口的函数 /// </summary> void setSerialPort() { if (_serialPort != null) { //设置触发DataReceived事件的字节数为1 _serialPort.ReceivedBytesThreshold = 1; //接收到一个字节时，也会触发DataReceived事件 _serialPort.DataReceived += new SerialDataReceivedEventHandler(_serialPort_DataReceived); //接收数据出错,触发事件 _serialPort.ErrorReceived += new SerialErrorReceivedEventHandler(_serialPort_ErrorReceived); //打开串口 //openPort(); } } #endregion #region 打开串口资源 /// <summary> /// 打开串口资源 /// <returns>返回bool类型</returns> /// </summary> public bool openPort() { bool ok = false; //如果串口是打开的，先关闭 if (_serialPort.IsOpen) _serialPort.Close(); try { //打开串口 _serialPort.Open(); ok = true; } catch (Exception Ex) { throw Ex; } return ok; } #endregion #region 关闭串口 /// <summary> /// 关闭串口资源,操作完成后,一定要关闭串口 /// </summary> public void closePort() { //如果串口处于打开状态,则关闭 if (_serialPort.IsOpen) _serialPort.Close(); } #endregion #region 接收串口数据事件 /// <summary> /// 接收串口数据事件 /// </summary> /// <param name="sender"></param> /// <param name="e"></param> void _serialPort_DataReceived(object sender, SerialDataReceivedEventArgs e) { //禁止接收事件时直接退出 if (ReceiveEventFlag) { return; } try { System.Threading.Thread.Sleep(20); byte[] _data = new byte[_serialPort.BytesToRead]; _serialPort.Read(_data, 0, _data.Length); if (_data.Length == 0) { return; } if (DataReceived != null) { DataReceived(sender, e, _data); } //_serialPort.DiscardInBuffer(); //清空接收缓冲区 } catch (Exception ex) { throw ex; } } #endregion #region 接收数据出错事件 /// <summary> /// 接收数据出错事件 /// </summary> /// <param name="sender"></param> /// <param name="e"></param> void _serialPort_ErrorReceived(object sender, SerialErrorReceivedEventArgs e) { } #endregion #region 发送数据string类型 public void SendData(string data) { //发送数据 //禁止接收事件时直接退出 if (ReceiveEventFlag) { return; } if (_serialPort.IsOpen) { _serialPort.Write(data); } } #endregion #region 发送数据byte类型 /// <summary> /// 数据发送 /// </summary> /// <param name="data">要发送的数据字节</param> public void SendData(byte[] data, int offset, int count) { //禁止接收事件时直接退出 if (ReceiveEventFlag) { return; } try { if (_serialPort.IsOpen) { //_serialPort.DiscardInBuffer();//清空接收缓冲区 _serialPort.Write(data, offset, count); } } catch (Exception ex) { throw ex; } } #endregion #region 发送命令 /// <summary> /// 发送命令 /// </summary> /// <param name="SendData">发送数据</param> /// <param name="ReceiveData">接收数据</param> /// <param name="Overtime">超时时间</param> /// <returns></returns> public int SendCommand(byte[] SendData, ref byte[] ReceiveData, int Overtime) {
if (_serialPort.IsOpen) { try { ReceiveEventFlag = true; //关闭接收事件 _serialPort.DiscardInBuffer(); //清空接收缓冲区 _serialPort.Write(SendData, 0, SendData.Length); int num = 0, ret = 0; System.Threading.Thread.Sleep(10); ReceiveEventFlag = false; //打开事件 while (num++ < Overtime) { if (_serialPort.BytesToRead >= ReceiveData.Length) break; System.Threading.Thread.Sleep(10); }
if (_serialPort.BytesToRead >= ReceiveData.Length) { ret = _serialPort.Read(ReceiveData, 0, ReceiveData.Length); } else { ret = _serialPort.Read(ReceiveData, 0, _serialPort.BytesToRead); } ReceiveEventFlag = false; //打开事件 return ret; } catch (Exception ex) { ReceiveEventFlag = false; throw ex; } } return -1; } #endregion #region 获取串口 /// <summary> /// 获取所有已连接短信猫设备的串口 /// </summary> /// <returns></returns> public string[] serialsIsConnected() { List<string> lists = new List<string>(); string[] seriallist = getSerials(); foreach (string s in seriallist) { } return lists.ToArray(); } #endregion #region 获取当前全部串口资源 /// <summary> /// 获得当前电脑上的所有串口资源 /// </summary> /// <returns></returns> public string[] getSerials() { return SerialPort.GetPortNames(); } #endregion #region 字节型转换16 /// <summary> /// 把字节型转换成十六进制字符串 /// </summary> /// <param name="InBytes"></param> /// <returns></returns> public static string ByteToString(byte[] InBytes) { string StringOut = ""; foreach (byte InByte in InBytes) { StringOut = StringOut + String.Format("{0:X2} ", InByte); } return StringOut; } #endregion #region 十六进制字符串转字节型 /// <summary> /// 把十六进制字符串转换成字节型(方法1) /// </summary> /// <param name="InString"></param> /// <returns></returns> public static byte[] StringToByte(string InString) { string[] ByteStrings; ByteStrings = InString.Split(" ".ToCharArray()); byte[] ByteOut; ByteOut = new byte[ByteStrings.Length]; for (int i = 0; i <= ByteStrings.Length-1 ; i++) { //ByteOut[i] = System.Text.Encoding.ASCII.GetBytes(ByteStrings[i]); ByteOut[i] = Byte.Parse(ByteStrings[i], System.Globalization.NumberStyles.HexNumber); //ByteOut[i] =Convert.ToByte("0x" + ByteStrings[i]); } return ByteOut; } #endregion #region 十六进制字符串转字节型 /// <summary> /// 字符串转16进制字节数组(方法2) /// </summary> /// <param name="hexString"></param> /// <returns></returns> public static byte[] strToToHexByte(string hexString) { hexString = hexString.Replace(" ", ""); if ((hexString.Length % 2) != 0) hexString += " "; byte[] returnBytes = new byte[hexString.Length / 2]; for (int i = 0; i < returnBytes.Length; i++) returnBytes[i] = Convert.ToByte(hexString.Substring(i * 2, 2), 16); return returnBytes; } #endregion #region 字节型转十六进制字符串 /// <summary> /// 字节数组转16进制字符串 /// </summary> /// <param name="bytes"></param> /// <returns></returns> public static string byteToHexStr(byte[] bytes) { string returnStr = ""; if (bytes != null) { for (int i = 0; i < bytes.Length; i++) { returnStr += bytes[i].ToString("X2"); } } return returnStr; } #endregion } }
====================================================================================== 调用方法： static SerialClass sc = new SerialClass(); static void Main(string[] Args) { sc.DataReceived += new SerialClass.SerialPortDataReceiveEventArgs(sc_DataReceived); sc.writeData("at"); Console.ReadLine(); sc.closePort(); } static void sc_DataReceived(object sender, SerialDataReceivedEventArgs e, byte[] bits) { Console.WriteLine(Encoding.Default.GetString(bits)); }
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