参考之前的资料，写了一个自己常用的串口类，
字符串发送类型用了两种方式，char[] 和byte[] ；
数据接收也是采用两种 char[] 和byte[] 两种。
类代码贴出来：
public class SerialPortManager { private bool _recStaus = true;//接收状态字 private bool _comPortIsOpen; private void SetAfterClose()//成功关闭串口或串口丢失后的设置 { _comPortIsOpen = false;//串口状态设置为关闭状态 } private void SetComLose()//成功关闭串口或串口丢失后的设置 { SetAfterClose();//成功关闭串口或串口丢失后的设置 } public SerialPort CurrentSerialPort { get; set; } = new SerialPort(); public byte[] ReceivedDataPacket { get; set; } public bool OpenSerialPort(SerialPort serialPortPara) { CurrentSerialPort = serialPortPara; if (_comPortIsOpen == false) //ComPortIsOpen == false当前串口为关闭状态，按钮事件为打开串口 { try //尝试打开串口 { CurrentSerialPort.ReadTimeout = 8000; //串口读超时8秒 CurrentSerialPort.WriteTimeout = 8000; //串口写超时8秒，在1ms自动发送数据时拔掉串口，写超时5秒后，会自动停止发送，如果无超时设定，这时程序假死 CurrentSerialPort.ReadBufferSize = 1024; //数据读缓存 CurrentSerialPort.WriteBufferSize = 1024; //数据写缓存 CurrentSerialPort.DataReceived += ComReceive; //串口接收中断 CurrentSerialPort.Open(); _comPortIsOpen = true; //串口打开状态字改为true } catch (Exception exception) //如果串口被其他占用，则无法打开 { _comPortIsOpen = false; ReceiveCompleted = false; throw new Exception("unable open serial port" + exception.Message); } return true; } return true; } public char[] ReceivedDataPacketChar { get; set; } public bool ReceiveCompleted { get; set; } private void ComReceive(object sender, SerialDataReceivedEventArgs e) { ReceiveCompleted = false; if (_recStaus) //如果已经开启接收 { try { Thread.Sleep(50); ReceivedDataPacket = new byte[CurrentSerialPort.BytesToRead]; ReceivedDataPacketChar = new char[CurrentSerialPort.BytesToRead]; // change to char datas if (ByteMode) { CurrentSerialPort.Read(ReceivedDataPacket, 0, ReceivedDataPacket.Length); } else { CurrentSerialPort.Read(ReceivedDataPacketChar, 0, CurrentSerialPort.BytesToRead); } ReceiveCompleted = true; } catch (Exception) { if (CurrentSerialPort.IsOpen == false) //如果ComPort.IsOpen == false，说明串口已丢失 { SetComLose(); //串口丢失后相关设置 } else { throw new Exception("unable to receive data"); } } } else //暂停接收 { CurrentSerialPort.DiscardInBuffer(); //清接收缓存 } } public bool SendDataPacket(string dataPacket) { char[] dataPacketChar = dataPacket.ToCharArray(); return SendDataPacket(dataPacketChar); } public bool SendDataPacket(byte[] dataPackeg) { try { ByteMode = true; CurrentSerialPort.Write(dataPackeg, 0, dataPackeg.Length); } catch (Exception exception) { Console.WriteLine(exception.Message); return false; } return true; } public bool CloseSerialPort() { try//尝试关闭串口 { CurrentSerialPort.DiscardOutBuffer();//清发送缓存 CurrentSerialPort.DiscardInBuffer();//清接收缓存 //WaitClose = true;//激活正在关闭状态字，用于在串口接收方法的invoke里判断是否正在关闭串口 CurrentSerialPort.Close();//关闭串口 // WaitClose = false;//关闭正在关闭状态字，用于在串口接收方法的invoke里判断是否正在关闭串口 SetAfterClose();//成功关闭串口或串口丢失后的设置 _comPortIsOpen = false; } catch//如果在未关闭串口前，串口就已丢失，这时关闭串口会出现异常 { if (CurrentSerialPort.IsOpen == false)//判断当前串口状态，如果ComPort.IsOpen==false，说明串口已丢失 { SetComLose(); } else//未知原因，无法关闭串口 { throw new Exception("unable close serial port"); } } return true; } public bool ByteMode { get; set; } public bool SendDataPacket(char[] senddata) { try { ByteMode = false; CurrentSerialPort.Write(senddata, 0, senddata.Length); } catch (Exception exception) { Console.WriteLine(exception.Message); return false; } return true; } } 调用方法：char[]
private SerialPortManager _serialPortManager = new SerialPortManager();char[] bytes ={(char)0xAA,(char)0xFF,(char)0x55, (char)0xff, (char)0x06, (char)0x20, (char)0xAA,(char)0XEE,(char)0x55,(char)0xEE}; _serialPortManager.SendDataPacket(bytes); byte[]
byte[] byteOrdor = new byte[] { 0xAA,0XFF,0X55, 0XFF,0X06,0X20,0XAA,0XEE,0X55,0XEE }; _serialPortManager.SendDataPacket(byteOrdor); 数据接收数组对应使用
public byte[] ReceivedDataPacket { get; set; }public char[] ReceivedDataPacketChar { get; set; } 实际可用。