短信收发类无错版JustinIO.cs

using System;
 using System.Runtime.InteropServices;
namespace JustinIO {
  class CommPort {
  public string PortNum;
   public int BaudRate;
   public byte ByteSize;
   public byte Parity; // 0-4=no,odd,even,mark,space
   public byte StopBits; // 0,1,2 = 1, 1.5, 2
   public int ReadTimeout;
 
   //comm port win32 file handle
   private int hComm = -1;
 
   public bool Opened = false;
 
   //win32 api constants
     private const uint GENERIC_READ = 0x80000000;
     private const uint GENERIC_WRITE = 0x40000000;
     private const int OPEN_EXISTING = 3;  
     private const int INVALID_HANDLE_VALUE = -1;
 
   [StructLayout(LayoutKind.Sequential)]
   public struct DCB {
    //taken from c struct in platform sdk
    public int DCBlength;           // sizeof(DCB)
    public int BaudRate;            // 指定当前波特率 current baud rate
    // these are the c struct bit fields, bit twiddle flag to set
    public int fBinary;          // 指定是否允许二进制模式,在windows95中必须主TRUE binary mode, no EOF check
    public int fParity;          // 指定是否允许奇偶校验 enable parity checking
    public int fOutxCtsFlow;      // 指定CTS是否用于检测发送控制，当为TRUE是CTS为OFF，发送将被挂起。 CTS output flow control
    public int fOutxDsrFlow;      // 指定CTS是否用于检测发送控制 DSR output flow control
    public int fDtrControl;       // DTR_CONTROL_DISABLE值将DTR置为OFF, DTR_CONTROL_ENABLE值将DTR置为ON, DTR_CONTROL_HANDSHAKE允许DTR"握手" DTR flow control type
    public int fDsrSensitivity;   // 当该值为TRUE时DSR为OFF时接收的字节被忽略 DSR sensitivity
    public int fTXContinueOnXoff; // 指定当接收缓冲区已满,并且驱动程序已经发送出XoffChar字符时发送是否停止。TRUE时，在接收缓冲区接收到缓冲区已满的字节XoffLim且驱动程序已经发送出XoffChar字符中止接收字节之后，发送继续进行。　FALSE时，在接收缓冲区接收到代表缓冲区已空的字节XonChar且驱动程序已经发送出恢复发送的XonChar之后，发送继续进行。XOFF continues Tx
    public int fOutX;          // TRUE时，接收到XoffChar之后便停止发送接收到XonChar之后将重新开始 XON/XOFF out flow control
    public int fInX;           // TRUE时，接收缓冲区接收到代表缓冲区满的XoffLim之后，XoffChar发送出去接收缓冲区接收到代表缓冲区空的XonLim之后，XonChar发送出去 XON/XOFF in flow control
    public int fErrorChar;     // 该值为TRUE且fParity为TRUE时，用ErrorChar 成员指定的字符代替奇偶校验错误的接收字符 enable error replacement
    public int fNull;          // eTRUE时，接收时去掉空（0值）字节 enable null stripping
    public int fRtsControl;     // RTS flow control
            /*RTS_CONTROL_DISABLE时,RTS置为OFF
    　        RTS_CONTROL_ENABLE时, RTS置为ON
           RTS_CONTROL_HANDSHAKE时,
           当接收缓冲区小于半满时RTS为ON
    　        当接收缓冲区超过四分之三满时RTS为OFF
           RTS_CONTROL_TOGGLE时,
           当接收缓冲区仍有剩余字节时RTS为ON ,否则缺省为OFF*/
   public int fAbortOnError;   // TRUE时,有错误发生时中止读和写操作 abort on error
    public int fDummy2;        // 未使用 reserved
 
    public uint flags;
    public ushort wReserved;          // 未使用,必须为0 not currently used
    public ushort XonLim;             // 指定在XON字符发送这前接收缓冲区中可允许的最小字节数 transmit XON threshold
    public ushort XoffLim;            // 指定在XOFF字符发送这前接收缓冲区中可允许的最小字节数 transmit XOFF threshold
    public byte ByteSize;           // 指定端口当前使用的数据位 number of bits/byte, 4-8
    public byte Parity;             // 指定端口当前使用的奇偶校验方法,可能为:EVENPARITY,MARKPARITY,NOPARITY,ODDPARITY  0-4=no,odd,even,mark,space
    public byte StopBits;           // 指定端口当前使用的停止位数,可能为:ONESTOPBIT,ONE5STOPBITS,TWOSTOPBITS  0,1,2 = 1, 1.5, 2
    public char XonChar;            // 指定用于发送和接收字符XON的值 Tx and Rx XON character
    public char XoffChar;           // 指定用于发送和接收字符XOFF值 Tx and Rx XOFF character
    public char ErrorChar;          // 本字符用来代替接收到的奇偶校验发生错误时的值 error replacement character
    public char EofChar;            // 当没有使用二进制模式时,本字符可用来指示数据的结束 end of input character
    public char EvtChar;            // 当接收到此字符时,会产生一个事件 received event character
    public ushort wReserved1;         // 未使用 reserved; do not use
   }
  [StructLayout(LayoutKind.Sequential)]
   private struct COMMTIMEOUTS { 
     public int ReadIntervalTimeout;
     public int ReadTotalTimeoutMultiplier;
     public int ReadTotalTimeoutConstant;
     public int WriteTotalTimeoutMultiplier;
     public int WriteTotalTimeoutConstant;
   }  
  [StructLayout(LayoutKind.Sequential)] 
   private struct OVERLAPPED {
       public int  Internal;
       public int  InternalHigh;
       public int  Offset;
       public int  OffsetHigh;
       public int hEvent;
   } 
 
   [DllImport("kernel32.dll")]
   private static extern int CreateFile(
     string lpFileName,                         // 要打开的串口名称
     uint dwDesiredAccess,                      // 指定串口的访问方式，一般设置为可读可写方式
     int dwShareMode,                          // 指定串口的共享模式，串口不能共享，所以设置为0
     int lpSecurityAttributes, // 设置串口的安全属性，WIN9X下不支持，应设为NULL
     int dwCreationDisposition,                // 对于串口通信，创建方式只能为OPEN_EXISTING
     int dwFlagsAndAttributes,                 // 指定串口属性与标志，设置为FILE_FLAG_OVERLAPPED(重叠I/O操作)，指定串口以异步方式通信
     int hTemplateFile                        // 对于串口通信必须设置为NULL
   );
   [DllImport("kernel32.dll")]
   private static extern bool GetCommState(
     int hFile,  //通信设备句柄
     ref DCB lpDCB    // 设备控制块DCB
   ); 
   [DllImport("kernel32.dll")]
   private static extern bool BuildCommDCB(
     string lpDef,  // 设备控制字符串
     ref DCB lpDCB     // 设备控制块
   );
   [DllImport("kernel32.dll")]
   private static extern bool SetCommState(
     int hFile,  // 通信设备句柄
     ref DCB lpDCB    // 设备控制块
   );
   [DllImport("kernel32.dll")]
   private static extern bool GetCommTimeouts(
     int hFile,                  // 通信设备句柄 handle to comm device
     ref COMMTIMEOUTS lpCommTimeouts  // 超时时间 time-out values
   ); 
   [DllImport("kernel32.dll")] 
   private static extern bool SetCommTimeouts(
     int hFile,                  // 通信设备句柄 handle to comm device
     ref COMMTIMEOUTS lpCommTimeouts  // 超时时间 time-out values
   );
   [DllImport("kernel32.dll")]
   private static extern bool ReadFile(
     int hFile,                // 通信设备句柄 handle to file
     byte[] lpBuffer,             // 数据缓冲区 data buffer
     int nNumberOfBytesToRead,  // 多少字节等待读取 number of bytes to read
     ref int lpNumberOfBytesRead, // 读取多少字节 number of bytes read
     ref OVERLAPPED lpOverlapped    // 溢出缓冲区 overlapped buffer
   );
   [DllImport("kernel32.dll")] 
   private static extern bool WriteFile(
     int hFile,                    // 通信设备句柄 handle to file
     byte[] lpBuffer,                // 数据缓冲区 data buffer
     int nNumberOfBytesToWrite,     // 多少字节等待写入 number of bytes to write
     ref int lpNumberOfBytesWritten,  // 已经写入多少字节 number of bytes written
     ref OVERLAPPED lpOverlapped        // 溢出缓冲区 overlapped buffer
   );
   [DllImport("kernel32.dll")]
   private static extern bool CloseHandle(
     int hObject   // handle to object
   );
   [DllImport("kernel32.dll")]
   private static extern uint GetLastError();
 
   public void Open()
   {
 
             DCB dcbCommPort = new DCB();
             COMMTIMEOUTS ctoCommPort = new COMMTIMEOUTS(); 
 
     // 打开串口 OPEN THE COMM PORT.
             hComm = CreateFile(PortNum ,GENERIC_READ | GENERIC_WRITE,0, 0,OPEN_EXISTING,0,0);
     // 如果串口没有打开，就打开 IF THE PORT CANNOT BE OPENED, BAIL OUT.
    if(hComm == INVALID_HANDLE_VALUE)
    {
       throw(new ApplicationException("非法操作，不能打开串口！"));
    }
 
    // 设置通信超时时间 SET THE COMM TIMEOUTS.
    GetCommTimeouts(hComm,ref ctoCommPort);
    ctoCommPort.ReadTotalTimeoutConstant = ReadTimeout;
    ctoCommPort.ReadTotalTimeoutMultiplier = 0;
    ctoCommPort.WriteTotalTimeoutMultiplier = 0;
    ctoCommPort.WriteTotalTimeoutConstant = 0; 
    SetCommTimeouts(hComm,ref ctoCommPort);
 
    // 设置串口 SET BAUD RATE, PARITY, WORD SIZE, AND STOP BITS.
    GetCommState(hComm, ref dcbCommPort);
    dcbCommPort.BaudRate=BaudRate;
    dcbCommPort.flags=0;
    //dcb.fBinary=1;
    dcbCommPort.flags|=1;
    if (Parity>0)
    {
       //dcb.fParity=1
         dcbCommPort.flags|=2;
    }
    dcbCommPort.Parity=Parity;
    dcbCommPort.ByteSize=ByteSize;
    dcbCommPort.StopBits=StopBits;
             //if (!BuildCommDCB("9600,n,8,1  ", ref  dcbCommPort))
             //{
             //    throw (new ApplicationException("非法操作，不能打开串口！  "));
             //} 
            if (!SetCommState(hComm, ref dcbCommPort))
    {
     //uint ErrorNum=GetLastError();
        throw(new ApplicationException("非法操作，不能打开串口！"));
    }
     //unremark to see if setting took correctly
     //DCB dcbCommPort2 = new DCB();
     //GetCommState(hComm, ref dcbCommPort2);
    Opened = true;
   }
 
   public void Close() {
    if (hComm!=INVALID_HANDLE_VALUE) {
     CloseHandle(hComm);
    }
   }
 
   public byte[] Read(int NumBytes) {
    byte[] BufBytes;
    byte[] OutBytes;
    BufBytes = new byte[NumBytes];
    if (hComm!=INVALID_HANDLE_VALUE) {
     OVERLAPPED ovlCommPort = new OVERLAPPED();
     int BytesRead=0;
     ReadFile(hComm,BufBytes,NumBytes,ref BytesRead,ref ovlCommPort);
     OutBytes = new byte[BytesRead];
     Array.Copy(BufBytes,OutBytes,BytesRead);
    }
    else {
     throw(new ApplicationException("串口未打开！"));
    }
    return OutBytes;
   }
 
   public void Write(byte[] WriteBytes) {
    if (hComm!=INVALID_HANDLE_VALUE) {
     OVERLAPPED ovlCommPort = new OVERLAPPED();
     int BytesWritten = 0;
     WriteFile(hComm,WriteBytes,WriteBytes.Length,ref BytesWritten,ref ovlCommPort);
    }
    else {
     throw(new ApplicationException("串口未打开！"));
    }  
   }
  }
 class HexCon {
  // 把十六进制字符串转换成字节型和把字节型转换成十六进制字符串 converter hex string to byte and byte to hex string
   public static string ByteToString(byte[] InBytes) {
    string StringOut="";
    foreach (byte InByte in InBytes) {
     StringOut=StringOut + String.Format("{0:X2} ",InByte);
    }
    return StringOut;
   }
   public static byte[] StringToByte(string InString) {
    string[] ByteStrings;
    ByteStrings = InString.Split(" ".ToCharArray());
    byte[] ByteOut;
    ByteOut = new byte[ByteStrings.Length-1];
    for (int i = 0;i==ByteStrings.Length-1;i++) {
     ByteOut[i] = Convert.ToByte(("0x" + ByteStrings[i]));
    }
    return ByteOut;
   }
  }
 }