C#如何进行串口操作？

用MsComm或CommBase
英文水平不差的直接看这个：
http://msdn.microsoft.com/msdnmag/issues/02/10/NETSerialComm/default.aspx
自认为英文水平差就用MsComm(即以前的VC或VB带有的那个MsComm32.OCX)

MsComm32.OCX需要注册，网上有关与手工注册的方法，但我用了一下不行注册不了。
CommBase 我上http://msdn.microsoft.com/msdnmag/issues/02/10/NETSerialComm/default.aspx看了一下，也试着用了，可以打开端口，但写端口失败。

第一：通过MSCOMM控件这是最简单的，最方便的方法。可功能上很难做到控制自如，同时这个控件并不是系统本身所带，所以还得注册，不在本文讨论范围。可以访问http://www.devhood.com/tutorials/tutorial_details.aspx?tutorial_id=320 ，一个国外网友的写的教程，作者很热心，我曾有发邮件给他，很快就回复了。　　第二：微软在.NET新推出了一个串口控件，基于.NET的P/Invoke调用方法实现，详细的大家可以访问微软网站http://msdn.microsoft.com/msdnmag/issues/02/10/NETSerialComm/default.aspx，方便得到更多资料。　　第三：就是用第三方控件啦，可一般都要付费的，不太合实际，不作考虑　　第四：自己用API写串口通信，这样难度高点，但对于我们来说，可以方便实现自己想要的各种功能

using System;
using System.Runtime.InteropServices; /// <summary>
/// (C)2003-2005 C2217 Studio 保留所有权利
///
/// 文件名称: IbmsSerialPort.cs
/// 文件ID:
/// 文件说明:
/// 封装动态链接库IbmsSerialPort.dll的功能，提供在.NET环境中
/// 串口异步接收和发送数据的功能。
///
/// 当前版本: 1.0
///
/// 作者: 邓杨均
/// 创建日期: 2005-2-2
/// 最后修改日期: 2005-2-2
///
/// 历史修改记录:
///
/// </summary>
namespace Ibms.Tool.IO
{ /// <summary>
/// 当串口接收到数据时，会产生一个事件。
/// SPRecvDataArgs就是该事件的参数，参数中的RecvData包含接收到的数据。
/// 使用方法：
/// </summary>
public class SPRecvDataArgs:EventArgs
{
/// <summary>
/// 接收到的数据组成的字节数组
/// </summary>
private byte[] recvData; /// <summary>
/// 构造函数,需要一个包含数据的byte[]作为初始化参数来实例化 SPRecvDataArgs
/// </summary>
/// <param name="recvData">接收到的数据</param>
public SPRecvDataArgs(byte[] recvData)
{
if( recvData == null)
{
throw(new ArgumentNullException());
} this.recvData = recvData;
} /// <summary>
/// 返回接收到的数据内容
/// </summary>
public byte[] RecvData
{
get
{
return recvData;
}
}
}
/// <summary>
/// 封装动态链接库IbmsSerialPort.dll的功能，提供在.NET环境中异步
/// 串口接收和发送功能。特别实现的是异步通过信号自动接收数据的模式。
/// </summary>
public class IbmsSerialPort:IDisposable
{ #region 平台调用声明代码 /// <summary>
/// 声明IbmsSerialPort.dll的Ibms_OpenPort函数
/// </summary>
/// <param name="nPort">串口号</param>
/// <param name="nRate">波特率</param>
/// <returns></returns>
[DllImport("IbmsSerialPort.dll")]
public static extern IntPtr Ibms_OpenPort(int nPort, int nRate); /// <summary>
/// 声明IbmsSerialPort.dll的Ibms_Close函数
/// </summary>
[DllImport("IbmsSerialPort.dll")]
public static extern void Ibms_Close( IntPtr port); /// <summary>
/// 声明IbmsSerialPort.dll的Ibms_SendData函数
/// </summary>
/// <param name="data"></param>
/// <param name="nDataSize"></param>
/// <returns></returns>
[DllImport("IbmsSerialPort.dll")]
public static extern bool Ibms_SendData( IntPtr port, byte[] data,int nDataSize); /// <summary>
/// 声明IbmsSerialPort.dll的Ibms_SetFuncHandle函数
/// </summary>
/// <param name="handDataFunc"></param>
[DllImport("IbmsSerialPort.dll")]
public static extern void Ibms_SetFuncHandle( IntPtr port, HandleFunc handDataFunc); #endregion #region 定义字段 /// <summary>
/// 定义数据处理委托，作为API的函数指针传入动态链接库
/// </summary>
public delegate void HandleFunc(IntPtr pData, int nDataSize); /// <summary>
/// 定义数据接收事件的原型
/// </summary>
public delegate void RecvData(object sender,SPRecvDataArgs e); /// <summary>
/// 定义数据接收事件
/// </summary>
public event RecvData OnRecvData; /// <summary>
/// 串口处理接收数据的委托
/// </summary>
private HandleFunc _handleDataFunc; /// <summary>
/// 串口的编号,从1开始的整数,最大255
/// </summary>
private int port; /// <summary>
/// 串口所支持的波特率,必须是标准波特率之一
/// </summary>
private StanderdRate rate; /// <summary>
/// 串口当前的打开状态
/// </summary>
private bool openStatus=false; /// <summary>
/// 串口句柄
/// </summary>
private IntPtr portHandle; #region 定义标准的串口波特率 /// <summary>
/// 标准的波特率
/// </summary>
public enum StanderdRate
{
R50=50,
R75=75,
R110=110,
R150=150,
R300=300,
R600=600,
R1200=1200,
R2400=2400,
R4800=4800,
R9600=9600,
R19200=19200,
R38400=38400,
R57600=57600,
R76800=76800,
R115200=115200
}; #endregion #endregion #region 定义方法 /// <summary>
/// 构造函数
/// </summary>
public IbmsSerialPort()
{
portHandle = (IntPtr)0; _handleDataFunc = new HandleFunc(OnDllRecvData);
} /// <summary>
/// 打开串口
/// </summary>
/// <param name="nPort">串口号</param>
/// <param name="nRate">波特率</param>
/// /// <exception cref="ApplicationException">抛出应用程序异常,包换错误描述</exception>
public void Open(int nPort, StanderdRate nRate)
{ if(nPort > 255 || nPort < 0)
{
throw(new ArgumentOutOfRangeException());
} port = nPort;
rate = nRate; portHandle = Ibms_OpenPort( port, (int)rate ); if( (IntPtr)0 == portHandle )
{
throw( new ApplicationException("打开串口失败"));
} //注册函数指针
Ibms_SetFuncHandle( portHandle, _handleDataFunc ); openStatus = true; }
/// <summary>
/// 关闭串口
/// </summary>
public void Close()
{
if( openStatus )
{
Ibms_Close( portHandle); } openStatus = false; }
/// <summary>
/// 发送数据
/// </summary>
/// <param name="sendData">数据内容</param>
/// <exception cref="ApplicationException">抛出应用程序异常,包换错误描述</exception>
public void SendData( byte[] data )
{
if( !openStatus )
{
throw( new ApplicationException("串口没有打开,发送数据失败") );
} if( !Ibms_SendData( portHandle, data, data.Length ) )
{
throw( new ApplicationException("串口发送数据失败") );
}
} /// <summary>
/// 处理接收到的串口数据
/// </summary>
/// <param name="pData">串口数据接收缓冲区首地址</param>
/// <param name="nDataSize">数据大小,一般数据大小不超过2K</param>
unsafe protected void OnDllRecvData(IntPtr pUnhandleData, int nDataSize)
{
int dataSize= nDataSize ; byte * pData =(byte *) pUnhandleData; byte[] data = new byte[dataSize]; //复制数据到byte数组
for(int i=0; i<dataSize; i++)
{
data[i]= pData[i];
} //激发事件
OnRecvData( this, new SPRecvDataArgs(data) ); }
#endregion #region 定义属性 /// <summary>
/// 返回当前的串口号
/// </summary>
public int Port
{
get
{
return port;
}
} /// <summary>
/// 返回当前串口的波特率
/// </summary>
public StanderdRate Rate
{
get
{
return rate;
}
} /// <summary>
/// 返回当前串口的状态
/// </summary>
public bool OpenStatus
{
get
{
return openStatus;
}
}
#endregion
#region 非托管资源的及时释放 /// <summary>
/// 因为包含了非托管的资源(占用系统串口),必须实现IDisposable接口
/// 在使用完该类的时候,必须记得调用Dispose(),回收系统资源
/// <example>
///
/// 方法1
/// {
/// SerialPort port =new SerialPort();
/// ...
/// //在try-catch-finaly的finaly中释放资源
///
/// port.Dispose();
/// }
///
/// 方法2
/// using( SerialPort port = new SerialPort())
/// {
/// ...
/// }
/// 变量超出作用域时会自动调用其Dispose()方法
///
/// </example>
/// </summary> ~IbmsSerialPort()
{
Dispose( false );
} protected virtual void Dispose( bool disposing )
{
if( disposing )
{
//清理托管的对象
} //清理非托管的资源
Close();
}
#region IDisposable 成员 public void Dispose()
{
// TODO: 添加 SerialPort.Dispose 实现
Dispose( true ); GC.SuppressFinalize(this);
} #endregion
#endregion } }

去网上找JustinIO.cs的代码既可

代码太长，贴不下来，不过我感觉这个可能是.net下做得最好的，下载地址为：www.codeworks.it/net/index.htm也可以找我

我找到了JustinIO.cs的代码，但还是可以打开端口却写端口失败！
以下是JustinIO.cs的代码，与大家共享。内容太长所以分开贴出。
第一部分：using System;
using System.Runtime.InteropServices;
namespace JustinIO
{
public class CommPort
{
public int PortNum =1;
public int BaudRate = 9600;
public byte ByteSize = 8;
public byte Parity=1; // 0-4=no,odd,even,,space
public byte StopBits=1; // 0,1,2 = 1, 1.5, 2
public int ReadTimeout=2000;
//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)]
private struct DCB
{
//taken from c struct in platform sdk
public int DCBlength;           // sizeof(DCB)
public int BaudRate;            // current baud rate
public int fBinary;          // binary mode, no EOF check
public int fParity;          // enable parity checking
public int fOutxCtsFlow;      // CTS output flow control
public int fOutxDsrFlow;      // DSR output flow control
public int fDtrControl;       // DTR flow control type
public int fDsrSensitivity;   // DSR sensitivity
public int fTXContinueOnXoff; // XOFF continues Tx
public int fOutX;          // XON/XOFF out flow control
public int fInX;           // XON/XOFF in flow control
public int fErrorChar;     // enable error replacement
public int fNull;          // enable null stripping
public int fRtsControl;     // RTS flow control
public int fAbortOnError;   // abort on error
public int fDummy2;        // reserved
public ushort wReserved;          // not currently used
public ushort XonLim;             // transmit XON threshold
public ushort XoffLim;            // transmit XOFF threshold
public byte ByteSize;           // number of bits/byte, 4-8
public byte Parity;             // 0-4=no,odd,even,,space
public byte StopBits;           // 0,1,2 = 1, 1.5, 2
public char XonChar;            // Tx and Rx XON character
public char XoffChar;           // Tx and Rx XOFF character
public char ErrorChar;          // error replacement character
public char EofChar;            // end of input character
public char EvtChar;            // received event character
public ushort wReserved1;         // 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;
}

第二部分：
[DllImport("kernel32.dll")]
private static extern int CreateFile(
string lpFileName,                         // file name
uint dwDesiredAccess,                      // access mode
int dwShareMode,                          // share mode
int lpSecurityAttributes, // SD
int dwCreationDisposition,                // how to create
int dwFlagsAndAttributes,                 // file attributes
int hTemplateFile                        // handle to template file
); [DllImport("kernel32.dll")]
private static extern bool GetCommState(
int hFile,  // handle to communications device
ref DCB lpDCB    // device-control block
);   [DllImport("kernel32.dll")]
private static extern bool BuildCommDCB(
string lpDef,  // device-control string
ref DCB lpDCB     // device-control block
); [DllImport("kernel32.dll")]
private static extern bool SetCommState(
int hFile,  // handle to communications device
ref DCB lpDCB    // device-control block
); [DllImport("kernel32.dll")]
private static extern bool GetCommTimeouts(
int hFile,                  // handle to comm device
ref COMMTIMEOUTS lpCommTimeouts  // time-out values
);   [DllImport("kernel32.dll")]
private static extern bool SetCommTimeouts(
int hFile,                  // handle to comm device
ref COMMTIMEOUTS lpCommTimeouts  // time-out values
); [DllImport("kernel32.dll")]
private static extern bool ReadFile(
int hFile,                // handle to file
byte[] lpBuffer,             // data buffer
int nNumberOfBytesToRead,  // number of bytes to read
ref int lpNumberOfBytesRead, // number of bytes read
ref OVERLAPPED lpOverlapped    // overlapped buffer
); [DllImport("kernel32.dll")]
private static extern bool WriteFile(
int hFile,                    // handle to file
byte[] lpBuffer,                // data buffer
int nNumberOfBytesToWrite,     // number of bytes to write
ref int lpNumberOfBytesWritten,  // number of bytes written
ref OVERLAPPED lpOverlapped        // overlapped buffer
); [DllImport("kernel32.dll")]
private static extern bool CloseHandle(
int hObject   // handle to object
); public void Open()
{
DCB dcbCommPort = new DCB();
COMMTIMEOUTS ctoCommPort = new COMMTIMEOUTS();
// OPEN THE COMM PORT.
hComm = CreateFile("LPT" + PortNum ,GENERIC_READ | GENERIC_WRITE,0, 0,OPEN_EXISTING,0,0);
// IF THE PORT CANNOT BE OPENED, BAIL OUT.
if(hComm == INVALID_HANDLE_VALUE)
{
throw(new ApplicationException("LPT Port Can Not Be Opened"));
}
// SET THE COMM TIMEOUTS.
GetCommTimeouts(hComm,ref ctoCommPort);
ctoCommPort.ReadTotalTimeoutConstant = ReadTimeout;
ctoCommPort.ReadTotalTimeoutMultiplier = 0;
ctoCommPort.WriteTotalTimeoutMultiplier = 0;
ctoCommPort.WriteTotalTimeoutConstant = 0;
SetCommTimeouts(hComm,ref ctoCommPort);
// SET BAUD RATE, PARITY, WORD SIZE, AND STOP BITS.
// THERE ARE OTHER WAYS OF DOING SETTING THESE BUT THIS IS THE EASIEST.
// IF YOU WANT TO LATER ADD CODE FOR OTHER BAUD RATES, REMEMBER
// THAT THE ARGUMENT FOR BuildCommDCB MUST BE A POINTER TO A STRING.
// ALSO NOTE THAT BuildCommDCB() DEFAULTS TO NO HANDSHAKING.
dcbCommPort.DCBlength = Marshal.SizeOf(dcbCommPort);
GetCommState(hComm, ref dcbCommPort);
dcbCommPort.BaudRate=BaudRate;
dcbCommPort.Parity=Parity;
dcbCommPort.ByteSize=ByteSize;
dcbCommPort.StopBits=StopBits;
SetCommState(hComm, ref dcbCommPort);
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("Comm Port Not Open"));
}
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("Comm Port Not Open"));
}
}
} class HexCon
{
//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] = Byte.Parse("0x" + ByteStrings[i]);
}
return ByteOut;
}
}
}

请问：ekin7913046(终结者)
在哪里可以下到"IbmsSerialPort.dll".
这个DLL应该不是提供在.NET环境中的，我的机器装有VS.net 2003我做了个整机搜索也找不到这个文件。

用微软的类吧（NETSerialComm），继承它就可以了。多简单！！也是用API写的也有原代码，你不需要研究明白他，只需要继承他就可以用了！！！性能还不错。安全性非常高！！

调试易

C#如何进行串口操作？

解决方案 »