C# 用API操作读写串口Word格式文档下载.docx
《C# 用API操作读写串口Word格式文档下载.docx》由会员分享，可在线阅读，更多相关《C# 用API操作读写串口Word格式文档下载.docx（14页珍藏版）》请在冰豆网上搜索。
this.m_ovRead.InternalHigh=0;
this.m_ovRead.Offset=0;
this.m_ovRead.OffsetHigh=0;
}
publicstringPortNum;
//COM1COM2COM3COM4
publicintBaudRate;
//1200,2400,4800,9600
publicbyteByteSize;
//8bits
publicbyteParity;
//0-4=no,odd,even,mark,space
publicbyteStopBits;
//0,1,2=1,1.5,2
publicintReadTimeout;
//10
//commportwin32filehandle
privateinthComm=-1;
publicboolOpened=false;
OVERLAPPEDm_ovWrite=newOVERLAPPED（）;
OVERLAPPEDm_ovRead=newOVERLAPPED（）;
//win32apiconstants
privateconstuintGENERIC_READ=0x80000000;
privateconstuintGENERIC_WRITE=0x40000000;
privateconstintOPEN_EXISTING=3;
privateconstintINVALID_HANDLE_VALUE=-1;
[StructLayout（LayoutKind.Sequential）]
/*
privatestructDCB貌似设置有错误位域没设置对
//takenfromcstructinplatformsdk
publicintDCBlength;
//sizeof（DCB）
//currentbaudrate
publicintfBinary;
//binarymode,noEOFcheck
publicintfParity;
//enableparitychecking
publicintfOutxCtsFlow;
//CTSoutputflowcontrol
publicintfOutxDsrFlow;
//DSRoutputflowcontrol
publicintfDtrControl;
//DTRflowcontroltype
publicintfDsrSensitivity;
//DSRsensitivity
publicintfTXContinueOnXoff;
//XOFFcontinuesTx
publicintfOutX;
//XON/XOFFoutflowcontrol
publicintfInX;
//XON/XOFFinflowcontrol
publicintfErrorChar;
//enableerrorreplacement
publicintfNull;
//enablenullstripping
publicintfRtsControl;
//RTSflowcontrol
publicintfAbortOnError;
//abortonerror
publicintfDummy2;
//reserved
publicushortwReserved;
//notcurrentlyused
publicushortXonLim;
//transmitXONthreshold
publicushortXoffLim;
//transmitXOFFthreshold
//numberofbits/byte,4-8
publiccharXonChar;
//TxandRxXONcharacter
publiccharXoffChar;
//TxandRxXOFFcharacter
publiccharErrorChar;
//errorreplacementcharacter
publiccharEofChar;
//endofinputcharacter
publiccharEvtChar;
//receivedeventcharacter
publicushortwReserved1;
//reserved;
donotuse
*/
privatestructDCB
publicintxData;
//x值一个32位
privatestructCOMMTIMEOUTS
publicintReadIntervalTimeout;
publicintReadTotalTimeoutMultiplier;
publicintReadTotalTimeoutConstant;
publicintWriteTotalTimeoutMultiplier;
publicintWriteTotalTimeoutConstant;
privatestructOVERLAPPED
publicintInternal;
publicintInternalHigh;
publicintOffset;
publicintOffsetHigh;
publicinthEvent;
[DllImport（"
kernel32.dll"
）]
privatestaticexternintCreateFile（
stringlpFileName,//filename
uintdwDesiredAccess,//accessmode
intdwShareMode,//sharemode
intlpSecurityAttributes,//SD
intdwCreationDisposition,//howtocreate
intdwFlagsAndAttributes,//fileattributes
inthTemplateFile//handletotemplatefile
）;
privatestaticexternboolGetCommTimeouts（
inthFile,//handletocommdevice
refCOMMTIMEOUTSlpCommTimeouts//time-outvalues
privatestaticexternboolGetCommState（
inthFile,//handletocommunicationsdevice
refDCBlpDCB//device-controlblock
privatestaticexternboolSetCommState（
privatestaticexternboolSetCommTimeouts（
privatestaticexternboolReadFile（
inthFile,//handletofile
byte[]lpBuffer,//databuffer
intnNumberOfBytesToRead,//numberofbytestoread
refintlpNumberOfBytesRead,//numberofbytesread
refOVERLAPPEDlpOverlapped//overlappedbuffer
privatestaticexternboolWriteFile（
intnNumberOfBytesToWrite,//numberofbytestowrite
refintlpNumberOfBytesWritten,//numberofbyteswritten
privatestaticexternboolCloseHandle（
inthObject//handletoobject
privatestaticexternintGetLastError（
privatestaticexternintWaitForSingleObject（
inthHandle,
intdwMilliseconds
privatestaticexternboolGetOverlappedResult（
inthFile,//handletofile,pipe,orcommdevice
refOVERLAPPEDlpOverlapped,//pointertooverlappedstructure
refintlpNumberOfBytesTransferred,//pointertoactualbytescount
boolbWait//waitflag
privatestaticexternboolPurgeComm（
inthFile,//handletocommunicationsresource
intdwFlags//actiontoperform
privatestaticexternboolSetupComm（
intdwInQueue,//sizeofinputbuffer
intdwOutQueue//sizeofoutputbuffer
privatestaticexternintCreateEvent（
intlpSECURITY_ATTRIBUTES,//传递个NULL就是0
//pointertosecurityattributes
boolbManualReset,//flagformanual-resetevent
boolbInitialState,//flagforinitialstate
intlpName//pointertoevent-objectname
publicvoidOpen（）
DCBdcbCommPort=newDCB（）;
COMMTIMEOUTSctoCommPort=newCOMMTIMEOUTS（）;
//OPENTHECOMMPORT.
intFILE_FLAG_OVERLAPPED=0x40000000;
hComm=CreateFile（PortNum,GENERIC_READ|GENERIC_WRITE,0,0,OPEN_EXISTING,FILE_FLAG_OVERLAPPED,0）;
//IFTHEPORTCANNOTBEOPENED,BAILOUT.
if（hComm==INVALID_HANDLE_VALUE）
throw（newApplicationException（this.PortNum+"
串口打开失败"
））;
//SETBAUDRATE,PARITY,WORDSIZE,ANDSTOPBITS.
//THEREAREOTHERWAYSOFDOINGSETTINGTHESEBUTTHISISTHEEASIEST.
//IFYOUWANTTOLATERADDCODEFOROTHERBAUDRATES,REMEMBER
//THATTHEARGUMENTFORBuildCommDCBMUSTBEAPOINTERTOASTRING.
//ALSONOTETHATBuildCommDCB（）DEFAULTSTONOHANDSHAKING.
dcbCommPort.DCBlength=Marshal.SizeOf（dcbCommPort）;
GetCommState（hComm,refdcbCommPort）;
dcbCommPort.BaudRate=BaudRate;
dcbCommPort.Parity=Parity;
dcbCommPort.ByteSize=ByteSize;
dcbCommPort.StopBits=StopBits;
dcbCommPort.wReserved1=0;
SetCommState（hComm,refdcbCommPort）;
boolret=SetupComm（hComm,200,200）;
//十分重要不然会写进去字节过多发不出去那么多
if（!
ret）
MessageBox.Show（"
设置缓冲区失败"
）;
//SETTHECOMMTIMEOUTS.
GetCommTimeouts（hComm,refctoCommPort）;
ctoCommPort.ReadIntervalTimeout=10*9600/this.BaudRate+100;
//9600:
110
ctoCommPort.ReadTotalTimeoutConstant=ReadTimeout;
ctoCommPort.ReadTotalTimeoutMultiplier=10*9600/this.BaudRate;
ctoCommPort.WriteTotalTimeoutMultiplier=0;
ctoCommPort.WriteTotalTimeoutConstant=2*9600/this.BaudRate;
SetCommTimeouts（hComm,refctoCommPort）;
Opened=true;
this.ClearInOut（）;
publicvoidClose（）
if（hComm!
=INVALID_HANDLE_VALUE）
CloseHandle（hComm）;
Opened=false;
CloseHandle（m_ovRead.hEvent）;
CloseHandle（m_ovWrite.hEvent）;
publicvoidClearInOut（）
if（this.hComm==INVALID_HANDLE_VALUE）
return;
intPURGE_TXABORT=0x0001;
//Killthepending/currentwritestothecommport.
intPURGE_RXABORT=0x0002;
//Killthepending/currentreadstothecommport.
intPURGE_TXCLEAR=0x0004;
//Killthetransmitqueueifthere.
intPURGE_RXCLEAR=0x0008;
//Killthetypeaheadbufferifthere.
PurgeComm（hComm,PURGE_TXABORT|PURGE_RXABORT|PURGE_TXCLEAR|PURGE_RXCLEAR）;
publicbyte[]Read（intNumBytes）
byte[]BufBytes;
byte[]OutBytes=null;
BufBytes=newbyte[NumBytes];
intERROR_IO_PENDING=997;
intBytesRead=0;
boolbOK=ReadFile（hComm,BufBytes,NumBytes,refBytesRead,refm_ovRead）;
if（bOK==true）
OutBytes=newbyte[BytesRead];
Array.Copy（BufBytes,OutBytes,BytesRead）;
else
升级会员 