CBuilder中使用管道技术实例

废话不多说，大家来看代码

bool __fastcall TForm1::RunCmd(AnsiString cmd,TStringList *stringlist)

{

TMemoryStream *memstream=new TMemoryStream();

AnsiString rn="\r\n";

PROCESS_INFORMATION proc;

STARTUPINFO start;

SECURITY_ATTRIBUTES sa;

long ret;

unsigned long lngBytesread;

HANDLE hReadPipe,hWritePipe;

char *strBuff=(char *)malloc(256);

if(strBuff==NULL)

{

return false;

}

sa.nLength = sizeof(SECURITY_ATTRIBUTES);

sa.bInheritHandle=true;

sa.lpSecurityDescriptor=NULL;

ret=CreatePipe(&hReadPipe,&hWritePipe,&sa,0);

if(ret==0)

{

//创建管道失败

return false;

}

memset(&start,0x00,sizeof(STARTUPINFO));

start.cb=sizeof(STARTUPINFO);

start.dwFlags=STARTF_USESTDHANDLES | STARTF_USESHOWWINDOW;

start.hStdOutput=hWritePipe;

start.hStdError=hWritePipe;

bool retc=CreateProcess(NULL,cmd.c_str(),NULL,NULL,true, 0, 0, NULL, &start, &proc);

if(!retc)

{

return false;

}

CloseHandle(hWritePipe);

unsigned long len;

memstream->Position=0;

while(true)

{

memset(strBuff,0x00,256);

GetFileSize(hReadPipe,&len);

ret = ReadFile(hReadPipe, strBuff, 256, &lngBytesread,NULL);

if(ret==0)

{

break;

}

else

{

memstream->Write(strBuff,lngBytesread);

}

}

CloseHandle(proc.hProcess);

CloseHandle(proc.hThread);

CloseHandle(hReadPipe);

memstream->Position=0;

free(strBuff);

stringlist->LoadFromStream(memstream);

memstream->Clear();

delete memstream;

return true;

}

以上为一个使用管道获取命令行模式的程序的运行结果的函数。

使用代码

TStringList *StrList=new TStringList;

AnsiString strcmd;

RunCmd(strcmd,StrList);

结果保留再StrList中。