日志_测试代码_Qt532

1、

int LogFile(QString &_str)
{
    QDateTime datetime = QDateTime::currentDateTime();//获取系统现在的时间
    QString strTime = datetime.toString("hh:mm:ss.zzz"); //设置显示格式

#ifdef BUILD_EXE
    QString strExeDll = "[EXE]";
#else
    QString strExeDll = "[DLL]";
#endif
    _str = strTime+" : "+ strExeDll +" "+_str+ "
";
    // ZC: 本exe所在路径
    QString strPath;
    QDir dir;
    strPath = dir.currentPath();


    QString strDate = datetime.toString("yyyyMMdd"); //设置显示格式

    // ZC: log文件的 路径 及 文件名
    QString strLogFileName = strPath+"/"+strDate+".log";

    HANDLE hLogFile = CreateFileA(strLogFileName.toLatin1(), GENERIC_WRITE, FILE_SHARE_READ, 0, OPEN_ALWAYS/*CREATE_NEW*/, 0, 0);
    if (hLogFile == INVALID_HANDLE_VALUE)
        return GetLastError();

    //BOOL B = SetEndOfFile(hLogFile);
    if ( INVALID_SET_FILE_POINTER == SetFilePointer(hLogFile, 0, 0, FILE_END) )
    {
        int iErr = GetLastError();
        CloseHandle(hLogFile);
        return iErr;
    }
    DWORD dwWritten = 0;
    BOOL B = WriteFile(hLogFile, _str.toLatin1(), _str.length(), &dwWritten, NULL);
    if (! B)
    {
        int iErr = GetLastError();
        CloseHandle(hLogFile);
        return iErr;
    }
    CloseHandle(hLogFile);
    return 0;
}

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