CString、CTime和COleDateTime转换

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转载自：http://blog.csdn.net/sniper08/archive/2010/04/15/5488640.aspx

COleDateTime、CTime--->CString
这个方法很简单，用Format格式化一个字符串就可以了，详见MSDN

CString--->COleDateTime:

方法1：COleDateTime::ParseDateTime()

CString strDate = _T("1987-06-21");

COleDateTime oleDate;

oleDate.ParseDateTime(strDate, VAR_DATEVALUEONLY);

方法2：COleVariant

CString strDate = _T("1987-06-21");

COleVariant varTime(strDate);

varTime.ChangeType(VT_DATE);

COleDateTime oleDate(varTime);

//COleDateTime oleDate;

//oleDate=varTime;

COleDateTime--->CTime:

方法1：用COleDateTime::GetAsSystemTime(SYSTEMTIME& sysTime)

COleDateTime oleDate(1987, 6, 21, 0, 0, 0);

SYSTEMTIME sysTime;

oleDate.GetAsSystemTime(sysTime);

CTime tm(sysTime);

方法2：用VariantTimeToSystemTime函数
COleDateTime--->SYSTEMTIME--->CTime

COleDateTime oleDate(1987, 6, 21, 0, 0, 0);

SYSTEMTIME sysTime;

VariantTimeToSystemTime(oleDate, &sysTime);

CTime tm(sysTime);

CTime--->COleDateTime:

方法1：用CTime::GetTime()得到time_t

CTime time(1987, 6, 21, 0, 0, 0);

time_t tm = time.GetTime();

COleDateTime oleTime(tm);

方法2：用COleDateTime::GetAsSystemTime(SYSTEMTIME& sysTime)

CTime time(1987, 6, 21, 0, 0, 0);

SYSTEMTIME sysTime;

time.GetAsSystemTime(sysTime);

COleDateTime oleTime(sysTime);

//COleDateTime oleTime;

//oleTime=sysTime;

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