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Question:

CkDateTime GetAsFileTime Precision

Jul 06 '16 at 09:07

CkDateTime DateTime;

FILETIME ftDateTime;

LARGE_INTEGER liDateTime,liSystemTime;

DateTime.SetFromCurrentSystemTime();

DateTime.GetAsFileTime(false,ftDateTime);

liDateTime.HighPart = ftDateTime.dwHighDateTime;

liDateTime.LowPart = ftDateTime.dwLowDateTime;

GetSystemTimeAsFileTime((LPFILETIME)&liSystemTime);

sample values obtained :

liSystemTime {131119968964705422} _LARGE_INTEGER

liDateTime {131119968960000000} _LARGE_INTEGER

Lost in precision ie. missing 470xxxx...

(GetAsDateTimeTicks, I believe 100nanosecs ticks are also missing)

Is this correct ?

Fya.

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Answer

Yes, this is correct. The CkDateTime class is meant to be a cross-platform, cross-language class for date/time representations. It is meant to provide a means for accessing date/time information and converting to/from many different formats.

It is not intended to be a tool for precision timing.