What is the most precised DateTime I can use in NET 3.5?

Posted on 2013-01-21
Last Modified: 2013-01-22
What is actally precision of NET 3.5 DateTime variable ? It is 16 miliseconds? Do I have a option to replace it with some other type? Maybe with DateTimeOffset – is it has better precision?

 My situation is that I have a WinForm C# 2008 Net 3.5 project which work with Start Date and then add between 100 and 500 time durations in miliseconds /video files duration/ . I understand that best is to keep the start date in DateTime varibale and to get current date   with code
            dtCurr = dtStart.AddMilliseconds(lItemRealDurMS);

This almost will solve the problem, as I’ll get inaccuracy with only 1 calculcation, not with all 100-500 calculations. Is that correct? Anyway, I’m interesting of the most precise DateTime I can use in NET 3.5
Question by:dvplayltd
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Accepted Solution

Dhaest earned 500 total points
ID: 38800246
LVL 81

Expert Comment

by:David Johnson, CD, MVP
ID: 38800939
With video files why are you not counting the frames and dividing by the fps? You can't get any more precise with a video than an individual frame

Author Comment

ID: 38801684
TO  Dhaest

Well, I find this articles before you send me. Anyway, DateTimeOffset is more precise than DateTime , or it is the same?

To ve3ofa
Well, for my project - workign with a playlist with 24 hours duration few seconds in a day are acceptable solution. Anyway, more accurance is not possible for ordinary PC - most PC timer move between 1 and 5 seconds for a day .
And I already have other system which works with miliseconds, not with frame count.
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Expert Comment

by:David Johnson, CD, MVP
ID: 38801798
Video measurement is still more precise..  if the file is 2300 frames @ 23.97 fps the play length is 95.954 seconds depending upon the # of video's, involved plus the queuing speed a 24 hour playlist may be +/- a few minutes.

100 and 500 time durations in miliseconds /video files duration (this is what confused me)

Author Comment

ID: 38801981
To ve3ofa

100 and 500 time durations in miliseconds  - i mean that I loop via all file's duration and show the current time every file start .

Author Closing Comment

ID: 38805748

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