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Thread: DateTime weird

  1. #1
    Join Date
    Oct 1999

    Question DateTime weird

    Trying to estimate when a test will end
    DateTime EndTime = new DateTime(DateTime.Now.Ticks + NTests * 20000000);
    This gives me an end time lower than DateTime.Now !?!? Thought it was caused by long overflow, but no result is lower than 9,223,372,036,854,775,807. Any idea what might be wrong here ?

  2. #2

    Re: DateTime weird

    Why will you need Ticks? Its nanoseconds from 1970. Why will you add to that? You can simply take the current time and if you know Ntests and how much time each test takes, then that can be added to current time.

  3. #3

    Re: DateTime weird

    Actually a single tick is 100 nano secs based on MSDN and ist from the start of the century not 1970.

  4. #4
    Join Date
    Feb 2011
    United States

    Re: DateTime weird

    How are you determining that it is lower than DateTime.Now (and which "now" do you mean?)
    Best Regards,

    All advice is offered in good faith only. You are ultimately responsible for effects of your programs and the integrity of the machines they run on.

  5. #5
    Join Date
    Jan 2006
    Fox Lake, IL

    Re: DateTime weird

    Explain what you are trying to calculate... Not at all clear?

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  6. #6
    Join Date
    Jan 2010

    Re: DateTime weird

    Any chance you're testing along the lines of: DateTime.Now < EndTime?
    Because, that "Now" is a new "Now", and not the original "Now".
    If so, you need to store the result of DateTime.Now the first time you call it, and check against that.

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