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can't milliseconds to datetime in console app

Posted on 2014-02-11
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Last Modified: 2014-02-11
I simply loop thru the following and try to increment my date by 1 ms. This functionality is in a dll that gets instantiated in my main app. It never increments. Any ideas?

dim m_datEntryDate as datetime=now

m_datEntryDate = m_datEntryDate.AddMilliseconds(1)
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Question by:glenn_r
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Ken Butters earned 600 total points
ID: 39851698
I tried this... it does increment the date/time... but I'm guessing that you are not formatting the date in order to be able to see the milliseconds.

With the following code:
Module Module1

    Sub Main()
        Dim m_datEntryDate As DateTime = Now
        Dim dateFormat As String = "MM/dd/yyyy hh:mm:ss.fffffff"

        Console.WriteLine("Original date: {0} ({1:N0} ticks)", m_datEntryDate.ToString(dateFormat), m_datEntryDate.Ticks)
        Console.WriteLine()

        m_datEntryDate = m_datEntryDate.AddMilliseconds(1)

        Console.WriteLine("New date: {0} ({1:N0} ticks)", m_datEntryDate.ToString(dateFormat), m_datEntryDate.Ticks)
        Console.WriteLine()

    End Sub

End Module

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I got the following output:

Original date: 02/11/2014 04:17:34.1060154 (635,277,322,541,060,154 ticks)

New date: 02/11/2014 04:17:34.1070154 (635,277,322,541,070,154 ticks)

Note that the number of ticks increased by 10,000.  (1 ms = 10,000 ticks)
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Author Comment

by:glenn_r
ID: 39851776
I was displaying the ms
I solved the problem but don't know why
might have something to do with the datetime object being immutable
as mentioned my calling app instantiates a dll containing this functionality
originally had the logic coupled in a for loop with allot of other code
it didn't work in that context
i created an object level variable and added a function that incremented the date and it worked
thanks for the backup
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