Convert From Datetime To Unix Time

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I got function which is converting UNIX time to DaTime which is working great anyhow now i need function to convert from DateTime to UNIX timestamp but something is wrong with this because when i am passing DateTime somehow the last 3 digits are not shown for instance i have this timestamp:

C#

1300124700345

which is equal to:

C#

14.03.2011 5:45 PM

When i pass that to below function i am retreiving:

C#

1300124700

3 last digits dissaperd somehow always. Could you help here?

C#

static readonly DateTime UnixEpoch =
       new DateTime(1970, 1, 1, 0, 0, 0, 0, DateTimeKind.Utc);

public static long ToUnixTime(DateTime date)
{
    return Convert.ToInt64((date - UnixEpoch).TotalSeconds);
}

Posted 31-Aug-14 23:31pm

carlito_brigante

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Gihan Liyanage · Answer 1 · 2014-08-31T23:44:00

Solution 1

http://en.code-bude.net/2013/09/22/how-to-convert-csharp-datetime-ticks-into-unix-timestamp/[^]

Posted 31-Aug-14 23:44pm

Gihan Liyanage

Comments

carlito_brigante 1-Sep-14 5:51am

already tried same result - the 3 last digits was cutted of.

E.F. Nijboer · Answer 2 · 2014-08-31T23:45:00

Solution 2

You are only using seconds. Try to add it as millisecornds like this:

C#

public static DateTime? ConvertUnixTimeStamp(string unixTimeStamp)
{
    return new DateTime(1970, 1, 1, 0, 0, 0).AddMilliseconds(Convert.ToDouble(unixTimeStamp));
}

Good luck!

Posted 31-Aug-14 23:45pm

E.F. Nijboer

v2

Comments

carlito_brigante 1-Sep-14 5:51am

your version is from unix time to datetime but i need from datetime to unix...

E.F. Nijboer 1-Sep-14 9:33am

Ah yes, sorry. Try change your code in ToUnixTime to this:

return Convert.ToInt64((date - UnixEpoch).TotalMilliseconds);