I Want Convert My Datetime to TimeStamp C#?

Question

I want to convert my datetime in C# (e.g. 2009-06-22 16:35:16.000) to something like this 1196550000000. I tried the following method but it fails.

public static double GetTimestamp(DateTime value)
{
    long ticks = DateTime.UtcNow.Ticks - DateTime.Parse(value.ToString()).Ticks;
    ticks /= 10000000; //Convert windows ticks to seconds
    Int64 timestamp = ticks;
    return timestamp;
}

`DateTime.Parse(value.ToString()).Ticks` equals `value.Ticks` in case of successful parse — fubo, Jan 19 '17 at 10:35
Possible duplicate of [How to convert datetime to timestamp using C#/.NET (ignoring current timezone)](http://stackoverflow.com/questions/9814060/how-to-convert-datetime-to-timestamp-using-c-net-ignoring-current-timezone) — OmG, Jan 19 '17 at 10:48

score 0 · Accepted Answer · edited Jan 19 '17 at 12:16

0

First of all, you don't need to ToString() and Reparse the DateTime. If you want just the Date you can use the DateTime.Date property.

Then, this should be simple enough (using DateTime.Now as a reference point):

public static double GetTimestamp(DateTime value)
{
    return new TimeSpan(DateTime.UtcNow.Ticks - value.Ticks).TotalSeconds;
}

In case the parsing you did in your question did refer to extracting the date from the DateTime, you can use the following:

public static double GetTimestamp(DateTime value)
{
     return new TimeSpan(DateTime.UtcNow.Ticks - value.Date.Ticks).TotalSeconds;
}

EDIT : You appear to want some kind of posix time conversion which can be achieved like this :

private static readonly DateTime POSIXRoot = new DateTime(1970, 1, 1, 0, 0, 0, 0);
public static double GetPosixSeconds(DateTime value)
{
    return (value - POSIXRoot).TotalSeconds;
}

public static DateTime GetDateTime(double posixSeconds) {
    return POSIXRoot.AddSeconds(posixSeconds);
}

edited Jan 19 '17 at 12:16

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answered Jan 19 '17 at 10:35

Thomas Bienkowski

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i used this method to make sure of covering – Hesham Ali Jan 19 '17 at 10:42
public static DateTime RetunValuedate(double Date) { var dt = new DateTime(1970, 1, 1, 0, 0, 0, 0).AddSeconds(Math.Round(Date / 1000d)).ToLocalTime(); DateTime h = dt; return h; }>` – Hesham Ali Jan 19 '17 at 10:56
i use some method to make sure the correct number but i don't know how i can highlight it ? – Hesham Ali Jan 19 '17 at 11:15
So you are trying to get some kind of POSIX time from it ? You just have to replace the DateTime.UtcNow.Ticks by the posix root, see my edit. – Thomas Bienkowski Jan 19 '17 at 11:19
i have chart using this number if you use this (1196463600000) on my method it will return (12/1/2007) it is the only one method return the chart Date – Hesham Ali Jan 19 '17 at 11:48
it is long number your method use int32 only – Hesham Ali Jan 19 '17 at 11:50

I Want Convert My Datetime to TimeStamp C#?

1 Answers1