Datetime to milliseconds in c#?

Question

I am trying to convert a sample java code to c#. This is the java code and I need some assistance in figuring out the proper way to get the equivalent code in c#. This is what I tried so far.

java code

TimeZone kenyaTimeZone = TimeZone.getTimeZone("Africa/Kenya");
Calendar calendar = Calendar.getInstance(kenyaTimeZone);
long timestamp = calendar.getTimeInMillis() / 1000;

C# code

TimeZoneInfo tzone = TimeZoneInfo.FindSystemTimeZoneById("Africa /Kenya");
DateTimeOffset dt = new DateTimeOffset(DateTime.UtcNow, tzone.BaseUtcOffset);

This is where I am stuck. Please help me out. I would like to get the result in milliseconds and I am unable to figure out the proper way to do it.

@bornfromanegg:= I would like to know if I am doing it the right way and how i can convert the DateTimeOffset object to milliseconds. — rose krempton, Nov 09 '17 at 13:28
Do you mean the number of milliseconds since the start of the day? — bornfromanegg, Nov 09 '17 at 13:29
@bornfromanegg:- I am not sure about that as I am trying to figure out that from the java code. — rose krempton, Nov 09 '17 at 13:30
Do you know that `calendar.getTimeInMillis()` returns the current time as UTC milliseconds from the epoch and therefore the TimeZone is a complete waste — , Nov 09 '17 at 13:32
See [Java System.currentTimeMillis() equivalent in C#](https://stackoverflow.com/questions/290227/java-system-currenttimemillis-equivalent-in-c-sharp) — , Nov 09 '17 at 13:35
A very similar question/answer here: https://stackoverflow.com/questions/5955883/datetimes-representation-in-milliseconds — bornfromanegg, Nov 09 '17 at 13:36

score 0 · Answer 1 · answered Nov 09 '17 at 13:38

0

To convert the difference between two datetimes to milliseconds:

double totalMs = (endDate - startDate).TotalMilliseconds;

answered Nov 09 '17 at 13:38

red9350

338
3
11

Guergolet · Answer 2 · 2017-11-09T16:17:17.990

Maybe, this short code could help you. I read that java function "calendar.getTimeInMillis()" returns the milliseconds since 1970-01-01 (Like Unix Timestamp).

    var dt = TimeZoneInfo.ConvertTime(DateTime.Now, TimeZoneInfo.FindSystemTimeZoneById("E. Africa Standard Time"));
    // Get C# time in milliseconds (since 1900-01-01)
    double milli = new TimeSpan(dt.Ticks).TotalMilliseconds;

    // Get Unix timestamp
    double unix = dt.Subtract(new DateTime(1970, 1, 1)).TotalMilliseconds;

    Console.WriteLine("Total Milliseconds: {0}  Unix: {1}", milli, unix);

score 0 · Answer 3 · answered Jul 01 '19 at 12:01

0

use this :

decimal miliseconds = myDateTime.ToUniversalTime().Subtract(new DateTime(1970, 1, 1, 0, 0, 0, DateTimeKind.Utc)).TotalMilliseconds;

myDateTime is a DateTime object

good luck :)

answered Jul 01 '19 at 12:01

Matin Pirasteh

39
4

Datetime to milliseconds in c#?

3 Answers3