CODEWITHSUNDEEP
c#datetime
Charanoglu
Charanoglu

Reputation: 1339

How to properly convert a DateTime to a specific TimeZone?

I'm trying to convert this date: Sunday 26 August 2018 18:30:00 to a GMT +2, so the result should be: Today, 26 Aug 2018, 20:30.

Now the following code works:

var unixTimeStampValue = Convert.ToInt64(1535308200);
var unixTimeStamp = unixTimeStampValue.Split("-")[0].Replace("t", "");
unixTimeStamp = Regex.Match(unixTimeStamp, @"\d+").Value;

DateTime dtDateTime = new DateTime(1970, 1, 1, 0, 0, 0, 0);
dtDateTime = dtDateTime.AddSeconds(Convert.ToInt64(unixTimeStamp));

TimeZoneInfo timeInfo = TimeZoneInfo.FindSystemTimeZoneById("Central Europe Standard Time");
var date = TimeZoneInfo.ConvertTimeFromUtc(dtDateTime, timeInfo);

but the problem is that if I run this on linux I'll get:

System.IO.FileNotFoundException: The time zone ID 'Central Europe Standard Time' was not found on the local computer --> System.IO.FileNotFoundException: Could not find file '/usr/share/zoneinfo/Central Europe Standard Time'.

The problem appear only on linux, how can I fix that? There is another way to get this conversion?

Upvotes: 1

Views: 280

Answers (1)

Jon Skeet
Jon Skeet

Reputation: 1500505

As requested, an example with Noda Time:

using System;
using NodaTime;

class Test
{
    static void Main()
    {
        Instant instant = Instant.FromUnixTimeSeconds(1535308200);
        DateTimeZone zone = DateTimeZoneProviders.Tzdb["Europe/Budapest"];
        ZonedDateTime zoned = instant.InZone(zone);
        Console.WriteLine(zoned);
    }
}

Output on my machine:

2018-08-26T20:30:00 Europe/Budapest (+02)

You can convert the ZonedDateTime back to a DateTime if you need to, but it's best to use Noda Time for as much of your date/time handling as you can, to get the full benefit.

Upvotes: 1

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