CODEWITHSUNDEEP
c#.netnodatime
Axel Prieto
Axel Prieto

Reputation: 605

Get offset minutes from timezone (string) with NodaTime

What's the easiest way to get the minutes if I only have a string that represents the timezone? (for example "Europe/London")

So far I have:

public static int ConvertFromTimeZoneToMinutesOffset(string timeZone)
{
    DateTimeZone zone = DateTimeZoneProviders.Tzdb[timeZone];

    // Need magic code to get offset as minutes
}

But I'm not finding an easy approach to convert it to minutes.

NOTE: What I need is the offset in that specific moment in which the code is being executed. Between that timezone and UTC.

Upvotes: 12

Views: 4803

Answers (2)

Jon Skeet
Jon Skeet

Reputation: 1500805

You need DateTimeZone.GetUtcOffset(Instant):

public static int ConvertFromTimeZoneToMinutesOffset(string timeZone, IClock clock)
{
    DateTimeZone zone = DateTimeZoneProviders.Tzdb[timeZone];
    Offset offset = zone.GetUtcOffset(clock.Now);
    return offset.Milliseconds / NodaConstants.MillisecondsPerMinute;
}

You could leave off the IClock parameter and instead use SystemClock.Instance in the method, but that leads to code which is harder to test.

Upvotes: 26

Jim Snyder
Jim Snyder

Reputation: 99

Use the DatePart() function on minutes.

Upvotes: -2

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