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c#datetimetimezone
Charlie
Charlie

Reputation: 4895

I want to initialize DateTime in EST and then convert to Universal TIme

I want to initialize DateTime in Eastern Standard Time and then convert to universal time.

I have One DateTime (CurrentDT) whose TimeZone is not set, but it is in EST. it is parsedExact from following sting

"ddd, d MMM yyyy H:mm:ss"

I have written following code to solve the problem.

  TimeZoneInfo currentTimeZone=null;
  currentTimeZone = TimeZoneInfo.FindSystemTimeZoneById("Eastern Standard Time");      
  CurrentDT=TimeZoneInfo.ConvertTime(CurrentDT, currentTimeZone);
  CurrentDT = CurrentDT.ToUniversalTime();

The Problem is that it looks like i am doing wrong. I am converting DateTime,which is in local time zone to Eastern Standerd Time and then to universal standard Time. I don't know how can i initialize TimeZone of CurrentDt initially. Kindly help me understand Thankyou.

Upvotes: 4

Views: 1830

Answers (2)

Mark Shevchenko
Mark Shevchenko

Reputation: 8207

In some cases you could use (relatively) new type DateTimeOffset, like here:

var est = TimeZoneInfo.FindSystemTimeZoneById("Eastern Standard Time");
var offset = est.GetUtcOffset();
var dataTimeOffset = new DateTimeOffset(dateTimeWithoutOffset, offset);
var result = dateTimeOffset.UtcDateTime;

Since you should work in different time zones, DateTimeOffset can make your code more clear.

Upvotes: 1

Matteo Umili
Matteo Umili

Reputation: 4017

If I remember well, DateTime doesn't preserve info about TimeZone, but if you know that a certain DateTime is in a specific TimeZone you can get the UTC from it doing something like this:

var UtcDateTime = TimeZoneInfo.ConvertTimeToUtc(CurrentDt, TimeZoneInfo.FindSystemTimeZoneById("Eastern Standard Time")); // 1st param is the date to convert and the second is its TimeZone

Upvotes: 2

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