Question

Is there a function in c# which returns date&time when given GMT values(-12 to -1 and 1 to 12)?

EDIT:

I have a Dropdownlistbox which contains all GMT values.. Now i want to display date&time of a selected GMT value….

Answer 1

GMT is Greenwich Mean Time, right? Or better known as UTC?

I think you’re referring to UTC offset.

In other words, given an offset from GMT, what is the time in that spot?

I think it is

DateTime.SpecifyKind(DateTime.UtcNow + new Timespan(offsetHours,0,0),
                     DateTimeKind.LocalTime);

except, that’s not really true, because the “kind” of that DateTime will be Local, meaning wherever the computer is right now. What you really want is a DateTimeKind with a particular timezone.

Addendum

Also see the TzTimeZone class that is included in the
PublicDomain project on Codeplex: http://www.codeplex.com/publicdomain.

The System.TimeZone as included in .NET 2.0 does not permit an
application to instantiate a TimeZone object given a shorthand name of
the timezone, or a UTC offset. Instead, the System.TimeZone class
“knows” about the local timezone but doesn’t do much else. This makes
it difficult to take an arbitrary time (say, 3:13pm, October 4th 2006,
in Los Angeles) and format it for display in an arbitrary other timezone
(say, Paris).

The TzTimeZone class provides a model for a number of different
timezones, including their offsets from UTC and the rules they apply for
daylight savings time.

With this new set of classes, it is possible to instantiate a timezone
from a well-known set of named instances. It is also easy to format a
time value w.r.t. any arbitrary (named) timezone. In particular, it is
easy to take a time like (3:13pm October 4th 2006, in Los Angeles) and
format it for display in Paris.