将UTC日期时间到另一个时区

问题描述:

我有一个UTC DateTime值从数据库中的记录来了。我也有用户指定的时区(的TimeZoneInfo的一个实例)。如何转换的UTC日期时间到用户的本地时区?另外,我怎么判断用户指定的时区目前观察DST?我使用.NET 3.5。

I have a UTC DateTime value coming from a database record. I also have a user-specified time zone (an instance of TimeZoneInfo). How do I convert that UTC DateTime to the user's local time zone? Also, how do I determine if the user-specified time zone is currently observing DST? I'm using .NET 3.5.

谢谢,
马克

有一个看的DateTimeOffset 结构:

// user-specified time zone
TimeZoneInfo southPole =
    TimeZoneInfo.FindSystemTimeZoneById("Antarctica/South Pole Standard Time");

// an UTC DateTime
DateTime utcTime = new DateTime(2007, 07, 12, 06, 32, 00, DateTimeKind.Utc);

// DateTime with offset
DateTimeOffset dateAndOffset =
    new DateTimeOffset(utcTime, southPole.GetUtcOffset(utcTime));

Console.WriteLine(dateAndOffset);

有关DST看到 TimeZoneInfo.IsDaylightSavingTime 方法。

bool isDst = southpole.IsDaylightSavingTime(DateTime.UtcNow);