转换使用C＃一时间指定时区？ [英] Convert a time to specified time zone using C#?

问题描述

我工作在C＃与.net 3.5的应用程序。我已经在用户的时区值存储在数据库这种格式的（ - 05：00,1），其中 -5.00 表示EST时区的价值和<强> 1 表示该时区如下夏令（如果不是0一夏令时区）。

I'm working on an application in C# with .Net 3.5. I have time zone value of the User is stored in DB with this format (-05:00,1), where -5.00 represents EST time zone value and the 1 indicates that this time zone follows daylight saving (if 0 not a daylight saving zone).

现在我想任何日期时间值转换成考虑夏令值这个时区值。

Now I want to convert any date time value into this timezone value considering the daylight saving value.

任何帮助表示赞赏。谢谢

Any help is appreciated. Thanks

推荐答案

刚刚偏移以及是否是夏令时是不是真的足以说明一个时区：可以有同一标准偏移和DST偏移几个时区，但在不同时间DST转换。

Having just an offset and whether or not it's in daylight saving time isn't really enough to indicate a time zone: there can be several time zones with the same standard offset and DST offset, but which have DST transitions at different times.

这是数据已经在数据库中，或者是你还设计它？理想情况下，你应该存储时区ID - 那些 的TimeZoneInfo 与作品都是Windows的ID，这是不理想的国际海事组织（我更喜欢IANA /奥尔森的ID，该行业的其他趋向一起工作），但至少它确实代表了真正的时区。

Is this data already in the database, or are you still designing it? Ideally you should store a time zone ID - the ones TimeZoneInfo works with are Windows IDs, which isn't ideal IMO (I prefer the IANA/Olson IDs that the rest of the industry tends to work with) but at least it does represent a real time zone.

一旦你得到了一个的TimeZoneInfo 键，你要转换，<一个瞬间HREF =htt​​p://msdn.microsoft.com/en-us/library/system.timezoneinfo.converttimefromutc(v=VS.90).aspx相对=nofollow> ConvertTimeFromUtc 和的 ConvertTimeToUtc 可能是你追求的 - 但要小心你的意思是任何日期时间值是什么;你需要确保你总是知道你代表什么。

Once you've got a TimeZoneInfo and an instant that you want to convert, ConvertTimeFromUtc and ConvertTimeToUtc are probably what you're after - but be careful about what you mean by "any date time value"; you need to make sure you always know exactly what you're representing.

首创置业是有点毛茸茸的这一切，这是我开始<一的原因之一HREF =htt​​p://nodatime.org相对=nofollow>野田佳彦时间，它允许使用IANA时区数据以及首创置业的。

The BCL is somewhat woolly on all of this, which is one of the reasons I started Noda Time, which allows use of the IANA time zone data as well as the BCL.

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