问题描述
我正在尝试创建一个单元测试来测试机器上时区何时更改的情况,因为它已被错误地设置然后更正.
I'm trying to create a unit test to test the case for when the timezone changes on a machine because it has been incorrectly set and then corrected.
在测试中,我需要能够在非本地时区创建 DateTime 对象,以确保运行测试的人无论身在何处都可以成功地执行此操作.
In the test I need to be able to create DateTime objects in a none local time zone to ensure that people running the test can do so successfully irrespective of where they are located.
从 DateTime 构造函数中可以看出,我可以将 TimeZone 设置为本地时区、UTC 时区或未指定.
From what I can see from the DateTime constructor I can set the TimeZone to be either the local timezone, the UTC timezone or not specified.
如何创建具有特定时区(如 PST)的 DateTime?
How do I create a DateTime with a specific timezone like PST?
推荐答案
Jon 的回答 谈到 TimeZone,但我建议使用 TimeZoneInfo 代替.
Jon's answer talks about TimeZone, but I'd suggest using TimeZoneInfo instead.
我个人喜欢尽可能保持 UTC 格式(至少在过去是这样;为未来存储 UTC 有潜在的问题),所以我建议这样的结构:
Personally I like keeping things in UTC where possible (at least for the past; storing UTC for the future has potential issues), so I'd suggest a structure like this:
public struct DateTimeWithZone
{
private readonly DateTime utcDateTime;
private readonly TimeZoneInfo timeZone;
public DateTimeWithZone(DateTime dateTime, TimeZoneInfo timeZone)
{
var dateTimeUnspec = DateTime.SpecifyKind(dateTime, DateTimeKind.Unspecified);
utcDateTime = TimeZoneInfo.ConvertTimeToUtc(dateTimeUnspec, timeZone);
this.timeZone = timeZone;
}
public DateTime UniversalTime { get { return utcDateTime; } }
public TimeZoneInfo TimeZone { get { return timeZone; } }
public DateTime LocalTime
{
get
{
return TimeZoneInfo.ConvertTime(utcDateTime, timeZone);
}
}
}
您可能希望将TimeZone"名称更改为TimeZoneInfo"以使事情更清楚 - 我自己更喜欢更简短的名称.
You may wish to change the "TimeZone" names to "TimeZoneInfo" to make things clearer - I prefer the briefer names myself.
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