在C＃中的特定时区中创建DateTime [英] Creating a DateTime in a specific Time Zone in c#

问题描述

我正在尝试创建一个单元测试，以测试由于未正确设置然后更正时区而在计算机上更改时区的情况。

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，我需要能够在一个非本地时区中创建DateTime对象，以确保运行该测试的人可以成功地进行操作，而不管他们位于何处。

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构造函数中可以看到，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.

如何使用以下方式创建DateTime

How do I create a DateTime with a specific timezone like PST?

推荐答案

Jon的答案讨论了 TimeZone ，但我建议使用钛

Jon's answer talks about TimeZone, but I'd suggest using TimeZoneInfo instead.

我个人希望尽可能将内容保留在UTC中（至少在过去； 为未来存储UTC 有潜在的问题），所以我建议采用这样的结构：

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); 
        }
    }        
}

您可能希望更改将 TimeZone命名为 TimeZoneInfo，以便使事情更清楚-我更喜欢由简报者命名。

You may wish to change the "TimeZone" names to "TimeZoneInfo" to make things clearer - I prefer the briefer names myself.

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