在c＃fx 3.5中的特定时区创建DateTime [英] Creating a DateTime in a specific Time Zone in c# fx 3.5

问题描述

我正在尝试创建一个单元测试，以测试机器上的时区如何更改，然后更正的情况。

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.

测试我需要能够在无本地时区创建DateTime对象，以确保运行测试的人能够成功地进行，无论它们位于何处。

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.

从我可以从DateTime构造函数中看到，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.

如何创建一个DateTime一个特定的时区如PST？

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

推荐答案

谈论我们/ library / system.timezone.aspxrel =nofollow noreferrer> TimeZone ，但我建议使用 TimeZoneInfo 。

个人而言，我喜欢在UTC的时候尽可能的保留东西，所以我建议一个这样的结构：

Personally I like keeping things in UTC where possible, 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TimeZone命名为TimeZoneInfo，使事情更加清晰 - 我更喜欢自己的名字。

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

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