C＃日期时间：转换为不同的时区 [英] C# Datetimes: Conversion for different time zones

问题描述

我有一大堆的日期时间，我跟踪我的应用程序。他们都在UTC时间。对于我的应用程序的一部分，我想这些时间之一发送电子邮件，但编辑要在特定的时区。

有两个主要的方面，我会处理，东海岸和得克萨斯州（达拉斯和休斯顿）

我也可以做一个新的日期时间，当我发送此电子邮件东部时区（ DateTime时间戳= DateTime.Now; ）

我的问题是这样的：

如果用户是在德州地区我如何转换我的时间，从东部到时间（1小时以内）？

我想是这样的：

  //时间戳转换为本地时间
            时间跨度TS = TimeZone.CurrentTimeZone.GetUtcOffset（时间戳）;
            timestamp.Add（TS）;            timestampString = timestamp.ToString（）;
 

但没有奏效。我也知道，这条线是无效的：

  timestamp.Hour = timestamp.Hour  -  1;
 

解决方案

使用的TimeZoneInfo 类到本地时间转换为时间在替代时区：

 的TimeZoneInfo EST = TimeZoneInfo.FindSystemTimeZoneById（东部标准时间）;
日期时间targetTime = TimeZoneInfo.ConvertTime（timeToConvert，EST）;
 

I have a bunch of date times that I keep track of for my app. They are all in UTC time. For part of my app I want to send an email with one of these times, but edited to be in that specific time zone.

There are only two major areas that I will deal with, the east coast and Texas (Dallas and Huston)

I can also make a new datetime when I send out this email to get the eastern time zone (DateTime timestamp = DateTime.Now;)

My Question is this:

If the user is in the texas area how can I convert my time from eastern to that time (1 hour less)?

I tried something like this:

            //Convert timestamp to local time
            TimeSpan ts = TimeZone.CurrentTimeZone.GetUtcOffset(timestamp);
            timestamp.Add(ts);

            timestampString = timestamp.ToString();

But that didn't work. I also know that this line is not valid:

timestamp.Hour = timestamp.Hour - 1;

解决方案

Use the TimeZoneInfo Class to convert a local time to a time in an alternative timezone:

TimeZoneInfo est = TimeZoneInfo.FindSystemTimeZoneById("Eastern Standard Time");
DateTime targetTime = TimeZoneInfo.ConvertTime(timeToConvert, est);

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