将 DateTimeOffset 转换为 DateTime 并为此 DateTime 添加偏移量

Question

我有 DateTimeOffset:

DateTimeOffset myDTO = DateTimeOffset.ParseExact(
                      "2015/01/15 17:37:00 -0500", "yyyy/MM/dd HH:mm:ss zzz", 
                      CultureInfo.InvariantCulture); 
Console.WriteLine(myDTO);

结果 => "1/15/2015 17:37:00 -05:00"

如何转换为 DateTime 并在结果 DateTime

中添加此偏移量 "-0500"

期望的结果 => "1/15/2015 22:37:00"

Answer 1

使用DateTimeOffset.UtcDateTime:

DateTime utc = myDTO.UtcDateTime; // 01/15/2015 22:37:00

Answer 2

使用 UTC 时间时，您不必为时间添加偏移量。根据您的示例，您指的是 UTC 时间。所以这意味着您可以像我在这里演示的那样使用 DateTimeOffset.UtcDateTime：

DateTimeOffset myDTO = DateTimeOffset.ParseExact(
          "2015/01/15 17:37:00 -0500", "yyyy/MM/dd HH:mm:ss zzz",
          CultureInfo.InvariantCulture);
Console.WriteLine(myDTO);  //Will print 1/15/2015 17:37:00 -5:00

//Expected result would need to be 1/15/2015 22:37:00 (Which is UTC time)
DateTime utc = myDTO.UtcDateTime;  //Yields another DateTime without the offset.
Console.WriteLine(utc); //Will print 1/15/2015 22:37:00 like asked

将 DateTimeOffset 转换为 DateTime 并为此 DateTime 添加偏移量

Convert DateTimeOffset to DateTime and add offset to this DateTime

c#

datetime

datetimeoffset