datetime对象有一个“有心人”变量,它可以帮助的TimeZoneInfo知道如何对待它。在MSDN documentation为TimeZone.ConvertTime它具有如下:
DateTimeKind.Local,本地时间转换为在destinationTimeZone的时间。
DateTimeKind.Utc,将协调世界时(UTC)转换为destinationTimeZone中的时间。
DateTimeKind.Unspecified,假定为本地。
例如:
Console.WriteLine("Local time zone is '{0}'.", TimeZoneInfo.Local.Id);
var gmTime = new DateTime(2013, 03, 02, 01, 00, 00, DateTimeKind.Utc);
var localTime = new DateTime(2013, 03, 02, 01, 00, 00, DateTimeKind.Local);
var unspecifiedTime = new DateTime(2013, 03, 02, 01, 00, 00);
var timeZone = TimeZoneInfo.FindSystemTimeZoneById("Eastern Standard Time");
var gmTimeConverted = TimeZoneInfo.ConvertTime(gmTime, timeZone); // 03/02/2013 8:00:00AM
var localTimeConverted = TimeZoneInfo.ConvertTime(localTime, timeZone); // 03/02/2013
var unspecifiedTimeConverted = TimeZoneInfo.ConvertTime(unspecifiedTime, timeZone);
Console.WriteLine("Converting GMT to EST: {0}", gmTimeConverted);
Console.WriteLine("Converting Local to EST: {0}", localTimeConverted);
Console.WriteLine("Converting Unspecified to EST: {0}", unspecifiedTimeConverted);
结果:
Local time zone is 'Pacific Standard Time'.
Converting GMT to EST: 3/1/2013 8:00:00 PM
Converting Local to EST: 3/2/2013 4:00:00 AM
Converting Unspecified to EST: 3/2/2013 4:00:00 AM
或者,如果您的本地时区是 '东部标准时间',你得到这些结果
Local time zone is 'Eastern Standard Time'.
Converting GMT to EST: 3/1/2013 8:00:00 PM
Converting Local to EST: 3/2/2013 1:00:00 AM
Converting Unspecified to EST: 3/2/2013 1:00:00 AM
如果您希望TimeZoneInfo像Utc那样对待“未指定”,您应该像TimeZoneInfo.ConvertTimeFromUtc一样运行。再次从MSDN documentation
DateTimeKind.Local,引发ArgumentException。
DateTimeKind.Unspecified或DateTimeKind.Utc,从协调世界时(UTC)转换而来。
您是否考虑过使用野田时间呢? https://code.google.com/p/noda-time/ – 2013-03-02 01:42:27
我也会建议noda时间,我也用过http://www.babiej.demon.nl/Tz4Net/main.htm成功 – JeremyWeir 2013-03-02 01:43:16
@ RayCheng我会给它一个镜头。谢谢。 – 2013-03-02 01:45:43