获取另一个时区的日期时间,无论当地时区

正如其他人提到的,.NET 2不包含任何时区信息.但是,信息存储在注册表中,并且围绕它编写包装类非常简单:

SOFTWARE\\Microsoft\\Windows NT\\CurrentVersion\\Time Zones

包含所有时区的子键.TZI字段值包含时区的所有转换和偏置属性,但它们都填充在二进制数组中.最重要的位(偏差和日光)分别是存储在0和8位的int32:

int bias = BitConverter.ToInt32((byte[])tzKey.GetValue("TZI"), 0);
int daylightBias = BitConverter.ToInt32((byte[])tzKey.GetValue("TZI"), 8);

这是如何从注册表获取时区信息(DST)的存档？

来自 - http://msdn.microsoft.com/en-us/library/system.timezoneinfo.converttimefromutc.aspx

这允许按名称找到时区,以防美国从伦敦子午线向西或向东漂浮15度.

DateTime timeUtc = DateTime.UtcNow;
try
{
   TimeZoneInfo cstZone = TimeZoneInfo.FindSystemTimeZoneById("Central Standard Time");
   DateTime cstTime = TimeZoneInfo.ConvertTimeFromUtc(timeUtc, cstZone);
   Console.WriteLine("The date and time are {0} {1}.", 
                     cstTime, 
                     cstZone.IsDaylightSavingTime(cstTime) ?
                             cstZone.DaylightName : cstZone.StandardName);
}
catch (TimeZoneNotFoundException)
{
   Console.WriteLine("The registry does not define the Central Standard Time zone.");
}                           
catch (InvalidTimeZoneException)
{
   Console.WriteLine("Registry data on the Central STandard Time zone has been corrupted.");
}