TimeZoneInfo.GetUtcOffset Метод

Определение

Вычисляет для определенной даты и времени смещение или разность между временем в данном часовом поясе и временем в формате UTC.Calculates the offset or difference between the time in this time zone and Coordinated Universal Time (UTC) for a particular date and time.

Перегрузки

GetUtcOffset(DateTime)

Вычисляет для определенной даты и времени смещение или разность между временем в данном часовом поясе и временем в формате UTC.Calculates the offset or difference between the time in this time zone and Coordinated Universal Time (UTC) for a particular date and time.

GetUtcOffset(DateTimeOffset)

Вычисляет для определенной даты и времени смещение или разность между временем в данном часовом поясе и временем в формате UTC.Calculates the offset or difference between the time in this time zone and Coordinated Universal Time (UTC) for a particular date and time.

GetUtcOffset(DateTime)

Вычисляет для определенной даты и времени смещение или разность между временем в данном часовом поясе и временем в формате UTC.Calculates the offset or difference between the time in this time zone and Coordinated Universal Time (UTC) for a particular date and time.

public:
 TimeSpan GetUtcOffset(DateTime dateTime);
public TimeSpan GetUtcOffset (DateTime dateTime);
member this.GetUtcOffset : DateTime -> TimeSpan

Параметры

dateTime
DateTime

Дата и время, для которых необходимо определить смещение.The date and time to determine the offset for.

Возвращаемое значение

Объект, в котором указывается разность во времени между двумя часовыми поясами.An object that indicates the time difference between the two time zones.

Примеры

В следующем примере показано использование метода GetUtcOffset(DateTime) с различными часовыми поясами и значениями дат, которые имеют разные значения свойств Kind.The following example illustrates the use of the GetUtcOffset(DateTime) method with different time zones and with date values that have different Kind property values.

using System;

[assembly:CLSCompliant(true)]
namespace TimeZoneInfoCode
{
   public class TimeOffsets
   {
      public static void Main()
      {
         TimeOffsets timeoff = new TimeOffsets();
         TimeZoneInfo cst = TimeZoneInfo.FindSystemTimeZoneById("Central Standard Time");
   
         timeoff.ShowOffset(new DateTime(2006, 6, 12, 11, 0, 0), TimeZoneInfo.Local);
         timeoff.ShowOffset(new DateTime(2007, 11, 4, 1, 0, 0), TimeZoneInfo.Local);
         timeoff.ShowOffset(new DateTime(2006, 12, 10, 15, 0, 0), TimeZoneInfo.Local);
         timeoff.ShowOffset(new DateTime(2007, 3, 11, 2, 30, 0), TimeZoneInfo.Local);
         timeoff.ShowOffset(DateTime.UtcNow, TimeZoneInfo.Local);
         timeoff.ShowOffset(new DateTime(2006, 6, 12, 11, 0, 0), TimeZoneInfo.Utc);
         timeoff.ShowOffset(new DateTime(2007, 11, 4, 1, 0, 0), TimeZoneInfo.Utc);
         timeoff.ShowOffset(new DateTime(2006, 12, 10, 3, 0, 0), TimeZoneInfo.Utc);
         timeoff.ShowOffset(new DateTime(2007, 3, 11, 2, 30, 0), TimeZoneInfo.Utc);
         timeoff.ShowOffset(DateTime.Now, TimeZoneInfo.Utc);
         timeoff.ShowOffset(new DateTime(2006, 6, 12, 11, 0, 0), cst);
         timeoff.ShowOffset(new DateTime(2007, 11, 4, 1, 0, 0), cst);
         timeoff.ShowOffset(new DateTime(2006, 12, 10, 15, 0, 0), cst);
         timeoff.ShowOffset(new DateTime(2007, 3, 11, 2, 30, 0, 0), cst);
         timeoff.ShowOffset(new DateTime(2007, 11, 14, 00, 00, 00, DateTimeKind.Local), cst);
      }
      
      private void ShowOffset(DateTime time, TimeZoneInfo timeZone)
      {
         DateTime convertedTime = time;  
         TimeSpan offset;
         
         if (time.Kind == DateTimeKind.Local && ! timeZone.Equals(TimeZoneInfo.Local)) 
            convertedTime = TimeZoneInfo.ConvertTime(time, TimeZoneInfo.Local, timeZone);
         else if (time.Kind == DateTimeKind.Utc && ! timeZone.Equals(TimeZoneInfo.Utc)) 
            convertedTime = TimeZoneInfo.ConvertTime(time, TimeZoneInfo.Utc, timeZone);         
   
         offset = timeZone.GetUtcOffset(time);
         if (time == convertedTime)
         {
            Console.WriteLine("{0} {1} ", time, 
                              timeZone.IsDaylightSavingTime(time) ? timeZone.DaylightName : timeZone.StandardName);
            Console.WriteLine("   It differs from UTC by {0} hours, {1} minutes.", 
                               offset.Hours, 
                               offset.Minutes);
         }
         else
         {
            Console.WriteLine("{0} {1} ", time, 
                              time.Kind == DateTimeKind.Utc ? "UTC" :  TimeZoneInfo.Local.Id);       
            Console.WriteLine("   converts to {0} {1}.", 
                              convertedTime, 
                              timeZone.Id);
            Console.WriteLine("   It differs from UTC by {0} hours, {1} minutes.", 
                              offset.Hours, offset.Minutes);  
         }
         Console.WriteLine();                                             
      }
   }
}
// The example produces the following output:
//
//       6/12/2006 11:00:00 AM Pacific Daylight Time 
//          It differs from UTC by -7 hours, 0 minutes.
//       
//       11/4/2007 1:00:00 AM Pacific Standard Time 
//          It differs from UTC by -8 hours, 0 minutes.
//       
//       12/10/2006 3:00:00 PM Pacific Standard Time 
//          It differs from UTC by -8 hours, 0 minutes.
//       
//       3/11/2007 2:30:00 AM Pacific Standard Time 
//          It differs from UTC by -8 hours, 0 minutes.
//       
//       2/2/2007 8:35:46 PM UTC 
//          converts to 2/2/2007 12:35:46 PM Pacific Standard Time.
//          It differs from UTC by -8 hours, 0 minutes.
//       
//       6/12/2006 11:00:00 AM UTC 
//          It differs from UTC by 0 hours, 0 minutes.
//       
//       11/4/2007 1:00:00 AM UTC 
//          It differs from UTC by 0 hours, 0 minutes.
//       
//       12/10/2006 3:00:00 AM UTC 
//          It differs from UTC by 0 hours, 0 minutes.
//       
//       3/11/2007 2:30:00 AM UTC 
//          It differs from UTC by 0 hours, 0 minutes.
//       
//       2/2/2007 12:35:46 PM Pacific Standard Time 
//          converts to 2/2/2007 8:35:46 PM UTC.
//          It differs from UTC by 0 hours, 0 minutes.
//       
//       6/12/2006 11:00:00 AM Central Daylight Time 
//          It differs from UTC by -5 hours, 0 minutes.
//       
//       11/4/2007 1:00:00 AM Central Standard Time 
//          It differs from UTC by -6 hours, 0 minutes.
//       
//       12/10/2006 3:00:00 PM Central Standard Time 
//          It differs from UTC by -6 hours, 0 minutes.
//       
//       3/11/2007 2:30:00 AM Central Standard Time 
//          It differs from UTC by -6 hours, 0 minutes.
//       
//       11/14/2007 12:00:00 AM Pacific Standard Time 
//          converts to 11/14/2007 2:00:00 AM Central Standard Time.
//          It differs from UTC by -6 hours, 0 minutes.
Option Strict On

<Assembly: CLSCompliant(True)>
Module TimeOffsets
   Public Sub Main()
      Dim cst As TimeZoneInfo = TimeZoneInfo.FindSystemTimeZoneById("Central Standard Time")

      ShowOffset(#6/12/2006 11:00AM#, TimeZoneInfo.Local)
      ShowOffset(#11/4/2007 1:00AM#, TimeZoneInfo.Local)
      ShowOffset(#12/10/2006 3:00PM#, TimeZoneInfo.Local)
      ShowOffset(#3/11/2007 2:30:00AM#, TimeZoneInfo.Local)
      ShowOffset(Date.UtcNow, TimeZoneInfo.Local)
      ShowOffset(#6/12/2006 11:00AM#, TimeZoneInfo.Utc)
      ShowOffset(#11/4/2007 1:00AM#, TimeZoneInfo.Utc)
      ShowOffset(#12/10/2006 3:00PM#, TimeZoneInfo.Utc)
      ShowOffset(#3/11/2007 2:30:00AM#, TimeZoneInfo.Utc)
      ShowOffset(Date.Now, TimeZoneInfo.Utc)
      ShowOffset(#6/12/2006 11:00AM#, cst)
      ShowOffset(#11/4/2007 1:00AM#, cst)
      ShowOffset(#12/10/2006 3:00PM#, cst)
      ShowOffset(#3/11/2007 2:30:00AM#, cst)
      ShowOffset(New Date(2007, 11, 14, 00, 00, 00, DateTimeKind.Local), cst)
   End Sub
   
   Private Sub ShowOffset(time As Date, timeZone As TimeZoneInfo)
      Dim convertedTime As Date = time  
      Dim offset As TimeSpan
      
      If time.Kind = DateTimeKind.Local And Not timeZone.Equals(TimeZoneInfo.Local) Then
         convertedTime = TimeZoneInfo.ConvertTime(time, TimeZoneInfo.Local, timeZone)
      ElseIf time.Kind = DateTimeKind.Utc And Not timeZone.Equals(TimeZoneInfo.Utc) Then
         convertedTime = TimeZoneInfo.ConvertTime(time, TimeZoneInfo.Utc, timeZone)         
      End If
      offset = timeZone.GetUtcOffset(time)
      If time = convertedTime Then
         Console.WriteLine("{0} {1} ", time, _
                           IIf(timeZone.IsDaylightSavingTime(time), timeZone.DaylightName, timeZone.StandardName))
         Console.WriteLine("   It differs from UTC by {0} hours, {1} minutes.", _
                            offset.Hours, _
                            offset.Minutes)
      Else
         Console.WriteLine("{0} {1} ", time, _
                           IIf(time.Kind = DateTimeKind.Utc, "UTC", TimeZoneInfo.Local.Id))       
         Console.WriteLine("   converts to {0} {1}.", _
                           convertedTime, _
                           timeZone.Id)
         Console.WriteLine("   It differs from UTC by {0} hours, {1} minutes.", _
                           offset.Hours, offset.Minutes)  
       End If
       Console.WriteLine()                                             
   End Sub
End Module
'
' The example produces the following output:
' 
'       6/12/2006 11:00:00 AM Pacific Daylight Time 
'          It differs from UTC by -7 hours, 0 minutes.
'       
'       11/4/2007 1:00:00 AM Pacific Standard Time 
'          It differs from UTC by -8 hours, 0 minutes.
'       
'       12/10/2006 3:00:00 PM Pacific Standard Time 
'          It differs from UTC by -8 hours, 0 minutes.
'       
'       3/11/2007 2:30:00 AM Pacific Standard Time 
'          It differs from UTC by -8 hours, 0 minutes.
'       
'       2/2/2007 8:35:46 PM UTC 
'          converts to 2/2/2007 12:35:46 PM Pacific Standard Time.
'          It differs from UTC by -8 hours, 0 minutes.
'       
'       6/12/2006 11:00:00 AM UTC 
'          It differs from UTC by 0 hours, 0 minutes.
'       
'       11/4/2007 1:00:00 AM UTC 
'          It differs from UTC by 0 hours, 0 minutes.
'       
'       12/10/2006 3:00:00 AM UTC 
'          It differs from UTC by 0 hours, 0 minutes.
'       
'       3/11/2007 2:30:00 AM UTC 
'          It differs from UTC by 0 hours, 0 minutes.
'       
'       2/2/2007 12:35:46 PM Pacific Standard Time 
'          converts to 2/2/2007 8:35:46 PM UTC.
'          It differs from UTC by 0 hours, 0 minutes.
'       
'       6/12/2006 11:00:00 AM Central Daylight Time 
'          It differs from UTC by -5 hours, 0 minutes.
'       
'       11/4/2007 1:00:00 AM Central Standard Time 
'          It differs from UTC by -6 hours, 0 minutes.
'       
'       12/10/2006 3:00:00 PM Central Standard Time 
'          It differs from UTC by -6 hours, 0 minutes.
'       
'       3/11/2007 2:30:00 AM Central Standard Time 
'          It differs from UTC by -6 hours, 0 minutes.
'       
'       11/14/2007 12:00:00 AM Pacific Standard Time 
'          converts to 11/14/2007 2:00:00 AM Central Standard Time.
'          It differs from UTC by -6 hours, 0 minutes.

Комментарии

Возвращенный промежуток времени включает все различия из-за применения правил коррекции к текущему часовому поясу.The returned time span includes any differences due to the application of adjustment rules to the current time zone. Он отличается от свойства BaseUtcOffset, которое возвращает разницу между временем в формате UTC и стандартным временем часового пояса и, следовательно, не учитывает правила коррекции.It differs from the BaseUtcOffset property, which returns the difference between Coordinated Universal Time (UTC) and the time zone's standard time and, therefore, does not take adjustment rules into account.

Если свойство Kind параметра dateTime не соответствует объекту часового пояса, этот метод выполняет необходимое преобразование перед возвратом результата.If the dateTime parameter's Kind property does not correspond to the time zone object, this method performs the necessary conversion before returning a result. Например, это может произойти, если свойство Kind DateTimeKind.Local, но объект часового пояса не является местным часовым поясом.For example, this can occur if the Kind property is DateTimeKind.Local but the time zone object is not the local time zone. Если dateTime является неоднозначным или если преобразованное время неоднозначно, этот метод интерпретирует неоднозначное время как стандартное время.If dateTime is ambiguous, or if the converted time is ambiguous, this method interprets the ambiguous time as a standard time. Если dateTime является недопустимым, этот метод возвращает объект TimeSpan, отражающий разницу между временем в формате UTC и стандартным временем часового пояса.If dateTime is invalid, this method returns a TimeSpan object that reflects the difference between UTC and the time zone's standard time.

Метод TimeZoneInfo.GetUtcOffset(DateTime) аналогичен методу GetUtcOffset класса TimeZone.The TimeZoneInfo.GetUtcOffset(DateTime) method is similar in operation to the GetUtcOffset method of the TimeZone class.

Дополнительно

GetUtcOffset(DateTimeOffset)

Вычисляет для определенной даты и времени смещение или разность между временем в данном часовом поясе и временем в формате UTC.Calculates the offset or difference between the time in this time zone and Coordinated Universal Time (UTC) for a particular date and time.

public:
 TimeSpan GetUtcOffset(DateTimeOffset dateTimeOffset);
public TimeSpan GetUtcOffset (DateTimeOffset dateTimeOffset);
member this.GetUtcOffset : DateTimeOffset -> TimeSpan

Параметры

dateTimeOffset
DateTimeOffset

Дата и время, для которых необходимо определить смещение.The date and time to determine the offset for.

Возвращаемое значение

Объект, в котором указывается разность между временем в формате UTC и временем в текущем часовом поясе.An object that indicates the time difference between Coordinated Universal Time (UTC) and the current time zone.

Комментарии

Возвращенный промежуток времени включает все различия из-за применения правил коррекции к текущему часовому поясу.The returned time span includes any differences due to the application of adjustment rules to the current time zone. Он отличается от свойства BaseUtcOffset, которое возвращает разницу между временем в формате UTC и стандартным временем часового пояса и, следовательно, не учитывает правила коррекции.It differs from the BaseUtcOffset property, which returns the difference between Coordinated Universal Time (UTC) and the time zone's standard time and, therefore, does not take adjustment rules into account.

Применяется к