TimeZoneInfo.AdjustmentRule Класс

Определение

public: ref class TimeZoneInfo::AdjustmentRule sealed : IEquatable<TimeZoneInfo::AdjustmentRule ^>, System::Runtime::Serialization::IDeserializationCallback, System::Runtime::Serialization::ISerializable

public sealed class TimeZoneInfo.AdjustmentRule : IEquatable<TimeZoneInfo.AdjustmentRule>, System.Runtime.Serialization.IDeserializationCallback, System.Runtime.Serialization.ISerializable

[System.Serializable]
public sealed class TimeZoneInfo.AdjustmentRule : IEquatable<TimeZoneInfo.AdjustmentRule>, System.Runtime.Serialization.IDeserializationCallback, System.Runtime.Serialization.ISerializable

type TimeZoneInfo.AdjustmentRule = class
    interface IEquatable<TimeZoneInfo.AdjustmentRule>
    interface IDeserializationCallback
    interface ISerializable

type TimeZoneInfo.AdjustmentRule = class
    interface IDeserializationCallback
    interface ISerializable
    interface IEquatable<TimeZoneInfo.AdjustmentRule>

[<System.Serializable>]
type TimeZoneInfo.AdjustmentRule = class
    interface IEquatable<TimeZoneInfo.AdjustmentRule>
    interface ISerializable
    interface IDeserializationCallback

Public NotInheritable Class TimeZoneInfo.AdjustmentRule
Implements IDeserializationCallback, IEquatable(Of TimeZoneInfo.AdjustmentRule), ISerializable

Наследование

Object

TimeZoneInfo.AdjustmentRule

Атрибуты

SerializableAttribute

Реализации

IEquatable<TimeZoneInfo.AdjustmentRule> IDeserializationCallback ISerializable

Примеры

В следующем примере извлекаются все часовые пояса, определенные в локальной системе, и отображаются полные сведения о правилах корректировки.

private enum WeekOfMonth 
{
   First = 1,
   Second = 2,
   Third = 3,
   Fourth = 4,
   Last = 5,
}

private static void ShowStartAndEndDates()
{
   // Get all time zones from system
   ReadOnlyCollection<TimeZoneInfo> timeZones = TimeZoneInfo.GetSystemTimeZones();
   string[] monthNames = CultureInfo.CurrentCulture.DateTimeFormat.MonthNames;
   // Get each time zone
   foreach (TimeZoneInfo timeZone in timeZones)
   {
      TimeZoneInfo.AdjustmentRule[] adjustments = timeZone.GetAdjustmentRules();
      // Display message for time zones with no adjustments
      if (adjustments.Length == 0)
      {
         Console.WriteLine("{0} has no adjustment rules", timeZone.StandardName);
      }   
      else
      {
         // Handle time zones with 1 or 2+ adjustments differently
         bool showCount = false;
         int ctr = 0;
         string spacer = "";
         
         Console.WriteLine("{0} Adjustment rules", timeZone.StandardName);
         if (adjustments.Length > 1)
         {
            showCount = true;
            spacer = "   ";
         }   
         // Iterate adjustment rules
         foreach (TimeZoneInfo.AdjustmentRule adjustment in adjustments)
         {
            if (showCount)
            { 
               Console.WriteLine("   Adjustment rule #{0}", ctr+1);
               ctr++;
            }
            // Display general adjustment information
            Console.WriteLine("{0}   Start Date: {1:D}", spacer, adjustment.DateStart);
            Console.WriteLine("{0}   End Date: {1:D}", spacer, adjustment.DateEnd);
            Console.WriteLine("{0}   Time Change: {1}:{2:00} hours", spacer, 
                              adjustment.DaylightDelta.Hours, adjustment.DaylightDelta.Minutes);
            // Get transition start information
            TimeZoneInfo.TransitionTime transitionStart = adjustment.DaylightTransitionStart;
            Console.Write("{0}   Annual Start: ", spacer);
            if (transitionStart.IsFixedDateRule)
            {
               Console.WriteLine("On {0} {1} at {2:t}", 
                                 monthNames[transitionStart.Month - 1], 
                                 transitionStart.Day, 
                                 transitionStart.TimeOfDay);
            }
            else
            {
               Console.WriteLine("The {0} {1} of {2} at {3:t}", 
                                 ((WeekOfMonth)transitionStart.Week).ToString(), 
                                 transitionStart.DayOfWeek.ToString(), 
                                 monthNames[transitionStart.Month - 1], 
                                 transitionStart.TimeOfDay);
            }
            // Get transition end information
            TimeZoneInfo.TransitionTime transitionEnd = adjustment.DaylightTransitionEnd;
            Console.Write("{0}   Annual End: ", spacer);
            if (transitionEnd.IsFixedDateRule)
            {
               Console.WriteLine("On {0} {1} at {2:t}", 
                                 monthNames[transitionEnd.Month - 1], 
                                 transitionEnd.Day, 
                                 transitionEnd.TimeOfDay);
            }
            else
            {
               Console.WriteLine("The {0} {1} of {2} at {3:t}", 
                                 ((WeekOfMonth)transitionEnd.Week).ToString(), 
                                 transitionEnd.DayOfWeek.ToString(), 
                                 monthNames[transitionEnd.Month - 1], 
                                 transitionEnd.TimeOfDay);
            }
         }
      }   
      Console.WriteLine();
   } 
}

type WeekOfMonth = 
    | First = 1
    | Second = 2
    | Third = 3
    | Fourth = 4
    | Last = 5

let showStartAndEndDates () =
    // Get all time zones from system
    let timeZones = TimeZoneInfo.GetSystemTimeZones()
    let monthNames = CultureInfo.CurrentCulture.DateTimeFormat.MonthNames
    // Get each time zone
    for timeZone in timeZones do
        let adjustments = timeZone.GetAdjustmentRules()
        // Display message for time zones with no adjustments
        if adjustments.Length = 0 then
            printfn $"{timeZone.StandardName} has no adjustment rules"
        else
            // Handle time zones with 1 or 2+ adjustments differently
            let mutable ctr = 0
            let showCount, spacer = 
                if adjustments.Length > 1 then
                    true, "   "
                else 
                    false, ""
            printfn $"{timeZone.StandardName} Adjustment rules"

            // Iterate adjustment rules
            for adjustment in adjustments do
                if showCount then
                    printfn $"   Adjustment rule #{ctr + 1}"
                    ctr <- ctr + 1
                // Display general adjustment information
                printfn $"{spacer}   Start Date: {adjustment.DateStart:D}"
                printfn $"{spacer}   End Date: {adjustment.DateEnd:D}"
                printfn $"{spacer}   Time Change: {adjustment.DaylightDelta.Hours}:{adjustment.DaylightDelta.Minutes:D2} hours"
                // Get transition start information
                let transitionStart = adjustment.DaylightTransitionStart
                printf $"{spacer}   Annual Start: "
                if transitionStart.IsFixedDateRule then
                    printfn $"On {monthNames[transitionStart.Month - 1]} {transitionStart.Day} at {transitionStart.TimeOfDay:t}"
                else
                    printfn $"The {transitionStart.Week |> enum<WeekOfMonth>} {transitionStart.DayOfWeek} of {monthNames[transitionStart.Month - 1]} at {transitionStart.TimeOfDay:t}"
                // Get transition end information
                let transitionEnd = adjustment.DaylightTransitionEnd
                printf $"{spacer}   Annual End: "
                if transitionEnd.IsFixedDateRule then
                    printfn $"On {monthNames[transitionEnd.Month - 1]} {transitionEnd.Day} at {transitionEnd.TimeOfDay:t}"
                else
                    printfn $"The {enum<WeekOfMonth> transitionEnd.Week} {transitionEnd.DayOfWeek} of {monthNames[transitionEnd.Month - 1]} at {transitionEnd.TimeOfDay:t}" 
        Console.WriteLine()

Private Enum WeekOfMonth As Integer
   First = 1
   Second = 2
   Third = 3
   Fourth = 4
   Last = 5
End Enum

Private Sub ShowStartAndEndDates()
   ' Get all time zones from system
   Dim timeZones As ReadOnlyCollection(Of TimeZoneInfo) = TimeZoneInfo.GetSystemTimeZones()
   ' Get each time zone
   For Each timeZone As TimeZoneInfo In timeZones
      Dim adjustments() As TimeZoneInfo.AdjustmentRule = timeZone.GetAdjustmentRules()
      ' Display message for time zones with no adjustments
      If adjustments.Length = 0 Then
         Console.WriteLine("{0} has no adjustment rules", timeZone.StandardName)
      Else
         ' Handle time zones with 1 or 2+ adjustments differently
         Dim showCount As Boolean = False
         Dim ctr As Integer = 0
         Dim spacer As String = ""
         
         Console.WriteLine("{0} Adjustment rules", timeZone.StandardName)
         If adjustments.Length > 1 Then showCount = True : spacer = "   "  
         ' Iterate adjustment rules
         For Each adjustment As TimeZoneInfo.AdjustmentRule in adjustments
            If showCount Then 
               Console.WriteLine("   Adjustment rule #{0}", ctr+1)
               ctr += 1
            End If
            ' Display general adjustment information
            Console.WriteLine("{0}   Start Date: {1:D}", spacer, adjustment.DateStart)
            Console.WriteLine("{0}   End Date: {1:D}", spacer, adjustment.DateEnd)
            Console.WriteLine("{0}   Time Change: {1}:{2:00} hours", spacer, _
                              adjustment.DaylightDelta.Hours, adjustment.DaylightDelta.Minutes)
            ' Get transition start information
            Dim transitionStart As TimeZoneInfo.TransitionTime = adjustment.DaylightTransitionStart
            Console.Write("{0}   Annual Start: ", spacer)
            If transitionStart.IsFixedDateRule Then
               Console.WriteLine("On {0} {1} at {2:t}", _
                                 MonthName(transitionStart.Month), _
                                 transitionStart.Day, _
                                 transitionStart.TimeOfDay)
            Else
               Console.WriteLine("The {0} {1} of {2} at {3:t}", _
                                 CType(transitionStart.Week, WeekOfMonth).ToString(), _
                                 transitionStart.DayOfWeek.ToString(), _
                                 MonthName(transitionStart.Month), _
                                 transitionStart.TimeOfDay)
            End If
            ' Get transition end information
            Dim transitionEnd As TimeZoneInfo.TransitionTime = adjustment.DaylightTransitionEnd
                              
            Console.Write("{0}   Annual End: ", spacer)
            If transitionEnd.IsFixedDateRule Then
               Console.WriteLine("On {0} {1} at {2:t}", _
                                 MonthName(transitionEnd.Month), _
                                 transitionEnd.Day, _
                                 transitionEnd.TimeOfDay)
            Else
               Console.WriteLine("The {0} {1} of {2} at {3:t}", _
                                 CType(transitionEnd.Week, WeekOfMonth).ToString(), _
                                 transitionEnd.DayOfWeek.ToString(), _
                                 MonthName(transitionEnd.Month), _
                                 transitionEnd.TimeOfDay)
            End If
         Next
      End If   
      Console.WriteLine()
   Next 
End Sub

Ниже приведена небольшая часть выходных данных, создаваемых примером. Точные выходные данные зависят от операционной системы и даты выполнения примера.

Morocco Standard Time Adjustment rules
   Adjustment rule #1
      Start Date: Tuesday, January 01, 2008
      End Date: Wednesday, December 31, 2008
      Time Change: 1:00 hours
      Annual Start: The Last Saturday of May at 11:59 PM
      Annual End: The Last Sunday of August at 11:59 PM
   Adjustment rule #2
      Start Date: Thursday, January 01, 2009
      End Date: Thursday, December 31, 2009
      Time Change: 1:00 hours
      Annual Start: The Last Sunday of May at 11:59 PM
      Annual End: The Third Thursday of August at 11:59 PM

Coordinated Universal Time has no adjustment rules

GMT Standard Time Adjustment rules
   Start Date: Monday, January 01, 0001
   End Date: Friday, December 31, 9999
   Time Change: 1:00 hours
   Annual Start: The Last Sunday of March at 1:00 AM
   Annual End: The Last Sunday of October at 2:00 AM

Greenwich Standard Time has no adjustment rules

W. Europe Standard Time Adjustment rules
   Start Date: Monday, January 01, 0001
   End Date: Friday, December 31, 9999
   Time Change: 1:00 hours
   Annual Start: The Last Sunday of March at 2:00 AM
   Annual End: The Last Sunday of October at 3:00 AM

Central Europe Standard Time Adjustment rules
   Start Date: Monday, January 01, 0001
   End Date: Friday, December 31, 9999
   Time Change: 1:00 hours
   Annual Start: The Last Sunday of March at 2:00 AM
   Annual End: The Last Sunday of October at 3:00 AM

Romance Standard Time Adjustment rules
   Start Date: Monday, January 01, 0001
   End Date: Friday, December 31, 9999
   Time Change: 1:00 hours
   Annual Start: The Last Sunday of March at 2:00 AM
   Annual End: The Last Sunday of October at 3:00 AM

Central European Standard Time Adjustment rules
   Start Date: Monday, January 01, 0001
   End Date: Friday, December 31, 9999
   Time Change: 1:00 hours
   Annual Start: The Last Sunday of March at 2:00 AM
   Annual End: The Last Sunday of October at 3:00 AM

W. Central Africa Standard Time has no adjustment rules

Комментарии

Класс TimeZoneInfo.AdjustmentRule определяет действующие даты начала и окончания определенного времени, изменяющегося до летнего времени, соответственно, а также его разностное значение (точное количество, по которому корректировка приводит к изменению стандартного времени часового пояса). Кроме того, два свойства возвращают TimeZoneInfo.TransitionTime объекты, определяющие при каждом переходе на стандартный период времени и из них.

Чтобы создать объект TimeZoneInfo.AdjustmentRule, вызовите метод static (Shared в Visual Basic) TimeZoneInfo.AdjustmentRule.CreateAdjustmentRule. Затем можно указать массив TimeZoneInfo.AdjustmentRule объектов двумя перегрузками TimeZoneInfo.CreateCustomTimeZone метода. Чтобы получить правила корректировки определенного часового пояса, вызовите его TimeZoneInfo.GetAdjustmentRules метод, который возвращает массив TimeZoneInfo.AdjustmentRule объектов.

См. также раздел

• TimeZoneInfo