TimeZoneInfo.AdjustmentRule クラス

定義

名前空間:: System

アセンブリ:: System.Runtime.dll

アセンブリ:: System.Core.dll

アセンブリ:: mscorlib.dll

アセンブリ:: netstandard.dll

夏時間への切り替えや夏時間からの切り替えなど、タイムゾーンの調整に関する情報を提供します。Provides information about a time zone adjustment, such as the transition to and from daylight saving time.

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

継承: Object
TimeZoneInfo.AdjustmentRule

属性: SerializableAttribute

実装: IEquatable<TimeZoneInfo.AdjustmentRule> IDeserializationCallback ISerializable

例

次の例では、ローカルシステムで定義されているすべてのタイムゾーンを取得し、その調整規則に関する完全な情報を表示します。The following example retrieves all time zones defined on the local system and displays complete information about their adjustment rules.

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();
   } 
}

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

この例で生成される出力の一部を次に示します。The following is a small portion of the output that is generated by the example. 正確な出力は、オペレーティングシステムと、その例を実行する日付によって異なります。The exact output will vary depending on the operating system and the date on which the example is run.

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

注釈

クラスは、 TimeZoneInfo.AdjustmentRule 夏時間の開始日と終了日をそれぞれ変化させ、そのデルタ (調整によってタイムゾーンの標準時間が変更される正確な量) に加えて、それぞれの時間の差を定義します。The TimeZoneInfo.AdjustmentRule class defines the effective start and end dates of a particular time change to and from daylight saving time, respectively, as well as its delta (the exact amount by which the adjustment causes the time zone's standard time to change). また、2つのプロパティは、 TimeZoneInfo.TransitionTime 標準時との間の各遷移が発生するタイミングを定義するオブジェクトを返します。In addition, two properties return TimeZoneInfo.TransitionTime objects that define when each transition to and from standard time occurs.

注意

クラスのインスタンス TimeZoneInfo.AdjustmentRule は変更できません。An instance of the TimeZoneInfo.AdjustmentRule class is immutable. オブジェクトが作成されると、その値を変更することはできません。Once an object has been created, its values cannot be modified.

オブジェクトを作成するには、 TimeZoneInfo.AdjustmentRule static ( Shared Visual Basic) メソッドを呼び出し TimeZoneInfo.AdjustmentRule.CreateAdjustmentRule ます。To create a TimeZoneInfo.AdjustmentRule object, call the static (Shared in Visual Basic) TimeZoneInfo.AdjustmentRule.CreateAdjustmentRule method. 次 TimeZoneInfo.AdjustmentRule に、メソッドの2つのオーバーロードにオブジェクトの配列を指定でき TimeZoneInfo.CreateCustomTimeZone ます。You can then supply an array of TimeZoneInfo.AdjustmentRule objects to two of the overloads of the TimeZoneInfo.CreateCustomTimeZone method. 特定のタイムゾーンの調整規則を取得するには、 TimeZoneInfo.GetAdjustmentRules オブジェクトの配列を返すメソッドを呼び出します TimeZoneInfo.AdjustmentRule 。To retrieve the adjustment rules of a particular time zone, call its TimeZoneInfo.GetAdjustmentRules method, which returns an array of TimeZoneInfo.AdjustmentRule objects.

プロパティ

DateEnd	調整規則が有効でなくなる日付を取得します。Gets the date when the adjustment rule ceases to be in effect.
DateStart	調整規則が有効になる日付を取得します。Gets the date when the adjustment rule takes effect.
DaylightDelta	タイムゾーンの夏時間を形成するために必要な時間を取得します。Gets the amount of time that is required to form the time zone's daylight saving time. この時間数は世界協定時刻 (UTC) に基づくタイムゾーンのオフセットに追加されます。This amount of time is added to the time zone's offset from Coordinated Universal Time (UTC).
DaylightTransitionEnd	夏時間から標準時へ戻る年次切り替えに関する情報を取得します。Gets information about the annual transition from daylight saving time back to standard time.
DaylightTransitionStart	標準時間から夏時間への年次切り替えに関する情報を取得します。Gets information about the annual transition from standard time to daylight saving time.

メソッド

CreateAdjustmentRule(DateTime, DateTime, TimeSpan, TimeZoneInfo+TransitionTime, TimeZoneInfo+TransitionTime)	特定のタイムゾーンの新しい調整規則を作成します。Creates a new adjustment rule for a particular time zone.
Equals(Object)	指定されたオブジェクトが現在のオブジェクトと等しいかどうかを判断します。Determines whether the specified object is equal to the current object. (継承元 Object)
Equals(TimeZoneInfo+AdjustmentRule)	現在の TimeZoneInfo.AdjustmentRule オブジェクトが 2 番目の TimeZoneInfo.AdjustmentRule オブジェクトと等しいかどうかを判断します。Determines whether the current TimeZoneInfo.AdjustmentRule object is equal to a second TimeZoneInfo.AdjustmentRule object.
GetHashCode()	ハッシュ関数として機能し、ハッシュアルゴリズムや、ハッシュテーブルのようなデータ構造に使用されます。Serves as a hash function for hashing algorithms and data structures such as hash tables.
GetType()	現在のインスタンスの Type を取得します。Gets the Type of the current instance. (継承元 Object)
MemberwiseClone()	現在の Object の簡易コピーを作成します。Creates a shallow copy of the current Object. (継承元 Object)
ToString()	現在のオブジェクトを表す文字列を返します。Returns a string that represents the current object. (継承元 Object)

明示的なインターフェイスの実装

IDeserializationCallback.OnDeserialization(Object)	TimeZoneInfo.AdjustmentRule オブジェクトの逆シリアル化の完了後に実行します。Runs when the deserialization of a TimeZoneInfo.AdjustmentRule object is completed.
ISerializable.GetObjectData(SerializationInfo, StreamingContext)	SerializationInfo オブジェクトをシリアル化するために必要なデータを、このオブジェクトに設定します。Populates a SerializationInfo object with the data that is required to serialize this object.

適用対象

こちらもご覧ください

TimeZoneInfo