DateTimeFormatInfo.GetEra(String) DateTimeFormatInfo.GetEra(String) DateTimeFormatInfo.GetEra(String) DateTimeFormatInfo.GetEra(String) Method

定義

指定した時代 (年号) を表す整数を返します。Returns the integer representing the specified era.

public:
 int GetEra(System::String ^ eraName);
public int GetEra (string eraName);
member this.GetEra : string -> int
Public Function GetEra (eraName As String) As Integer

パラメーター

eraName
String String String String

時代 (年号) の名前を格納している文字列。The string containing the name of the era.

戻り値

eraName が有効な場合は時代 (年号) を表す整数。それ以外の場合は -1。The integer representing the era, if eraName is valid; otherwise, -1.

例外

次の例ではDateTimeFormatInfo 、カレンダーがグレゴリオ暦で、カルチャで時代 (年号) が使用されている場合にのみ、時代 (年号) 名の句読点を無視することを示しています。The following example shows that DateTimeFormatInfo ignores the punctuation in the era name, only if the calendar is Gregorian and the culture uses the era name "A.D.".

using namespace System;
using namespace System::Globalization;
using namespace System::Collections;
int main()
{
   
   // Creates strings with punctuation and without.
   String^ strADPunc = "A.D.";
   String^ strADNoPunc = "AD";
   String^ strCEPunc = "C.E.";
   String^ strCENoPunc = "CE";
   
   // Calls DTFI::GetEra for each culture that uses GregorianCalendar as the default calendar.
   Console::WriteLine( "            ----- AD -----  ----- CE -----" );
   Console::WriteLine( "CULTURE     PUNC   NO PUNC  PUNC   NO PUNC  CALENDAR" );
   IEnumerator^ en = CultureInfo::GetCultures( CultureTypes::SpecificCultures )->GetEnumerator();
   while ( en->MoveNext() )
   {
      CultureInfo^ myCI = safe_cast<CultureInfo^>(en->Current);
      Console::Write( "{0, -12}", myCI );
      Console::Write( "{0,-7}{1,-9}", myCI->DateTimeFormat->GetEra( strADPunc ), myCI->DateTimeFormat->GetEra( strADNoPunc ) );
      Console::Write( "{0, -7}{1, -9}", myCI->DateTimeFormat->GetEra( strCEPunc ), myCI->DateTimeFormat->GetEra( strCENoPunc ) );
      Console::Write( "{0}", myCI->Calendar );
      Console::WriteLine();
   }
}

/*
This code produces the following output.  This output has been cropped for brevity.

            ----- AD -----  ----- CE -----
CULTURE     PUNC   NO PUNC  PUNC   NO PUNC  CALENDAR
ar-SA       -1     -1       -1     -1       System.Globalization.HijriCalendar
ar-IQ       1      1        -1     -1       System.Globalization.GregorianCalendar
ar-EG       1      1        -1     -1       System.Globalization.GregorianCalendar
ar-LY       1      1        -1     -1       System.Globalization.GregorianCalendar
ar-DZ       1      1        -1     -1       System.Globalization.GregorianCalendar
ar-MA       1      1        -1     -1       System.Globalization.GregorianCalendar
ar-TN       1      1        -1     -1       System.Globalization.GregorianCalendar
ar-OM       1      1        -1     -1       System.Globalization.GregorianCalendar
ar-YE       1      1        -1     -1       System.Globalization.GregorianCalendar
ar-SY       1      1        -1     -1       System.Globalization.GregorianCalendar
ar-JO       1      1        -1     -1       System.Globalization.GregorianCalendar
ar-LB       1      1        -1     -1       System.Globalization.GregorianCalendar
ar-KW       1      1        -1     -1       System.Globalization.GregorianCalendar
ar-AE       1      1        -1     -1       System.Globalization.GregorianCalendar
ar-BH       1      1        -1     -1       System.Globalization.GregorianCalendar
ar-QA       1      1        -1     -1       System.Globalization.GregorianCalendar
bg-BG       1      1        -1     -1       System.Globalization.GregorianCalendar
ca-ES       -1     -1       -1     -1       System.Globalization.GregorianCalendar
zh-TW       -1     -1       -1     -1       System.Globalization.GregorianCalendar
zh-CN       -1     -1       -1     -1       System.Globalization.GregorianCalendar
zh-HK       1      1        -1     -1       System.Globalization.GregorianCalendar
zh-SG       1      1        -1     -1       System.Globalization.GregorianCalendar
zh-MO       1      1        -1     -1       System.Globalization.GregorianCalendar
cs-CZ       -1     -1       -1     -1       System.Globalization.GregorianCalendar
da-DK       1      1        -1     -1       System.Globalization.GregorianCalendar

*/
using System;
using System.Globalization;


public class SamplesGregorianCalendar  {

   public static void Main()  {

      // Creates strings with punctuation and without.
      String strADPunc = "A.D.";
      String strADNoPunc = "AD";
      String strCEPunc = "C.E.";
      String strCENoPunc = "CE";

      // Calls DTFI.GetEra for each culture that uses GregorianCalendar as the default calendar.
      Console.WriteLine( "            ----- AD -----  ----- CE -----" );
      Console.WriteLine( "CULTURE     PUNC   NO PUNC  PUNC   NO PUNC  CALENDAR" );
      foreach ( CultureInfo myCI in CultureInfo.GetCultures( CultureTypes.SpecificCultures ) )  {
         Console.Write( "{0,-12}", myCI );
         Console.Write( "{0,-7}{1,-9}", myCI.DateTimeFormat.GetEra( strADPunc ), myCI.DateTimeFormat.GetEra( strADNoPunc ) );
         Console.Write( "{0,-7}{1,-9}", myCI.DateTimeFormat.GetEra( strCEPunc ), myCI.DateTimeFormat.GetEra( strCENoPunc ) );
         Console.Write( "{0}", myCI.Calendar );
         Console.WriteLine();
      }

   }

}

/*
This code produces the following output.  This output has been cropped for brevity.

            ----- AD -----  ----- CE -----
CULTURE     PUNC   NO PUNC  PUNC   NO PUNC  CALENDAR
ar-SA       -1     -1       -1     -1       System.Globalization.HijriCalendar
ar-IQ       1      1        -1     -1       System.Globalization.GregorianCalendar
ar-EG       1      1        -1     -1       System.Globalization.GregorianCalendar
ar-LY       1      1        -1     -1       System.Globalization.GregorianCalendar
ar-DZ       1      1        -1     -1       System.Globalization.GregorianCalendar
ar-MA       1      1        -1     -1       System.Globalization.GregorianCalendar
ar-TN       1      1        -1     -1       System.Globalization.GregorianCalendar
ar-OM       1      1        -1     -1       System.Globalization.GregorianCalendar
ar-YE       1      1        -1     -1       System.Globalization.GregorianCalendar
ar-SY       1      1        -1     -1       System.Globalization.GregorianCalendar
ar-JO       1      1        -1     -1       System.Globalization.GregorianCalendar
ar-LB       1      1        -1     -1       System.Globalization.GregorianCalendar
ar-KW       1      1        -1     -1       System.Globalization.GregorianCalendar
ar-AE       1      1        -1     -1       System.Globalization.GregorianCalendar
ar-BH       1      1        -1     -1       System.Globalization.GregorianCalendar
ar-QA       1      1        -1     -1       System.Globalization.GregorianCalendar
bg-BG       1      1        -1     -1       System.Globalization.GregorianCalendar
ca-ES       -1     -1       -1     -1       System.Globalization.GregorianCalendar
zh-TW       -1     -1       -1     -1       System.Globalization.GregorianCalendar
zh-CN       -1     -1       -1     -1       System.Globalization.GregorianCalendar
zh-HK       -1     -1       -1     -1       System.Globalization.GregorianCalendar
zh-SG       1      1        -1     -1       System.Globalization.GregorianCalendar
zh-MO       1      1        -1     -1       System.Globalization.GregorianCalendar
cs-CZ       -1     -1       -1     -1       System.Globalization.GregorianCalendar
da-DK       1      1        -1     -1       System.Globalization.GregorianCalendar

*/
Imports System
Imports System.Globalization

Public Class SamplesGregorianCalendar

   Public Shared Sub Main()

      ' Creates strings with punctuation and without.
      Dim strADPunc As [String] = "A.D."
      Dim strADNoPunc As [String] = "AD"
      Dim strCEPunc As [String] = "C.E."
      Dim strCENoPunc As [String] = "CE"

      ' Calls DTFI.GetEra for each culture that uses GregorianCalendar as the default calendar.
      Console.WriteLine("            ----- AD -----  ----- CE -----")
      Console.WriteLine("CULTURE     PUNC   NO PUNC  PUNC   NO PUNC  CALENDAR")
      Dim myCI As CultureInfo
      For Each myCI In  CultureInfo.GetCultures(CultureTypes.SpecificCultures)
         Console.Write("{0,-12}", myCI)
         Console.Write("{0,-7}{1,-9}", myCI.DateTimeFormat.GetEra(strADPunc), myCI.DateTimeFormat.GetEra(strADNoPunc))
         Console.Write("{0,-7}{1,-9}", myCI.DateTimeFormat.GetEra(strCEPunc), myCI.DateTimeFormat.GetEra(strCENoPunc))
         Console.Write("{0}", myCI.Calendar)
         Console.WriteLine()
      Next myCI

   End Sub 'Main 

End Class 'SamplesGregorianCalendar


'This code produces the following output.  This output has been cropped for brevity.
'
'            ----- AD -----  ----- CE -----
'CULTURE     PUNC   NO PUNC  PUNC   NO PUNC  CALENDAR
'ar-SA       -1     -1       -1     -1       System.Globalization.HijriCalendar
'ar-IQ       1      1        -1     -1       System.Globalization.GregorianCalendar
'ar-EG       1      1        -1     -1       System.Globalization.GregorianCalendar
'ar-LY       1      1        -1     -1       System.Globalization.GregorianCalendar
'ar-DZ       1      1        -1     -1       System.Globalization.GregorianCalendar
'ar-MA       1      1        -1     -1       System.Globalization.GregorianCalendar
'ar-TN       1      1        -1     -1       System.Globalization.GregorianCalendar
'ar-OM       1      1        -1     -1       System.Globalization.GregorianCalendar
'ar-YE       1      1        -1     -1       System.Globalization.GregorianCalendar
'ar-SY       1      1        -1     -1       System.Globalization.GregorianCalendar
'ar-JO       1      1        -1     -1       System.Globalization.GregorianCalendar
'ar-LB       1      1        -1     -1       System.Globalization.GregorianCalendar
'ar-KW       1      1        -1     -1       System.Globalization.GregorianCalendar
'ar-AE       1      1        -1     -1       System.Globalization.GregorianCalendar
'ar-BH       1      1        -1     -1       System.Globalization.GregorianCalendar
'ar-QA       1      1        -1     -1       System.Globalization.GregorianCalendar
'bg-BG       1      1        -1     -1       System.Globalization.GregorianCalendar
'ca-ES       -1     -1       -1     -1       System.Globalization.GregorianCalendar
'zh-TW       -1     -1       -1     -1       System.Globalization.GregorianCalendar
'zh-CN       -1     -1       -1     -1       System.Globalization.GregorianCalendar
'zh-HK       -1     -1       -1     -1       System.Globalization.GregorianCalendar
'zh-SG       1      1        -1     -1       System.Globalization.GregorianCalendar
'zh-MO       1      1        -1     -1       System.Globalization.GregorianCalendar
'cs-CZ       -1     -1       -1     -1       System.Globalization.GregorianCalendar
'da-DK       1      1        -1     -1       System.Globalization.GregorianCalendar

注釈

時代 (年号) 名は、固定されたポイントまたはイベントから reckoned 期間を参照するためにカレンダーで使用される名前です。The era name is the name a calendar uses to refer to a period of time reckoned from a fixed point or event. たとえば、"A.D." のようになります。For example, "A.D." または "紀元"or "C.E." グレゴリオ暦の現在の時代 (年号) です。is the current era in the Gregorian calendar.

eraNameの比較では大文字と小文字が区別されません (例: "A.D.")。The comparison with eraName is case-insensitive, for example, "A.D." は、"a.d." に相当します。is equivalent to "a.d.".

GetEraGregorianCalendarDateTimeFormatInfo.Calendarが選択されていて、カルチャが "A.D." を使用している場合にのみ、省略された時代 (年号) 名の句読点を無視します。GetEra ignores punctuation in abbreviated era names, only if the GregorianCalendar is selected in DateTimeFormatInfo.Calendar and the culture uses "A.D." 年号名、つまり "A.D."as the era name, that is, "A.D." は、"AD" に相当します。is equivalent to "AD".

GetEraeraNameによってGetEraName返された時代 (年号) GetAbbreviatedEraNameの完全名とを比較します。GetEra compares eraName with the full era name returned by GetEraName and with the abbreviated era name returned by GetAbbreviatedEraName.

重要

和暦の時代 (年号) は天皇の代に基づいているため、変更されることが予想されます。Eras in the Japanese calendars are based on the emperor's reign and are therefore expected to change. たとえば、JapaneseCalendarJapaneseLunisolarCalendar において、2019 年 5 月 1 日から令和時代が始まることになりました。For example, May 1, 2019 marked the beginning of the Reiwa era in the JapaneseCalendar and JapaneseLunisolarCalendar. このような時代 (年号) の変更は、これらのカレンダーを使用するすべてのアプリケーションに影響します。Such a change of era affects all applications that use these calendars. 詳細については「.NET での日本語のカレンダーの新しい時代」をご覧いただき、アプリケーションが影響を受けるかどうかを判断します。See Handling a new era in the Japanese calendar in .NET for more information and to determine whether your applications are affected. 日本語の時代の変更のためのアプリケーションの準備」をご覧いただき、時代の変更に対する状況を確認するために Windows システムでアプリケーションをテストします。See Prepare your application for the Japanese era change for information on testing your applications on Windows systems to ensure their readiness for the era change. 複数の時代 (年号) を含むカレンダーをサポートしている .NET の機能や、複数の時代 (年号) をサポートしているカレンダーを操作する際のベスト プラクティスについては、「Working with eras (時代 (年号) の操作)」をご覧ください。See Working with eras for features in .NET that support calendars with multiple eras and for best practices when working with calendars that support multiple eras.

適用対象

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