DateTimeFormatInfo.GetEra(String) 方法
定義
重要
部分資訊涉及發行前產品，在發行之前可能會有大幅修改。 Microsoft 對此處提供的資訊，不做任何明確或隱含的瑕疵擔保。
傳回代表指定紀元的整數。
public:
int GetEra(System::String ^ eraName);public int GetEra (string eraName);member this.GetEra : string -> intPublic Function GetEra (eraName As String) As Integer參數
- eraName
- String
含有紀元名稱的字串。
傳回
如果 eraName 有效，則為表示紀元的整數，否則為 -1。
例外狀況
eraName 為 null。
範例
下列範例顯示 DateTimeFormatInfo 忽略紀元名稱中的標點符號，只有在行事曆是公曆，而文化特性使用紀元名稱 “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.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
End Class
'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
備註
紀元名稱是行事曆用來參照從固定點或事件算起的時間週期的名稱。 例如，“A.D.” 或 “C.E.” 是公曆中的目前紀元。
與 eraName 的比較不區分大小寫，例如“A.D”。
GetEra 只有在 GregorianCalendar 中選取 DateTimeFormatInfo.Calendar 且文化特性使用 “A.D” 做為紀元名稱時，才會忽略縮寫紀元名稱中的標點符號，也就是 “A.D”。
GetEra 會 eraName 與 傳 GetEraName 回的完整紀元名稱比較，並以 所 GetAbbreviatedEraName傳回的縮寫紀元名稱進行比較。
重要
日本曆法的紀元是以天皇的統治為基礎，因此有變更是正常的。 例如，2019 年 5 月 1 日之後，JapaneseCalendar 與 JapaneseLunisolarCalendar 中將開始使用「令和」。 此變更對使用這些日曆的所有應用程式都有影響。 如需詳細資訊，以及判斷您的應用程式是否受到影響，請參閱 在 .NET 的日曆中處理新紀元。 如需在 Windows 系統上測試應用程式以確保其整備時間變更的相關信息，請參閱 準備您的應用程式以進行日文紀元變更。 如需 .NET 中支援多個紀元的行事曆功能，以及使用支援多個紀元的行事歷時的最佳做法，請參閱 使用紀元。
