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GregorianCalendar.IsLeapDay(Int32, Int32, Int32, Int32) 方法

定義

判斷指定紀元中指定的日期是否為閏日。

public:
 override bool IsLeapDay(int year, int month, int day, int era);
public override bool IsLeapDay (int year, int month, int day, int era);
override this.IsLeapDay : int * int * int * int -> bool
Public Overrides Function IsLeapDay (year As Integer, month As Integer, day As Integer, era As Integer) As Boolean

參數

year
Int32

表示年份的整數。

month
Int32

從 1 到 12 的整數,表示月份。

day
Int32

從 1 到 31 的整數,表示日期。

era
Int32

表示紀元的整數。

傳回

如果指定的日期為閏日,則為 true,否則為 false

例外狀況

era 不在曆法支援的範圍內。

-或-

year 不在曆法支援的範圍內。

-或-

month 不在曆法支援的範圍內。

-或-

day 不在曆法支援的範圍內。

範例

下列程式代碼範例會針對第二個月的最後一天呼叫 IsLeapDay, (2 月) 5 年。

using namespace System;
using namespace System::Globalization;
int main()
{
   
   // Creates and initializes a GregorianCalendar.
   GregorianCalendar^ myCal = gcnew GregorianCalendar;
   
   // Creates a holder for the last day of the second month (February).
   int iLastDay;
   
   // Displays the header.
   Console::Write( "YEAR\t" );
   for ( int y = 2001; y <= 2005; y++ )
      Console::Write( "\t {0}", y );
   Console::WriteLine();
   
   // Checks five years in the current era.
   Console::Write( "CurrentEra:" );
   for ( int y = 2001; y <= 2005; y++ )
   {
      iLastDay = myCal->GetDaysInMonth( y, 2, GregorianCalendar::CurrentEra );
      Console::Write( "\t {0}", myCal->IsLeapDay( y, 2, iLastDay, GregorianCalendar::CurrentEra ) );

   }
   Console::WriteLine();
   
   // Checks five years in each of the eras.
   for ( int i = 0; i < myCal->Eras->Length; i++ )
   {
      Console::Write( "Era {0}:\t", myCal->Eras[ i ] );
      for ( int y = 2001; y <= 2005; y++ )
      {
         iLastDay = myCal->GetDaysInMonth( y, 2, myCal->Eras[ i ] );
         Console::Write( "\t {0}", myCal->IsLeapDay( y, 2, iLastDay, myCal->Eras[ i ] ) );

      }
      Console::WriteLine();

   }
}

/*
This code produces the following output.

YEAR            2001    2002    2003    2004    2005
CurrentEra:     False   False   False   True    False
Era 1:          False   False   False   True    False

*/
using System;
using System.Globalization;

public class SamplesGregorianCalendar  {

   public static void Main()  {

      // Creates and initializes a GregorianCalendar.
      GregorianCalendar myCal = new GregorianCalendar();

      // Creates a holder for the last day of the second month (February).
      int iLastDay;

      // Displays the header.
      Console.Write( "YEAR\t" );
      for ( int y = 2001; y <= 2005; y++ )
         Console.Write( "\t{0}", y );
      Console.WriteLine();

      // Checks five years in the current era.
      Console.Write( "CurrentEra:" );
      for ( int y = 2001; y <= 2005; y++ )  {
         iLastDay = myCal.GetDaysInMonth( y, 2, GregorianCalendar.CurrentEra );
         Console.Write( "\t{0}", myCal.IsLeapDay( y, 2, iLastDay, GregorianCalendar.CurrentEra ) );
      }
      Console.WriteLine();

      // Checks five years in each of the eras.
      for ( int i = 0; i < myCal.Eras.Length; i++ )  {
         Console.Write( "Era {0}:\t", myCal.Eras[i] );
         for ( int y = 2001; y <= 2005; y++ )  {
            iLastDay = myCal.GetDaysInMonth( y, 2, myCal.Eras[i] );
            Console.Write( "\t{0}", myCal.IsLeapDay( y, 2, iLastDay, myCal.Eras[i] ) );
         }
         Console.WriteLine();
      }
   }
}

/*
This code produces the following output.

YEAR            2001    2002    2003    2004    2005
CurrentEra:     False   False   False   True    False
Era 1:          False   False   False   True    False

*/
Imports System.Globalization

Public Class SamplesGregorianCalendar   
   
   Public Shared Sub Main()

      ' Creates and initializes a GregorianCalendar.
      Dim myCal As New GregorianCalendar()

      ' Creates a holder for the last day of the second month (February).
      Dim iLastDay As Integer

      ' Displays the header.
      Console.Write("YEAR" + ControlChars.Tab)
      Dim y As Integer
      For y = 2001 To 2005
         Console.Write(ControlChars.Tab + "{0}", y)
      Next y
      Console.WriteLine()

      ' Checks five years in the current era.
      Console.Write("CurrentEra:")
      For y = 2001 To 2005
         iLastDay = myCal.GetDaysInMonth(y, 2, GregorianCalendar.CurrentEra)
         Console.Write(ControlChars.Tab + "{0}", myCal.IsLeapDay(y, 2, iLastDay, GregorianCalendar.CurrentEra))
      Next y
      Console.WriteLine()

      ' Checks five years in each of the eras.
      Dim i As Integer
      For i = 0 To myCal.Eras.Length - 1
         Console.Write("Era {0}:" + ControlChars.Tab, myCal.Eras(i))
         For y = 2001 To 2005
            iLastDay = myCal.GetDaysInMonth(y, 2, myCal.Eras(i))
            Console.Write(ControlChars.Tab + "{0}", myCal.IsLeapDay(y, 2, iLastDay, myCal.Eras(i)))
         Next y
         Console.WriteLine()
      Next i

   End Sub

End Class


'This code produces the following output.
'
'YEAR            2001    2002    2003    2004    2005
'CurrentEra:     False   False   False   True    False
'Era 1:          False   False   False   True    False

備註

公曆中的閏年會定義為一年,由四個平均除法,除非是100除。 不過,由 400 除的年份是閏年。 例如,1900 年不是閏年,而是 2000 年。 一般年份有 365 天,而閏年有 366 天。

閏日是只在閏年發生的一天。 在公曆中,2 月的第 29 天是唯一的閏日。

適用於

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