DateTime.IsLeapYear(Int32) 方法

定義

命名空間:

System

組件:

System.Runtime.dll

組件:

netstandard.dll

組件:

mscorlib.dll

傳回指定年份是否為閏年的指示。

public:
 static bool IsLeapYear(int year);

public static bool IsLeapYear (int year);

static member IsLeapYear : int -> bool

Public Shared Function IsLeapYear (year As Integer) As Boolean

參數

year

Int32

4 位數的年份。

傳回

Boolean

當 true 是閏年時為 year，否則為 false。

例外狀況

ArgumentOutOfRangeException

year 小於 1 或大於 9999。

範例

下列範例 IsLeapYear 會使用方法來判斷1994和2014之間的年份為閏年。 此範例也 AddYears 會說明使用方法將年份新增至閏日時的結果。

using System;

public class IsLeapYear
{
   public static void Main()
   {
      for (int year = 1994; year <= 2014; year++)
      {
         if (DateTime.IsLeapYear(year))
         {
            Console.WriteLine("{0} is a leap year.", year);
            DateTime leapDay = new DateTime(year, 2, 29);
            DateTime nextYear = leapDay.AddYears(1);
            Console.WriteLine("   One year from {0} is {1}.",
                              leapDay.ToString("d"),
                              nextYear.ToString("d"));
         }
      }
   }
}
// The example produces the following output:
//       1996 is a leap year.
//          One year from 2/29/1996 is 2/28/1997.
//       2000 is a leap year.
//          One year from 2/29/2000 is 2/28/2001.
//       2004 is a leap year.
//          One year from 2/29/2004 is 2/28/2005.
//       2008 is a leap year.
//          One year from 2/29/2008 is 2/28/2009.
//       2012 is a leap year.
//          One year from 2/29/2012 is 2/28/2013.

Module IsLeapYear
   Public Sub Main()
      For year As Integer = 1994 to 2014
         If DateTime.IsLeapYear(year) Then
            Console.WriteLine("{0} is a leap year.", year)
            Dim leapDay As New Date(year, 2, 29)
            Dim nextYear As Date = leapDay.AddYears(1)
            Console.WriteLine("   One year from {0} is {1}.", _
                              leapDay.ToString("d"), _
                              nextYear.ToString("d"))
         End If
      Next
   End Sub
End Module
' The example displays the following output:
'       1996 is a leap year.
'          One year from 2/29/1996 is 2/28/1997.
'       2000 is a leap year.
'          One year from 2/29/2000 is 2/28/2001.
'       2004 is a leap year.
'          One year from 2/29/2004 is 2/28/2005.
'       2008 is a leap year.
'          One year from 2/29/2008 is 2/28/2009.
'       2012 is a leap year.
'          One year from 2/29/2012 is 2/28/2013.

備註

year 指定為4位數的10位數基底10位數;例如，1996。

year 一律會被視為西曆中的年份。 若要判斷特定年份在某個其他行事曆中是否為閏年，請呼叫該行事曆物件的 IsLeapYear 方法。