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JapaneseCalendar.IsLeapYear Method (Int32, Int32)

Microsoft Silverlight will reach end of support after October 2021. Learn more.

Determines whether the specified year in the specified era is a leap year.

Namespace:  System.Globalization
Assembly:  mscorlib (in mscorlib.dll)

Syntax

'Declaration
Public Overrides Function IsLeapYear ( _
    year As Integer, _
    era As Integer _
) As Boolean
public override bool IsLeapYear(
    int year,
    int era
)

Parameters

  • year
    Type: System.Int32
    An integer that represents the year.
  • era
    Type: System.Int32
    An integer that represents the era.

Return Value

Type: System.Boolean
true , if the specified year is a leap year; otherwise, false.

Exceptions

Exception Condition
ArgumentOutOfRangeException

year is outside the range supported by the calendar.

-or-

era is outside the range supported by the calendar.

Remarks

Leap years in the Japanese calendar correspond to the same leap years in the Gregorian calendar. A leap year in the Gregorian calendar is defined as a Gregorian year that is evenly divisible by four, except if it is divisible by 100. However, Gregorian years that are divisible by 400 are leap years. A common year has 365 days and a leap year has 366 days.

Examples

The following code example calls the IsLeapYear method for five years in each of the eras.

Imports System.Globalization

Public Class Example
   Public Shared Sub Demo(ByVal outputBlock As System.Windows.Controls.TextBlock)
      ' Creates and initializes a JapaneseCalendar.
      Dim myCal As New JapaneseCalendar()

      ' Displays the header.
      outputBlock.Text &= "YEAR" + ControlChars.Tab
      Dim y As Integer
      For y = 1 To 5
         outputBlock.Text += String.Format(ControlChars.Tab + "{0}", y)
      Next
      outputBlock.Text &= vbCrLf

      ' Checks five years in the current era.
      outputBlock.Text &= "CurrentEra:"
      For y = 1 To 5
         outputBlock.Text += String.Format(ControlChars.Tab + "{0}", myCal.IsLeapYear(y, JapaneseCalendar.CurrentEra))
      Next
      outputBlock.Text &= vbCrLf

      ' Checks five years in each of the eras.
      Dim i As Integer
      For i = 0 To myCal.Eras.Length - 1
         outputBlock.Text += String.Format("Era {0}:" + ControlChars.Tab, myCal.Eras(i))
         For y = 1 To 5
            outputBlock.Text += String.Format(ControlChars.Tab + "{0}", myCal.IsLeapYear(y, myCal.Eras(i)))
         Next 
         outputBlock.Text &= vbCrLf
      Next
   End Sub 
End Class 
' This example produces the following output.
'       YEAR            1       2       3       4       5
'       CurrentEra:     False   False   False   True    False
'       Era 4:          False   False   False   True    False
'       Era 3:          False   False   True    False   False
'       Era 2:          True    False   False   False   True
'       Era 1:          True    False   False   False   True
using System;
using System.Globalization;


public class Example
{

   public static void Demo(System.Windows.Controls.TextBlock outputBlock)
   {

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

      // Displays the header.
      outputBlock.Text += "YEAR\t";
      for (int y = 1; y <= 5; y++)
         outputBlock.Text += String.Format("\t{0}", y);
      outputBlock.Text += "\n";

      // Checks five years in the current era.
      outputBlock.Text += "CurrentEra:";
      for (int y = 1; y <= 5; y++)
         outputBlock.Text += String.Format("\t{0}", myCal.IsLeapYear(y, JapaneseCalendar.CurrentEra));
      outputBlock.Text += "\n";

      // Checks five years in each of the eras.
      for (int i = 0; i < myCal.Eras.Length; i++)
      {
         outputBlock.Text += String.Format("Era {0}:\t", myCal.Eras[i]);
         for (int y = 1; y <= 5; y++)
            outputBlock.Text += String.Format("\t{0}", myCal.IsLeapYear(y, myCal.Eras[i]));
         outputBlock.Text += "\n";
      }

   }

}

/*
This code produces the following output.

YEAR            1       2       3       4       5
CurrentEra:     False   False   False   True    False
Era 4:          False   False   False   True    False
Era 3:          False   False   True    False   False
Era 2:          True    False   False   False   True
Era 1:          True    False   False   False   True

*/

Version Information

Silverlight

Supported in: 5, 4, 3

Silverlight for Windows Phone

Supported in: Windows Phone OS 7.1, Windows Phone OS 7.0

XNA Framework

Supported in: Xbox 360, Windows Phone OS 7.0

Platforms

For a list of the operating systems and browsers that are supported by Silverlight, see Supported Operating Systems and Browsers.