Artikel
11/18/2011

HebrewCalendar.IsLeapYear Method (Int32, Int32)

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Updated: October 2010

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. Specify Calendar.Eras[Calendar.CurrentEra].

Return Value

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

Exceptions

Exception	Condition
ArgumentOutOfRangeException	year or era is outside the range supported by this calendar.

Remarks

This implementation of the HebrewCalendar class recognizes only the Hebrew years 5343 to 5999 (1583 to 2239 in the Gregorian calendar).

In every 19-year cycle that ends with a year that is evenly divisible by 19, the 3rd, 6th, 8th, 11th, 14th, 17th, and 19th years are leap years. A common year can have from 353 to 355 days, depending on the placement of Jewish holidays. A leap year can have from 383 to 385 days.

Examples

The following code example calls IsLeapYear 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 HebrewCalendar.
      Dim myCal As New HebrewCalendar()

      ' Displays the header.
      outputBlock.Text &= "YEAR" + ControlChars.Tab
      Dim y As Integer
      For y = 5761 To 5765
         outputBlock.Text += String.Format(ControlChars.Tab + "{0}", y)
      Next
      outputBlock.Text &= vbCrLf

      ' Checks five years in the current era.
      outputBlock.Text &= "CurrentEra:"
      For y = 5761 To 5765
         outputBlock.Text += String.Format(ControlChars.Tab + "{0}", myCal.IsLeapYear(y, HebrewCalendar.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 = 5761 To 5765
            outputBlock.Text += String.Format(ControlChars.Tab + "{0}", myCal.IsLeapYear(y, myCal.Eras(i)))
         Next 
         outputBlock.Text &= vbCrLf
      Next 
   End Sub 
End Class 
'This code produces the following output.
'       YEAR            5761    5762    5763    5764    5765
'       CurrentEra:     False   False   True    False   True
'       Era 1:          False   False   True    False   True

using System;
using System.Globalization;


public class Example
{

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

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

      // Displays the header.
      outputBlock.Text += "YEAR\t";
      for (int y = 5761; y <= 5765; y++)
         outputBlock.Text += String.Format("\t{0}", y);
      outputBlock.Text += "\n";

      // Checks five years in the current era.
      outputBlock.Text += "CurrentEra:";
      for (int y = 5761; y <= 5765; y++)
         outputBlock.Text += String.Format("\t{0}", myCal.IsLeapYear(y, HebrewCalendar.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 = 5761; y <= 5765; y++)
            outputBlock.Text += String.Format("\t{0}", myCal.IsLeapYear(y, myCal.Eras[i]));
         outputBlock.Text += "\n";
      }

   }

}

/*
This code produces the following output.

YEAR            5761    5762    5763    5764    5765
CurrentEra:     False   False   True    False   True
Era 1:          False   False   True    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.

Change History

Date	History	Reason
October 2010	Corrected information about the Calendar.CurrentEra field.	Content bug fix.

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