JapaneseCalendar.IsLeapDay Method (Int32, Int32, Int32, Int32)
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Determines whether the specified date in the specified era is a leap day.
Namespace: System.Globalization
Assembly: mscorlib (in mscorlib.dll)
Syntax
'Declaration
Public Overrides Function IsLeapDay ( _
year As Integer, _
month As Integer, _
day As Integer, _
era As Integer _
) As Boolean
public override bool IsLeapDay(
int year,
int month,
int day,
int era
)
Parameters
- year
Type: System.Int32
An integer that represents the year.
- month
Type: System.Int32
An integer from 1 to 12 that represents the month.
- day
Type: System.Int32
An integer from 1 to 31 that represents the day.
- era
Type: System.Int32
An integer that represents the era.
Return Value
Type: System.Boolean
true , if the specified day is a leap day; otherwise, false.
Exceptions
| Exception | Condition |
|---|---|
| ArgumentOutOfRangeException | year is outside the range supported by the calendar. -or- month is outside the range supported by the calendar. -or- day 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.
A leap day is a day that occurs only in a leap year. For example, the 29th day of Nigatsu (February) is the only leap day.
Examples
The following code example calls the IsLeapDay method for the last day of the second month (February) 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()
' Creates a holder for the last day of the second month (February).
Dim iLastDay As Integer
' 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 y
outputBlock.Text &= vbCrLf
' Checks five years in the current era.
outputBlock.Text &= "CurrentEra:"
For y = 1 To 5
iLastDay = myCal.GetDaysInMonth(y, 2, JapaneseCalendar.CurrentEra)
outputBlock.Text += String.Format(ControlChars.Tab + "{0}", myCal.IsLeapDay(y, 2, iLastDay, JapaneseCalendar.CurrentEra))
Next y
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
iLastDay = myCal.GetDaysInMonth(y, 2, myCal.Eras(i))
outputBlock.Text += String.Format(ControlChars.Tab + "{0}", myCal.IsLeapDay(y, 2, iLastDay, myCal.Eras(i)))
Next y
outputBlock.Text &= vbCrLf
Next i
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();
// Creates a holder for the last day of the second month (February).
int iLastDay;
// 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++)
{
iLastDay = myCal.GetDaysInMonth(y, 2, JapaneseCalendar.CurrentEra);
outputBlock.Text += String.Format("\t{0}", myCal.IsLeapDay(y, 2, iLastDay, 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++)
{
iLastDay = myCal.GetDaysInMonth(y, 2, myCal.Eras[i]);
outputBlock.Text += String.Format("\t{0}", myCal.IsLeapDay(y, 2, iLastDay, 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.