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TaiwanCalendar.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 Taiwan 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 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 TaiwanCalendar.
      Dim myCal As New TaiwanCalendar()

      ' 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 = 90 To 94
         outputBlock.Text += String.Format(ControlChars.Tab + "{0}", y)
      Next 
      outputBlock.Text &= vbCrLf

      ' Checks five years in the current era.
      outputBlock.Text &= "CurrentEra:"
      For y = 90 To 94
         iLastDay = myCal.GetDaysInMonth(y, 2, TaiwanCalendar.CurrentEra)
         outputBlock.Text += String.Format(ControlChars.Tab + "{0}", myCal.IsLeapDay(y, 2, iLastDay, TaiwanCalendar.CurrentEra))
      Next 
      outputBlock.Text &= vbCrLf

      ' Checks five years in each of the eras.
      For i As Integer = 0 To myCal.Eras.Length - 1
         outputBlock.Text += String.Format("Era {0}:" + ControlChars.Tab, myCal.Eras(i))
         For y = 90 To 94
            iLastDay = myCal.GetDaysInMonth(y, 2, myCal.Eras(i))
            outputBlock.Text += String.Format(ControlChars.Tab + "{0}", myCal.IsLeapDay(y, 2, iLastDay, myCal.Eras(i)))
         Next 
         outputBlock.Text &= vbCrLf
      Next 
   End Sub 
End Class 
' This example produces the following output.
'       YEAR            90      91      92      93      94
'       CurrentEra:     False   False   False   True    False
'       Era 1:          False   False   False   True    False

using System;
using System.Globalization;


public class Example
{

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

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

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

      // Displays the header.
      outputBlock.Text += "YEAR\t";
      for (int y = 90; y <= 94; y++)
         outputBlock.Text += String.Format("\t{0}", y);
      outputBlock.Text += "\n";

      // Checks five years in the current era.
      outputBlock.Text += "CurrentEra:";
      for (int y = 90; y <= 94; y++)
      {
         iLastDay = myCal.GetDaysInMonth(y, 2, TaiwanCalendar.CurrentEra);
         outputBlock.Text += String.Format("\t{0}", myCal.IsLeapDay(y, 2, iLastDay, TaiwanCalendar.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 = 90; y <= 94; 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            90      91      92      93      94
CurrentEra:     False   False   False   True    False
Era 1:          False   False   False   True    False

*/

Version Information

Silverlight

Supported in: 5, 4, 3

Silverlight for Windows Phone

Supported in: 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.