PersianCalendar.IsLeapDay Method (Int32, Int32, Int32, Int32)
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Determines whether the specified date 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 from 1 through 9378 that represents the year.
- month
Type: System.Int32
An integer that represents the month and ranges from 1 through 12 if year is not 9378, or 1 through 10 if year is 9378.
- day
Type: System.Int32
An integer from 1 through 31 that represents the day.
- era
Type: System.Int32
An integer from 0 through 1 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, month, day, or era is outside the range supported by this calendar. |
Remarks
A leap day is a day that occurs only in a leap year.
Examples
The following example uses the IsLeapDay method.
using System;
using System.Globalization;
class Example
{
public static void Demo(System.Windows.Controls.TextBlock outputBlock)
{
//--------------------------------------------------------------------------------
// Get today's date.
//--------------------------------------------------------------------------------
outputBlock.Text += "\n................. Today ...........................\n";
PersianCalendar jc = new PersianCalendar();
DateTime thisDate = DateTime.Now;
// Display the current date using the Gregorian and Persian calendars.
outputBlock.Text += "Today is:\n";
outputBlock.Text += String.Format(" {0:dddd}, {0} in the Gregorian calendar.\n", thisDate);
outputBlock.Text += String.Format(" {0}, {1}/{2}/{3} {4}:{5}:{6} in the Persian calendar.\n",
jc.GetDayOfWeek(thisDate),
jc.GetMonth(thisDate),
jc.GetDayOfMonth(thisDate),
jc.GetYear(thisDate),
jc.GetHour(thisDate),
jc.GetMinute(thisDate),
jc.GetSecond(thisDate));
//--------------------------------------------------------------------------------
// Fields
//--------------------------------------------------------------------------------
outputBlock.Text += "\n............... Fields .............................\n";
outputBlock.Text += String.Format("PersianEra = {0}\n", PersianCalendar.PersianEra);
//--------------------------------------------------------------------------------
// Properties
//--------------------------------------------------------------------------------
outputBlock.Text += "\n............... Properties .........................\n";
outputBlock.Text += "Eras:";
foreach (int era in jc.Eras)
{
outputBlock.Text += String.Format(" era = {0}\n", era);
}
//--------------------------------------------------------------------------------
outputBlock.Text += "\nGregorian Date Range Supported by the Persian Calendar:\n";
outputBlock.Text += String.Format(" From {0:G}\n", jc.MinSupportedDateTime);
outputBlock.Text += String.Format(" To {0:G}\n", jc.MaxSupportedDateTime);
//--------------------------------------------------------------------------------
outputBlock.Text += String.Format("\nTwoDigitYearMax = {0}\n", jc.TwoDigitYearMax);
//--------------------------------------------------------------------------------
// Methods
//--------------------------------------------------------------------------------
outputBlock.Text += "\n............ Selected Methods .......................\n";
//--------------------------------------------------------------------------------
outputBlock.Text += String.Format("GetDayOfYear: day = {0}\n", jc.GetDayOfYear(thisDate));
//--------------------------------------------------------------------------------
outputBlock.Text += String.Format("GetDaysInMonth: days = {0}\n",
jc.GetDaysInMonth( thisDate.Year, thisDate.Month,
PersianCalendar.PersianEra));
//--------------------------------------------------------------------------------
outputBlock.Text += String.Format("GetDaysInYear: days = {0}\n",
jc.GetDaysInYear(thisDate.Year, PersianCalendar.PersianEra));
//--------------------------------------------------------------------------------
outputBlock.Text += String.Format("GetLeapMonth: leap month (if any) = {0}\n",
jc.GetLeapMonth(thisDate.Year, PersianCalendar.PersianEra));
//-------------------------------------------------------------
outputBlock.Text += String.Format("GetMonthsInYear: months in a year = {0}\n",
jc.GetMonthsInYear(thisDate.Year, PersianCalendar.PersianEra));
//--------------------------------------------------------------------------------
outputBlock.Text += String.Format("IsLeapDay: This is a leap day = {0}\n",
jc.IsLeapDay(thisDate.Year, thisDate.Month, thisDate.Day,
PersianCalendar.PersianEra));
//--------------------------------------------------------------------------------
outputBlock.Text += String.Format("IsLeapMonth: This is a leap month = {0}\n",
jc.IsLeapMonth(thisDate.Year, thisDate.Month,
PersianCalendar.PersianEra));
//--------------------------------------------------------------------------------
outputBlock.Text += String.Format("IsLeapYear: 1370 is a leap year = {0}\n",
jc.IsLeapYear(1370, PersianCalendar.PersianEra));
//--------------------------------------------------------------------------------
// Get the 4-digit year for a year whose last two digits are 99. The 4-digit year
// depends on the current value of the TwoDigitYearMax property.
outputBlock.Text += "ToFourDigitYear:\n";
outputBlock.Text += String.Format(" If TwoDigitYearMax = {0}, ToFourDigitYear(99) = {1}\n",
jc.TwoDigitYearMax, jc.ToFourDigitYear(99));
jc.TwoDigitYearMax = thisDate.Year;
outputBlock.Text += String.Format(" If TwoDigitYearMax = {0}, ToFourDigitYear(99) = {1}\n",
jc.TwoDigitYearMax, jc.ToFourDigitYear(99));
}
}
/*
The example produces the following results:
................. Today ...........................
Today is Wednesday, 6/14/2006 11:31:13 AM
............... Fields .............................
PersianEra = 1
............... Properties .........................
Eras: era = 1
MaxSupportedDateTime = 12/31/9999 11:59:59 PM
MinSupportedDateTime = 3/21/0622 12:00:00 AM
TwoDigitYearMax = 1410
................ Methods ...........................
AddMonths: thisDate + 6 months = 12/15/2006 11:31:13 AM
thisDate - 6 months = 12/15/2005 11:31:13 AM
AddYears: thisDate + 5 years = 6/14/2011 11:31:13 AM
thisDate - 3 years = 6/14/2003 11:31:13 AM
GetDayOfMonth: month = 24
GetDayOfWeek: day = Wednesday
GetDayOfYear: day = 86
GetDaysInMonth: days = 31
GetDaysInYear: days = 366
GetEra: era = 1
GetLeapMonth: leap month (if any) = 0
GetMonth: month = 3
GetMonthsInYear: months in a year = 12
GetYear: year = 1385
IsLeapDay: This is a leap day = False
IsLeapMonth: This is a leap month = False
IsLeapYear: 1370 is a leap year = True
ToDateTime:
Gregorian calendar: 6/10/2006 8:30:15 PM
Persian calendar: 3/20/1385 8:30:15 PM
ToFourDigitYear:
If TwoDigitYearMax = 1410, ToFourDigitYear(99) = 1399
If TwoDigitYearMax = 2006, ToFourDigitYear(99) = 1999
*/
Version Information
Silverlight
Supported in: 5
Platforms
For a list of the operating systems and browsers that are supported by Silverlight, see Supported Operating Systems and Browsers.