PersianCalendar.ToFourDigitYear Method

Converts the specified year to a four-digit year representation.

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

public override int ToFourDigitYear (
	int year
)
public int ToFourDigitYear (
	int year
)
public override function ToFourDigitYear (
	year : int
) : int
Not applicable.

Parameters

year

An integer from 1 through 9378 that represents the year to convert.

Return Value

An integer that contains the four-digit representation of year.

Exception typeCondition

ArgumentOutOfRangeException

year is less than 0 or greater than 9378.

This method converts the year parameter to a four-digit year representation using the TwoDigitYearMax property. The return value is the upper boundary of a 100-year range that allows a two-digit year to be properly translated to a four-digit year. For example, if the 100-year range is from 1930 through 2029, then a two-digit value of 30 is interpreted as 1930 while a two-digit value of 29 is interpreted as 2029.

ToFourDigitYear supports either a two-digit year or a four-digit year. Passing a two-digit year value (less than 100) causes the method to convert the value to a four-digit value according to the TwoDigitYearMax value representing the appropriate century. If the application supplies a four-digit year value that is within the supported calendar range to ToFourDigitYear, the method returns the actual input value. If the application supplies a four-digit value that is outside the supported calendar range, or if it supplies a negative value, the method throws an exception.

The following code example demonstrates the field, property, and method members of the PersianCalendar class.

// This example demonstrates the members of the PersianCalendar class.

using System;
using System.Globalization;

class Sample 
{
 public static void Main() 
 {
		//--------------------------------------------------------------------------------
		// Get today's date.
		//--------------------------------------------------------------------------------
 Console.WriteLine("\n................. Today ...........................\n");
 PersianCalendar jc = new PersianCalendar();
 DateTime thisDate = DateTime.Now;

		// Use thisDate twice to display the name of the day and the current date.
 Console.WriteLine("Today is {0:dddd}, {0}", thisDate);
		//--------------------------------------------------------------------------------
		// Fields
		//--------------------------------------------------------------------------------
 Console.WriteLine("\n............... Fields .............................\n");
 Console.WriteLine("PersianEra = {0}", PersianCalendar.PersianEra);
		//--------------------------------------------------------------------------------
		// Properties
		//--------------------------------------------------------------------------------
 Console.WriteLine("\n............... Properties .........................\n");
 Console.Write("Eras:");
 foreach (int era in jc.Eras)
 {
 Console.WriteLine(" era = {0}", era);
 }
		//--------------------------------------------------------------------------------
 Console.WriteLine("MaxSupportedDateTime = {0:G}", jc.MaxSupportedDateTime);
		//--------------------------------------------------------------------------------
 Console.WriteLine("MinSupportedDateTime = {0:G}", jc.MinSupportedDateTime);
		//--------------------------------------------------------------------------------
 Console.WriteLine("TwoDigitYearMax = {0}", jc.TwoDigitYearMax);
		//--------------------------------------------------------------------------------
		// Methods
		//--------------------------------------------------------------------------------
 Console.WriteLine("\n................ Methods ...........................\n");

		// Create a date six months in the future and another date six months in the past.

 Console.WriteLine("AddMonths: thisDate + 6 months = {0}\n" + 
 " thisDate - 6 months = {1}",
 jc.AddMonths(thisDate, 6), jc.AddMonths(thisDate, -6));
		//--------------------------------------------------------------------------------

		// Create a date five years in the future and another date three years in the past.

 Console.WriteLine("AddYears: thisDate + 5 years = {0}\n" + 
 " thisDate - 3 years = {1}",
 jc.AddYears(thisDate, 5), jc.AddYears(thisDate, -3));
		//--------------------------------------------------------------------------------
 Console.WriteLine("GetDayOfMonth: month = {0}", jc.GetDayOfMonth(thisDate));
		//--------------------------------------------------------------------------------
 Console.WriteLine("GetDayOfWeek: day = {0}", jc.GetDayOfWeek(thisDate));
		//--------------------------------------------------------------------------------
 Console.WriteLine("GetDayOfYear: day = {0}", jc.GetDayOfYear(thisDate));
		//--------------------------------------------------------------------------------
 Console.WriteLine("GetDaysInMonth: days = {0}", 
 jc.GetDaysInMonth( thisDate.Year, thisDate.Month, 
 PersianCalendar.PersianEra));
		//--------------------------------------------------------------------------------
 Console.WriteLine("GetDaysInYear: days = {0}", 
 jc.GetDaysInYear(thisDate.Year, PersianCalendar.PersianEra));
		//--------------------------------------------------------------------------------
 Console.WriteLine("GetEra: era = {0}", jc.GetEra(thisDate));
		//--------------------------------------------------------------------------------
 Console.WriteLine("GetLeapMonth: leap month (if any) = {0}", 
 jc.GetLeapMonth(thisDate.Year, PersianCalendar.PersianEra));
		//--------------------------------------------------------------------------------
 Console.WriteLine("GetMonth: month = {0}", jc.GetMonth(thisDate));
		//-------------------------------------------------------------
 Console.WriteLine("GetMonthsInYear: months in a year = {0}", 
 jc.GetMonthsInYear(thisDate.Year, PersianCalendar.PersianEra));
		//--------------------------------------------------------------------------------
 Console.WriteLine("GetYear: year = {0}", jc.GetYear(thisDate));
		//--------------------------------------------------------------------------------
 Console.WriteLine("IsLeapDay: This is a leap day = {0}", 
 jc.IsLeapDay(thisDate.Year, thisDate.Month, thisDate.Day, 
 PersianCalendar.PersianEra));
		//--------------------------------------------------------------------------------
 Console.WriteLine("IsLeapMonth: This is a leap month = {0}", 
 jc.IsLeapMonth(thisDate.Year, thisDate.Month, 
 PersianCalendar.PersianEra));
		//--------------------------------------------------------------------------------
 Console.WriteLine("IsLeapYear: 1370 is a leap year = {0}", 
 jc.IsLeapYear(1370, PersianCalendar.PersianEra));
		//--------------------------------------------------------------------------------
 DateTime dt1 = jc.ToDateTime(1385, 3, 20, 20, 30, 15, 500, 
 PersianCalendar.PersianEra);
 Console.WriteLine("ToDateTime:");
 Console.WriteLine(" Gregorian calendar: {0}\n" +
 " Persian calendar: {1}", dt1, "3/20/1385 8:30:25 PM");
		//--------------------------------------------------------------------------------

		// 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.

 Console.WriteLine("ToFourDigitYear:");
 Console.WriteLine(" If TwoDigitYearMax = {0}, ToFourDigitYear(99) = {1}", 
 jc.TwoDigitYearMax, jc.ToFourDigitYear(99));
 jc.TwoDigitYearMax = thisDate.Year;
 Console.WriteLine(" If TwoDigitYearMax = {0}, ToFourDigitYear(99) = {1}", 
 jc.TwoDigitYearMax, jc.ToFourDigitYear(99));
 }
}
/*
This code 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

*/

Windows 98, Windows Server 2000 SP4, Windows Millennium Edition, Windows Server 2003, Windows XP Media Center Edition, Windows XP Professional x64 Edition, Windows XP SP2, Windows XP Starter Edition

The Microsoft .NET Framework 3.0 is supported on Windows Vista, Microsoft Windows XP SP2, and Windows Server 2003 SP1.

.NET Framework

Supported in: 3.0, 2.0
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