PersianCalendar.ToFourDigitYear(Int32) Method

Reference

Definition

Namespace:: System.Globalization

Assemblies:: mscorlib.dll, System.Globalization.Calendars.dll

Assembly:: System.Runtime.dll

Assembly:: System.Globalization.Calendars.dll

Assembly:: mscorlib.dll

Assembly:: netstandard.dll

Source:: PersianCalendar.cs

Source:: PersianCalendar.cs

Source:: PersianCalendar.cs

Important

Some information relates to prerelease product that may be substantially modified before it’s released. Microsoft makes no warranties, express or implied, with respect to the information provided here.

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

public:
 override int ToFourDigitYear(int year);

public override int ToFourDigitYear (int year);

override this.ToFourDigitYear : int -> int

Public Overrides Function ToFourDigitYear (year As Integer) As Integer

Parameters

year: Int32

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

Returns

Int32

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

Exceptions

ArgumentOutOfRangeException

year is less than 0 or greater than 9378.

Examples

The following code example demonstrates the use of the ToFourDigitYear method.

using System;
using System.Globalization;

class Sample
{
    public static void Main()
    {
      PersianCalendar jc = new PersianCalendar();
      DateTime thisDate = DateTime.Now;

        //--------------------------------------------------------------------------------
        // Properties
        //--------------------------------------------------------------------------------
      Console.WriteLine("\n........... Selected Properties .....................\n");
      Console.Write("Eras:");
      foreach (int era in jc.Eras)
      {
         Console.WriteLine(" era = {0}", era);
      }
        //--------------------------------------------------------------------------------
      Console.WriteLine("\nTwoDigitYearMax = {0}", jc.TwoDigitYearMax);
        //--------------------------------------------------------------------------------
        // Methods
        //--------------------------------------------------------------------------------
      Console.WriteLine("\n............ Selected Methods .......................\n");

        //--------------------------------------------------------------------------------
      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("GetLeapMonth: leap month (if any) = {0}",
                        jc.GetLeapMonth(thisDate.Year, PersianCalendar.PersianEra));
        //-------------------------------------------------------------
      Console.WriteLine("GetMonthsInYear: months in a year = {0}",
                        jc.GetMonthsInYear(thisDate.Year, PersianCalendar.PersianEra));
        //--------------------------------------------------------------------------------
      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));
        //--------------------------------------------------------------------------------

        // 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));
    }
}
// The example displays the following output:
//       ........... Selected Properties .....................
//
//       Eras: era = 1
//
//       TwoDigitYearMax = 99
//
//       ............ Selected Methods .......................
//
//       GetDayOfYear: day = 1
//       GetDaysInMonth: days = 31
//       GetDaysInYear: days = 365
//       GetLeapMonth: leap month (if any) = 0
//       GetMonthsInYear: months in a year = 12
//       IsLeapDay: This is a leap day = False
//       IsLeapMonth: This is a leap month = False
//       IsLeapYear: 1370 is a leap year = True
//       ToFourDigitYear:
//         If TwoDigitYearMax = 99, ToFourDigitYear(99) = 99
//         If TwoDigitYearMax = 2012, ToFourDigitYear(99) = 1999

Imports System.Globalization

Class Sample
    Public Shared Sub Main()
        '--------------------------------------------------------------------------------
        ' Get today's date.
        '--------------------------------------------------------------------------------
        Dim jc As New PersianCalendar()
        Dim thisDate As Date = Date.Now

        '--------------------------------------------------------------------------------
        ' Properties
        '--------------------------------------------------------------------------------
        Console.WriteLine(vbCrLf & _
                          "........... Selected Properties ....................." & vbCrLf)
        Console.Write("Eras:")
        Dim era As Integer
        For Each era In jc.Eras
            Console.WriteLine(" era = {0}", era)
        Next era
        '--------------------------------------------------------------------------------
        Console.WriteLine("TwoDigitYearMax = {0}", jc.TwoDigitYearMax)
        '--------------------------------------------------------------------------------
        ' Methods
        '--------------------------------------------------------------------------------
        Console.WriteLine(vbCrLf & _
                          "............ Selected Methods ......................." & vbCrLf)

        '--------------------------------------------------------------------------------
        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("GetLeapMonth: leap month (if any) = {0}", _
                           jc.GetLeapMonth(thisDate.Year, PersianCalendar.PersianEra))
        '--------------------------------------------------------------------------------
        Console.WriteLine("GetMonthsInYear: months in a year = {0}", _
                           jc.GetMonthsInYear(thisDate.Year, PersianCalendar.PersianEra))
        '--------------------------------------------------------------------------------
        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))
        '--------------------------------------------------------------------------------

        ' 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))
    End Sub
End Class 
' The example displays output like the following: 
'       ........... Seleted Properties .....................
'       
'       Eras: era = 1
'       
'       TwoDigitYearMax = 99
'       
'       ............ Selected Methods .......................
'       
'       GetDayOfYear: day = 1
'       GetDaysInMonth: days = 31
'       GetDaysInYear: days = 365
'       GetLeapMonth: leap month (if any) = 0
'       GetMonthsInYear: months in a year = 12
'       IsLeapDay: This is a leap day = False
'       IsLeapMonth: This is a leap month = False
'       IsLeapYear: 1370 is a leap year = True
'       ToFourDigitYear:
'         If TwoDigitYearMax = 99, ToFourDigitYear(99) = 99
'         If TwoDigitYearMax = 2012, ToFourDigitYear(99) = 1999

Remarks

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.

Applies to

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