UmAlQuraCalendar.AddMonths Method

Note: This method is new in the .NET Framework version 2.0.

Calculates a date that is a specified number of months away from a specified initial date.

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

public override DateTime AddMonths (
	DateTime time,
	int months
)
public DateTime AddMonths (
	DateTime time, 
	int months
)
public override function AddMonths (
	time : DateTime, 
	months : int
) : DateTime

Parameters

time

The DateTime object to add months to.

months

The positive or negative number of months to add.

Return Value

A DateTime object that represents the date yielded by adding the number of months specified by the months parameter to the date specified by the time parameter.

Exception typeCondition

ArgumentException

The resulting date is outside the range supported by the UmAlQuraCalendar type.

ArgumentOutOfRangeException

months is less than -120,000 or greater than 120,000.

The day part of the resulting DateTime object is affected if the resulting day is not a valid day in the resulting month of the resulting year; it is changed to the last valid day in the resulting month of the resulting year. The year part of the resulting DateTime object is affected if the resulting month is outside the year of the specified DateTime object. This implementation supports only the current era; therefore, an exception is thrown if the resulting year is outside the era of the specified DateTime object. The time-of-day part of the resulting DateTime object remains the same as the specified DateTime object.

For example, if the specified month is Zulkadah, which has 30 days, the specified day is the 30th day of that month, and the value of the months parameter is 3, the resulting year is one more than the specified year, the resulting month is Safar, and the resulting day is the 29th day, which is the last day in Safar.

If the value of the months parameter is negative, the resulting DateTime object is earlier than the specified DateTime object.

The following code example displays the values of several components of a DateTime object in terms of the Hijri calendar.

using System;
using System.Globalization;


public class SamplesHijriCalendar  {

   public static void Main()  {

      // Sets a DateTime to April 3, 2002 of the Gregorian calendar.
      DateTime myDT = new DateTime( 2002, 4, 3, new GregorianCalendar() );

      // Creates an instance of the HijriCalendar.
      HijriCalendar myCal = new HijriCalendar();

      // Displays the values of the DateTime.
      Console.WriteLine( "April 3, 2002 of the Gregorian calendar equals the following in the Hijri calendar:" );
      DisplayValues( myCal, myDT );

      // Adds two years and ten months.
      myDT = myCal.AddYears( myDT, 2 );
      myDT = myCal.AddMonths( myDT, 10 );

      // Displays the values of the DateTime.
      Console.WriteLine( "After adding two years and ten months:" );
      DisplayValues( myCal, myDT );

   }

   public static void DisplayValues( Calendar myCal, DateTime myDT )  {
      Console.WriteLine( "   Era:        {0}", myCal.GetEra( myDT ) );
      Console.WriteLine( "   Year:       {0}", myCal.GetYear( myDT ) );
      Console.WriteLine( "   Month:      {0}", myCal.GetMonth( myDT ) );
      Console.WriteLine( "   DayOfYear:  {0}", myCal.GetDayOfYear( myDT ) );
      Console.WriteLine( "   DayOfMonth: {0}", myCal.GetDayOfMonth( myDT ) );
      Console.WriteLine( "   DayOfWeek:  {0}", myCal.GetDayOfWeek( myDT ) );
      Console.WriteLine();
   }

}

/*
This code produces the following output.

April 3, 2002 of the Gregorian calendar equals the following in the Hijri calendar:
   Era:        1
   Year:       1423
   Month:      1
   DayOfYear:  21
   DayOfMonth: 21
   DayOfWeek:  Wednesday

After adding two years and ten months:
   Era:        1
   Year:       1425
   Month:      11
   DayOfYear:  316
   DayOfMonth: 21
   DayOfWeek:  Saturday

*/

import System.*;
import System.Globalization.*;

public class SamplesHijriCalendar
{  
    public static void main(String[] args)
    {
        // Sets a DateTime to April 3, 2002 of the Gregorian calendar.
        DateTime myDT =  new DateTime(2002, 4, 3, new GregorianCalendar());

        // Creates an instance of the HijriCalendar.
        HijriCalendar myCal =  new HijriCalendar();

        // Displays the values of the DateTime.
        Console.WriteLine("April 3,2002 of the Gregorian calendar equals the"
            + " following in the Hijri calendar:");
        DisplayValues(myCal, myDT);

        // Adds two years and ten months.
        myDT = myCal.AddYears(myDT, 2);
        myDT = myCal.AddMonths(myDT, 10);

        // Displays the values of the DateTime.
        Console.WriteLine("After adding two years and ten months:");
        DisplayValues(myCal, myDT);
    } //main    
   
    public static void DisplayValues(Calendar myCal, DateTime myDT)
    {
        Console.WriteLine("   Era:        {0}",
            System.Convert.ToString(myCal.GetEra(myDT)));
        Console.WriteLine("   Year:       {0}",
            System.Convert.ToString(myCal.GetYear(myDT)));
        Console.WriteLine("   Month:      {0}",
            System.Convert.ToString(myCal.GetMonth(myDT)));
        Console.WriteLine("   DayOfYear:  {0}",
            System.Convert.ToString(myCal.GetDayOfYear(myDT)));
        Console.WriteLine("   DayOfMonth: {0}",
            System.Convert.ToString(myCal.GetDayOfMonth(myDT)));
        Console.WriteLine("   DayOfWeek:  {0}",
            System.Convert.ToString(myCal.GetDayOfWeek(myDT)));
        Console.WriteLine();
    } //DisplayValues
} //SamplesHijriCalendar 

/*
This code produces the following output.

April 3, 2002 of the Gregorian calendar equals the following in the 
Hijri calendar:
   Era:        1
   Year:       1423
   Month:      1
   DayOfYear:  21
   DayOfMonth: 21
   DayOfWeek:  Wednesday

After adding two years and ten months:
   Era:        1
   Year:       1425
   Month:      11
   DayOfYear:  316
   DayOfMonth: 21
   DayOfWeek:  Saturday

*/

Windows 98, Windows 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 .NET Framework does not support all versions of every platform. For a list of the supported versions, see System Requirements.

.NET Framework

Supported in: 2.0

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