JulianCalendar.AddMonths(DateTime, Int32) Método
Definição
public:
override DateTime AddMonths(DateTime time, int months);
public override DateTime AddMonths (DateTime time, int months);
override this.AddMonths : DateTime * int -> DateTime
Public Overrides Function AddMonths (time As DateTime, months As Integer) As DateTime
Parâmetros
- months
- Int32
O número de meses a serem adicionados.The number of months to add.
Retornos
O DateTime resultante da adição do número especificado de meses ao DateTime especificado.The DateTime that results from adding the specified number of months to the specified DateTime.
Exceções
O resultante DateTime está fora do intervalo com suporte.The resulting DateTime is outside the supported range.
months é menor que -120.000.months is less than -120000.
- ou --or-
months é maior que 120.000.months is greater than 120000.
Exemplos
O exemplo de código a seguir exibe os valores de vários componentes de um DateTime em termos do calendário juliano.The following code example displays the values of several components of a DateTime in terms of the Julian calendar.
using namespace System;
using namespace System::Globalization;
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();
}
int main()
{
// Sets a DateTime to April 3, 2002 of the Gregorian calendar.
DateTime myDT = DateTime(2002,4,3,gcnew GregorianCalendar);
// Creates an instance of the JulianCalendar.
JulianCalendar^ myCal = gcnew JulianCalendar;
// Displays the values of the DateTime.
Console::WriteLine( "April 3, 2002 of the Gregorian calendar equals the following in the Julian 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 );
}
/*
This code produces the following output.
April 3, 2002 of the Gregorian calendar equals the following in the Julian calendar:
Era: 1
Year: 2002
Month: 3
DayOfYear: 80
DayOfMonth: 21
DayOfWeek: Wednesday
After adding two years and ten months:
Era: 1
Year: 2005
Month: 1
DayOfYear: 21
DayOfMonth: 21
DayOfWeek: Thursday
*/
using System;
using System.Globalization;
public class SamplesJulianCalendar {
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 JulianCalendar.
JulianCalendar myCal = new JulianCalendar();
// Displays the values of the DateTime.
Console.WriteLine( "April 3, 2002 of the Gregorian calendar equals the following in the Julian 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 Julian calendar:
Era: 1
Year: 2002
Month: 3
DayOfYear: 80
DayOfMonth: 21
DayOfWeek: Wednesday
After adding two years and ten months:
Era: 1
Year: 2005
Month: 1
DayOfYear: 21
DayOfMonth: 21
DayOfWeek: Thursday
*/
Imports System.Globalization
Public Class SamplesJulianCalendar
Public Shared Sub Main()
' Sets a DateTime to April 3, 2002 of the Gregorian calendar.
Dim myDT As New DateTime(2002, 4, 3, New GregorianCalendar())
' Creates an instance of the JulianCalendar.
Dim myCal As New JulianCalendar()
' Displays the values of the DateTime.
Console.WriteLine("April 3, 2002 of the Gregorian calendar equals the following in the Julian 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)
End Sub
Public Shared Sub DisplayValues(myCal As Calendar, myDT As DateTime)
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()
End Sub
End Class
'This code produces the following output.
'
'April 3, 2002 of the Gregorian calendar equals the following in the Julian calendar:
' Era: 1
' Year: 2002
' Month: 3
' DayOfYear: 80
' DayOfMonth: 21
' DayOfWeek: Wednesday
'
'After adding two years and ten months:
' Era: 1
' Year: 2005
' Month: 1
' DayOfYear: 21
' DayOfMonth: 21
' DayOfWeek: Thursday
Comentários
A parte do dia do resultado DateTime será afetada se o dia resultante não for um dia válido no mês resultante do ano resultante.The day part of the resulting DateTime is affected if the resulting day is not a valid day in the resulting month of the resulting year. Ele é alterado para o último dia válido no mês resultante do ano resultante.It is changed to the last valid day in the resulting month of the resulting year. A parte do ano do resultado DateTime será afetada se o mês resultante estiver fora do ano especificado DateTime .The year part of the resulting DateTime is affected if the resulting month is outside the year of the specified DateTime. Essa implementação dá suporte apenas à era atual.This implementation supports only the current era. Portanto, ArgumentException será gerado se o ano resultante estiver fora da era do especificado DateTime .Therefore, ArgumentException is thrown if the resulting year is outside the era of the specified DateTime. A parte de hora do dia do resultado DateTime permanece a mesma que a especificada DateTime .The time-of-day part of the resulting DateTime remains the same as the specified DateTime.
Por exemplo, se o mês especificado for de outubro, que tem 31 dias, o dia especificado é o dia 31 desse mês e o valor do months parâmetro é 6, o ano resultante é um maior que o ano especificado, o mês resultante é de abril e o dia resultante é o dia 30, que é o último dia em abril.For example, if the specified month is October, which has 31 days, the specified day is the 31st day of that month, and the value of the months parameter is 6, the resulting year is one more than the specified year, the resulting month is April, and the resulting day is the 30th day, which is the last day in April.
Se o valor do months parâmetro for negativo, o resultado DateTime será anterior ao especificado DateTime .If the value of the months parameter is negative, the resulting DateTime is earlier than the specified DateTime.
A Kind Propriedade do valor retornado DateTime sempre é igual a DateTimeKind.Unspecified .The Kind property of the returned DateTime value always equals DateTimeKind.Unspecified. Você pode preservar a Kind Propriedade do time parâmetro chamando o DateTime.SpecifyKind método, como mostra o exemplo a seguir.You can preserve the Kind property of the time parameter by calling the DateTime.SpecifyKind method, as the following example shows.
returnTime = DateTime.SpecifyKind(cal.AddMonths(time, months), time.Kind);
returnTime = DateTime.SpecifyKind(cal.AddMonths(time, months), time.Kind)