Calendar.AddMonths(DateTime, Int32) Método
Definição
public:
abstract DateTime AddMonths(DateTime time, int months);
public abstract DateTime AddMonths (DateTime time, int months);
abstract member AddMonths : DateTime * int -> DateTime
Public MustOverride 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 DateTime resultante está fora do intervalo com suporte deste calendário.The resulting DateTime is outside the supported range of this calendar.
months está fora do intervalo com suporte do valor retornado de DateTime.months is outside the supported range of the DateTime return value.
Exemplos
O exemplo de código a seguir demonstra os membros da Calendar classe.The following code example demonstrates the members of the Calendar class.
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( " Hour: {0}", myCal->GetHour( myDT ) );
Console::WriteLine( " Minute: {0}", myCal->GetMinute( myDT ) );
Console::WriteLine( " Second: {0}", myCal->GetSecond( myDT ) );
Console::WriteLine( " Milliseconds: {0}", myCal->GetMilliseconds( myDT ) );
Console::WriteLine();
}
int main()
{
// Sets a DateTime to April 3, 2002 of the Gregorian calendar.
DateTime myDT = DateTime(2002,4,3,gcnew GregorianCalendar);
// Uses the default calendar of the InvariantCulture.
Calendar^ myCal = CultureInfo::InvariantCulture->Calendar;
// Displays the values of the DateTime.
Console::WriteLine( "April 3, 2002 of the Gregorian calendar:" );
DisplayValues( myCal, myDT );
// Adds 5 to every component of the DateTime.
myDT = myCal->AddYears( myDT, 5 );
myDT = myCal->AddMonths( myDT, 5 );
myDT = myCal->AddWeeks( myDT, 5 );
myDT = myCal->AddDays( myDT, 5 );
myDT = myCal->AddHours( myDT, 5 );
myDT = myCal->AddMinutes( myDT, 5 );
myDT = myCal->AddSeconds( myDT, 5 );
myDT = myCal->AddMilliseconds( myDT, 5 );
// Displays the values of the DateTime.
Console::WriteLine( "After adding 5 to each component of the DateTime:" );
DisplayValues( myCal, myDT );
}
/*
This code produces the following output.
April 3, 2002 of the Gregorian calendar:
Era: 1
Year: 2002
Month: 4
DayOfYear: 93
DayOfMonth: 3
DayOfWeek: Wednesday
Hour: 0
Minute: 0
Second: 0
Milliseconds: 0
After adding 5 to each component of the DateTime:
Era: 1
Year: 2007
Month: 10
DayOfYear: 286
DayOfMonth: 13
DayOfWeek: Saturday
Hour: 5
Minute: 5
Second: 5
Milliseconds: 5
*/
using System;
using System.Globalization;
public class SamplesCalendar {
public static void Main() {
// Sets a DateTime to April 3, 2002 of the Gregorian calendar.
DateTime myDT = new DateTime( 2002, 4, 3, new GregorianCalendar() );
// Uses the default calendar of the InvariantCulture.
Calendar myCal = CultureInfo.InvariantCulture.Calendar;
// Displays the values of the DateTime.
Console.WriteLine( "April 3, 2002 of the Gregorian calendar:" );
DisplayValues( myCal, myDT );
// Adds 5 to every component of the DateTime.
myDT = myCal.AddYears( myDT, 5 );
myDT = myCal.AddMonths( myDT, 5 );
myDT = myCal.AddWeeks( myDT, 5 );
myDT = myCal.AddDays( myDT, 5 );
myDT = myCal.AddHours( myDT, 5 );
myDT = myCal.AddMinutes( myDT, 5 );
myDT = myCal.AddSeconds( myDT, 5 );
myDT = myCal.AddMilliseconds( myDT, 5 );
// Displays the values of the DateTime.
Console.WriteLine( "After adding 5 to each component of the DateTime:" );
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( " Hour: {0}", myCal.GetHour( myDT ) );
Console.WriteLine( " Minute: {0}", myCal.GetMinute( myDT ) );
Console.WriteLine( " Second: {0}", myCal.GetSecond( myDT ) );
Console.WriteLine( " Milliseconds: {0}", myCal.GetMilliseconds( myDT ) );
Console.WriteLine();
}
}
/*
This code produces the following output.
April 3, 2002 of the Gregorian calendar:
Era: 1
Year: 2002
Month: 4
DayOfYear: 93
DayOfMonth: 3
DayOfWeek: Wednesday
Hour: 0
Minute: 0
Second: 0
Milliseconds: 0
After adding 5 to each component of the DateTime:
Era: 1
Year: 2007
Month: 10
DayOfYear: 286
DayOfMonth: 13
DayOfWeek: Saturday
Hour: 5
Minute: 5
Second: 5
Milliseconds: 5
*/
Imports System.Globalization
Public Class SamplesCalendar
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())
' Uses the default calendar of the InvariantCulture.
Dim myCal As Calendar = CultureInfo.InvariantCulture.Calendar
' Displays the values of the DateTime.
Console.WriteLine("April 3, 2002 of the Gregorian calendar:")
DisplayValues(myCal, myDT)
' Adds 5 to every component of the DateTime.
myDT = myCal.AddYears(myDT, 5)
myDT = myCal.AddMonths(myDT, 5)
myDT = myCal.AddWeeks(myDT, 5)
myDT = myCal.AddDays(myDT, 5)
myDT = myCal.AddHours(myDT, 5)
myDT = myCal.AddMinutes(myDT, 5)
myDT = myCal.AddSeconds(myDT, 5)
myDT = myCal.AddMilliseconds(myDT, 5)
' Displays the values of the DateTime.
Console.WriteLine("After adding 5 to each component of the DateTime:")
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(" Hour: {0}", myCal.GetHour(myDT))
Console.WriteLine(" Minute: {0}", myCal.GetMinute(myDT))
Console.WriteLine(" Second: {0}", myCal.GetSecond(myDT))
Console.WriteLine(" Milliseconds: {0}", myCal.GetMilliseconds(myDT))
Console.WriteLine()
End Sub
End Class
'This code produces the following output.
'
'April 3, 2002 of the Gregorian calendar:
' Era: 1
' Year: 2002
' Month: 4
' DayOfYear: 93
' DayOfMonth: 3
' DayOfWeek: Wednesday
' Hour: 0
' Minute: 0
' Second: 0
' Milliseconds: 0
'
'After adding 5 to each component of the DateTime:
' Era: 1
' Year: 2007
' Month: 10
' DayOfYear: 286
' DayOfMonth: 13
' DayOfWeek: Saturday
' Hour: 5
' Minute: 5
' Second: 5
' Milliseconds: 5
Comentários
O months valor é adicionado ao especificado DateTime .The months value is added to the specified DateTime. Se months for negativo, o resultado DateTime será anterior ao especificado DateTime .If months is negative, the resulting DateTime is earlier than the specified DateTime.
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. A parte era do resultado DateTime será afetada se o ano resultante estiver fora da era do especificado DateTime .The era part of the resulting DateTime is affected 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, suponha que o calendário atual tenha 12 meses, em que o quarto mês tem 30 dias e o décimo mês tem 31 dias.For example, suppose that the current calendar has 12 months, where the fourth month has 30 days and the tenth month has 31 days. Se o mês especificado for o décimo mês, 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 o quarto mês e o dia resultante é o dia 30, que é o último dia do mês resultante.If the specified month is the tenth month, 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 the fourth month, and the resulting day is the 30th day, which is the last day of the resulting month.
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)