JapaneseCalendar.AddMonths(DateTime, Int32) 方法

定義

命名空間:

System.Globalization

組件:

System.Runtime.dll

來源:

JapaneseCalendar.cs

傳回與指定 DateTime 相差指定月數的 DateTime。

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

參數

time

DateTime

要將月份加入的 DateTime。

months

Int32

要新增的月數。

傳回

DateTime

DateTime，由將指定的月數加入指定的 DateTime 所產生。

例外狀況

ArgumentException

產生的 DateTime 在支援的範圍之外。

ArgumentOutOfRangeException

months 小於 -120000。

-或-

months 大於 120000。

範例

下列程式碼範例會根據日曆顯示 的數個 DateTime 元件值。

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 JapaneseCalendar.
   JapaneseCalendar^ myCal = gcnew JapaneseCalendar;
   
   // Displays the values of the DateTime.
   Console::WriteLine( "April 3, 2002 of the Gregorian calendar equals the following in the Japanese 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 Japanese calendar:
   Era:        4
   Year:       14
   Month:      4
   DayOfYear:  93
   DayOfMonth: 3
   DayOfWeek:  Wednesday

After adding two years and ten months:
   Era:        4
   Year:       17
   Month:      2
   DayOfYear:  34
   DayOfMonth: 3
   DayOfWeek:  Thursday

*/

using System;
using System.Globalization;

public class SamplesJapaneseCalendar  {

   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 JapaneseCalendar.
      JapaneseCalendar myCal = new JapaneseCalendar();

      // Displays the values of the DateTime.
      Console.WriteLine( "April 3, 2002 of the Gregorian calendar equals the following in the Japanese 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 Japanese calendar:
   Era:        4
   Year:       14
   Month:      4
   DayOfYear:  93
   DayOfMonth: 3
   DayOfWeek:  Wednesday

After adding two years and ten months:
   Era:        4
   Year:       17
   Month:      2
   DayOfYear:  34
   DayOfMonth: 3
   DayOfWeek:  Thursday

*/

Imports System.Globalization


Public Class SamplesJapaneseCalendar   

   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 JapaneseCalendar.
      Dim myCal As New JapaneseCalendar()

      ' Displays the values of the DateTime.
      Console.WriteLine("April 3, 2002 of the Gregorian calendar equals the following in the Japanese 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 Japanese calendar:
'   Era:        4
'   Year:       14
'   Month:      4
'   DayOfYear:  93
'   DayOfMonth: 3
'   DayOfWeek:  Wednesday
'
'After adding two years and ten months:
'   Era:        4
'   Year:       17
'   Month:      2
'   DayOfYear:  34
'   DayOfMonth: 3
'   DayOfWeek:  Thursday

備註

如果產生的日期不是結果年份結果月份的有效日期，則產生的 DateTime 日期部分會受到影響。 它會變更為結果年份結果月份的最後一個有效日。 如果產生的月份超出指定的 DateTime 年份，則產生的 DateTime 年份部分會受到影響。 如果產生的年份超出指定的 DateTime 紀元，則產生的 DateTime 紀元部分會受到影響。 結果 DateTime 的當日時間部分會維持與指定的 DateTime 相同。

例如，如果指定的月份是 Juugatsu (10 月) ，其有 31 天，則指定的日期是該月份的第 31 天，而 months 為 6，則產生的年份會超過指定的年份，產生的月份會是 Shigatsu (4 月) ，而產生的日期是第 30 天，也就是 Shigatsu (4 月) 。

如果 months 為負數，則產生的 DateTime 會早于指定的 DateTime 。

傳 Kind 回 DateTime 值的 屬性一律等於 DateTimeKind.Unspecified 。 您可以呼叫 DateTime.SpecifyKind 方法來保留 Kind 參數的 time 屬性，如下列範例所示。

returnTime = DateTime.SpecifyKind(cal.AddMonths(time, months), time.Kind);

returnTime = DateTime.SpecifyKind(cal.AddMonths(time, months), time.Kind)

另請參閱

• DateTime
• AddYears(DateTime, Int32)
• AddWeeks(DateTime, Int32)
• AddDays(DateTime, Int32)
• AddHours(DateTime, Int32)
• AddMinutes(DateTime, Int32)
• AddSeconds(DateTime, Int32)
• AddMilliseconds(DateTime, Double)