ThaiBuddhistCalendar.AddMonths(DateTime, Int32) 方法

定义

命名空间:

System.Globalization

程序集:

System.Runtime.dll

Source:

ThaiBuddhistCalendar.cs

返回与指定 DateTime 相距指定月数的 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

参数

time

DateTime

将向其添加月数的 DateTime。

months

Int32

要添加的月数。

返回

DateTime

将指定月数添加到指定的 DateTime 中时得到的 DateTime。

例外

ArgumentException

生成的 DateTime 超出了支持的范围。

ArgumentOutOfRangeException

months 小于 -120000。

- 或 -

months 大于 120000。

示例

下面的示例演示 AddMonths 方法的用法。

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 ThaiBuddhistCalendar.
   ThaiBuddhistCalendar^ myCal = gcnew ThaiBuddhistCalendar;
   
   // Displays the values of the DateTime.
   Console::WriteLine( "April 3, 2002 of the Gregorian calendar equals the following in the ThaiBuddhist 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 ThaiBuddhist calendar:
   Era:        1
   Year:       2545
   Month:      4
   DayOfYear:  93
   DayOfMonth: 3
   DayOfWeek:  Wednesday

After adding two years and ten months:
   Era:        1
   Year:       2548
   Month:      2
   DayOfYear:  34
   DayOfMonth: 3
   DayOfWeek:  Thursday

*/

using System;
using System.Globalization;

public class SamplesThaiBuddhistCalendar  {

   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 ThaiBuddhistCalendar.
      ThaiBuddhistCalendar myCal = new ThaiBuddhistCalendar();

      // Displays the values of the DateTime.
      Console.WriteLine( "April 3, 2002 of the Gregorian calendar equals the following in the ThaiBuddhist 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 ThaiBuddhist calendar:
   Era:        1
   Year:       2545
   Month:      4
   DayOfYear:  93
   DayOfMonth: 3
   DayOfWeek:  Wednesday

After adding two years and ten months:
   Era:        1
   Year:       2548
   Month:      2
   DayOfYear:  34
   DayOfMonth: 3
   DayOfWeek:  Thursday

*/

Imports System.Globalization


Public Class SamplesThaiBuddhistCalendar   

   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 ThaiBuddhistCalendar.
      Dim myCal As New ThaiBuddhistCalendar()

      ' Displays the values of the DateTime.
      Console.WriteLine("April 3, 2002 of the Gregorian calendar equals the following in the ThaiBuddhist 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 ThaiBuddhist calendar:
'   Era:        1
'   Year:       2545
'   Month:      4
'   DayOfYear:  93
'   DayOfMonth: 3
'   DayOfWeek:  Wednesday
'
'After adding two years and ten months:
'   Era:        1
'   Year:       2548
'   Month:      2
'   DayOfYear:  34
'   DayOfMonth: 3
'   DayOfWeek:  Thursday

注解

如果生成的日期不是结果 DateTime 年份的月中的有效日期，则结果的日期部分将受到影响。 它更改为结果年份中结果月份的最后一个有效日期。 如果生成的月份在指定的 DateTime年份之外，则生成的DateTime年份部分将受到影响。 此实现仅支持当前时代。 因此， ArgumentException 如果生成的年份在指定的 DateTime的纪元之外，则引发 。 生成的 DateTime 的一天中的时间部分与指定的 DateTime保持相同。

例如，如果指定的月份是 10 月，它有 31 天，指定的日期是该月的第 31 天，参数的 months 值为 6，则生成的年份比指定年份多一，生成的月份是 4 月，生成的日期是 4 月的第 30 天，即 4 月的最后一天。

如果 参数的 months 值为负，则生成的 DateTime 早于指定的 DateTime。

Kind返回DateTime的值的 属性始终等于 DateTimeKind.Unspecified。 可以通过调用 DateTime.SpecifyKind 方法保留 Kind 参数的 time 属性，如以下示例所示。

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

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

另请参阅

• DateTime
• AddYears(DateTime, Int32)