UmAlQuraCalendar.AddMonths(DateTime, Int32) 方法
定義
重要
部分資訊涉及發行前產品,在發行之前可能會有大幅修改。 Microsoft 對此處提供的資訊,不做任何明確或隱含的瑕疵擔保。
計算與指定初始日期相差指定月數的日期。
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
要在其中加入月份的日期。 UmAlQuraCalendar 類別只支援從 04/30/1900 00.00.00 (西曆日期) 到 11/16/2077 23:59:59 (西曆日期) 的日期。
- months
- Int32
要加入的正或負月數。
傳回
由 months
參數指定的月數加入至由 time
參數指定的日期所產生的日期。
例外狀況
產生的日期不在 UmAlQuraCalendar 類別支援的範圍內。
範例
下列範例會具現化 DateTime 值,並在 Um Al Qura 行事曆中顯示其數位元件的值。 接下來,它會呼叫 AddYears 和 AddMonths 方法,將 Um Al Qura 行事曆中的 2 年和 10 個月新增至日期值。 最後,它會再次在Um Al Qura行事曆中顯示這些日期元件的值。
using System;
using System.Globalization;
public class Example
{
public static void Main()
{
DateTime date1 = new DateTime(2011, 4, 3, new GregorianCalendar());
Calendar cal = new UmAlQuraCalendar();
Console.WriteLine("{0:MMMM d, yyyy} in the Gregorian calendar is equivalent to:", date1);
DisplayCalendarInfo(cal, date1);
// Add 2 years and 10 months by calling UmAlQuraCalendar methods.
date1 = cal.AddYears(date1, 2);
date1 = cal.AddMonths(date1, 10);
Console.WriteLine("After adding 2 years and 10 months in the {0} calendar,",
GetCalendarName(cal));
Console.WriteLine("{0:MMMM d, yyyy} in the Gregorian calendar is equivalent to:", date1);
DisplayCalendarInfo(cal, date1);
}
private static void DisplayCalendarInfo(Calendar cal, DateTime date1)
{
Console.WriteLine(" Calendar: {0}", GetCalendarName(cal));
Console.WriteLine(" Era: {0}", cal.GetEra(date1));
Console.WriteLine(" Year: {0}", cal.GetYear(date1));
Console.WriteLine(" Month: {0}", cal.GetMonth(date1));
Console.WriteLine(" DayOfYear: {0}", cal.GetDayOfYear(date1));
Console.WriteLine(" DayOfMonth: {0}", cal.GetDayOfMonth(date1));
Console.WriteLine(" DayOfWeek: {0}\n", cal.GetDayOfWeek(date1));
}
private static string GetCalendarName(Calendar cal)
{
return cal.ToString().Replace("System.Globalization.", "").
Replace("Calendar", "");
}
}
// The example displays the following output:
// April 3, 2011 in the Gregorian calendar is equivalent to:
// Calendar: UmAlQura
// Era: 1
// Year: 1432
// Month: 4
// DayOfYear: 118
// DayOfMonth: 29
// DayOfWeek: Sunday
//
// After adding 2 years and 10 months in the UmAlQura calendar,
// January 1, 2014 in the Gregorian calendar is equivalent to:
// Calendar: UmAlQura
// Era: 1
// Year: 1435
// Month: 2
// DayOfYear: 59
// DayOfMonth: 29
// DayOfWeek: Wednesday
Imports System.Globalization
Module Example
Public Sub Main()
Dim date1 As Date = New Date(2011, 4, 3, New GregorianCalendar())
Dim cal As New UmAlQuraCalendar()
Console.WriteLine("{0:MMMM d, yyyy} in the Gregorian calendar is equivalent to:", date1)
DisplayCalendarInfo(cal, date1)
' Add 2 years and 10 months by calling UmAlQuraCalendar methods.
date1 = cal.AddYears(date1, 2)
date1 = cal.AddMonths(date1, 10)
Console.WriteLine("After adding 2 years and 10 months in the {0} calendar,",
GetCalendarName(cal))
Console.WriteLine("{0:MMMM d, yyyy} in the Gregorian calendar is equivalent to:", date1)
DisplayCalendarInfo(cal, date1)
End Sub
Private Sub DisplayCalendarInfo(cal As Calendar, date1 As Date)
Console.WriteLine(" Calendar: {0}", GetCalendarName(cal))
Console.WriteLine(" Era: {0}", cal.GetEra(date1))
Console.WriteLine(" Year: {0}", cal.GetYear(date1))
Console.WriteLine(" Month: {0}", cal.GetMonth(date1))
Console.WriteLine(" DayOfYear: {0}", cal.GetDayOfYear(date1))
Console.WriteLine(" DayOfMonth: {0}", cal.GetDayOfMonth(date1))
Console.WriteLine(" DayOfWeek: {0}", cal.GetDayOfWeek(date1))
Console.WriteLine()
End Sub
Private Function GetCalendarName(cal As Calendar) As String
Return cal.ToString().Replace("System.Globalization.", "").
Replace("Calendar", "")
End Function
End Module
' The example displays the following output:
' April 3, 2011 in the Gregorian calendar is equivalent to:
' Calendar: UmAlQura
' Era: 1
' Year: 1432
' Month: 4
' DayOfYear: 118
' DayOfMonth: 29
' DayOfWeek: Sunday
'
' After adding 2 years and 10 months in the UmAlQura calendar,
' January 1, 2014 in the Gregorian calendar is equivalent to:
' Calendar: UmAlQura
' Era: 1
' Year: 1435
' Month: 2
' DayOfYear: 59
' DayOfMonth: 29
' DayOfWeek: Wednesday
備註
如果產生的日期不是所產生年份之月份的有效日期,則產生的日期部分 DateTime 會受到影響。 它變更為結果年份結果月份的最後一個有效日。 如果產生的 DateTime 月份超出指定的 DateTime年份,則產生的年份部分會受到影響。 此實作僅支援目前的紀元。 因此,如果產生的年份超出指定 DateTime之 的紀元,就會擲回例外狀況。 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 Zulkadah,其有 30 天,則指定的日期是該月份的第 30 天,而 參數的值 months
是 3,產生的年份是一個以上的指定年份,產生的月份是 Safar,而產生的日期是第 29 天,也就是 Safar 的最後一天。
如果參數的值是負數 months
,則產生的 DateTime 值早於指定的 DateTime。
傳KindDateTime回值的 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)