Calendar.GetWeekOfYear(DateTime, CalendarWeekRule, DayOfWeek) Methode

public:
 virtual int GetWeekOfYear(DateTime time, System::Globalization::CalendarWeekRule rule, DayOfWeek firstDayOfWeek);

public virtual int GetWeekOfYear (DateTime time, System.Globalization.CalendarWeekRule rule, DayOfWeek firstDayOfWeek);

abstract member GetWeekOfYear : DateTime * System.Globalization.CalendarWeekRule * DayOfWeek -> int
override this.GetWeekOfYear : DateTime * System.Globalization.CalendarWeekRule * DayOfWeek -> int

Public Overridable Function GetWeekOfYear (time As DateTime, rule As CalendarWeekRule, firstDayOfWeek As DayOfWeek) As Integer

Parameter

Gibt zurück

Int32

Eine positive ganze Zahl, die die Woche des Jahres darstellt, in die das im time-Parameter angegebene Datum fällt.A positive integer that represents the week of the year that includes the date in the time parameter.

Ausnahmen

Beispiele

Im folgenden Codebeispiel wird gezeigt, wie das Ergebnis von GetWeekOfYear in Abhängigkeit von FirstDayOfWeek und CalendarWeekRule verwendet wird.The following code example shows how the result of GetWeekOfYear varies depending on the FirstDayOfWeek and the CalendarWeekRule used. Wenn das angegebene Datum der letzte Tag des Jahres ist, wird GetWeekOfYear die Gesamtzahl der Wochen in diesem Jahr zurückgegeben.If the specified date is the last day of the year, GetWeekOfYear returns the total number of weeks in that year.

using namespace System;
using namespace System::Globalization;
int main()
{
   
   // Gets the Calendar instance associated with a CultureInfo.
   CultureInfo^ myCI = gcnew CultureInfo( "en-US" );
   Calendar^ myCal = myCI->Calendar;
   
   // Gets the DTFI properties required by GetWeekOfYear.
   CalendarWeekRule myCWR = myCI->DateTimeFormat->CalendarWeekRule;
   DayOfWeek myFirstDOW = myCI->DateTimeFormat->FirstDayOfWeek;
   
   // Displays the number of the current week relative to the beginning of the year.
   Console::WriteLine( "The CalendarWeekRule used for the en-US culture is {0}.", myCWR );
   Console::WriteLine( "The FirstDayOfWeek used for the en-US culture is {0}.", myFirstDOW );
   Console::WriteLine( "Therefore, the current week is Week {0} of the current year.", myCal->GetWeekOfYear( DateTime::Now, myCWR, myFirstDOW ) );
   
   // Displays the total number of weeks in the current year.
   DateTime LastDay = System::DateTime( DateTime::Now.Year, 12, 31 );
   Console::WriteLine( "There are {0} weeks in the current year ( {1}).", myCal->GetWeekOfYear( LastDay, myCWR, myFirstDOW ), LastDay.Year );
}

/*
This code produces the following output.  Results vary depending on the system date.

The CalendarWeekRule used for the en-US culture is FirstDay.
The FirstDayOfWeek used for the en-US culture is Sunday.
Therefore, the current week is Week 1 of the current year.
There are 53 weeks in the current year (2001).
*/

using System;
using System.Globalization;

public class SamplesCalendar  {

   public static void Main()  {

      // Gets the Calendar instance associated with a CultureInfo.
      CultureInfo myCI = new CultureInfo("en-US");
      Calendar myCal = myCI.Calendar;

      // Gets the DTFI properties required by GetWeekOfYear.
      CalendarWeekRule myCWR = myCI.DateTimeFormat.CalendarWeekRule;
      DayOfWeek myFirstDOW = myCI.DateTimeFormat.FirstDayOfWeek;

      // Displays the number of the current week relative to the beginning of the year.
      Console.WriteLine( "The CalendarWeekRule used for the en-US culture is {0}.", myCWR );
      Console.WriteLine( "The FirstDayOfWeek used for the en-US culture is {0}.", myFirstDOW );
      Console.WriteLine( "Therefore, the current week is Week {0} of the current year.", myCal.GetWeekOfYear( DateTime.Now, myCWR, myFirstDOW ));

      // Displays the total number of weeks in the current year.
      DateTime LastDay = new System.DateTime( DateTime.Now.Year, 12, 31 );
      Console.WriteLine( "There are {0} weeks in the current year ({1}).", myCal.GetWeekOfYear( LastDay, myCWR, myFirstDOW ), LastDay.Year );
   }
}

/*
This code produces the following output.  Results vary depending on the system date.

The CalendarWeekRule used for the en-US culture is FirstDay.
The FirstDayOfWeek used for the en-US culture is Sunday.
Therefore, the current week is Week 1 of the current year.
There are 53 weeks in the current year (2001).

*/

Imports System.Globalization

Public Class SamplesCalendar

   Public Shared Sub Main()
      
      ' Gets the Calendar instance associated with a CultureInfo.
      Dim myCI As New CultureInfo("en-US")
      Dim myCal As Calendar = myCI.Calendar
      
      ' Gets the DTFI properties required by GetWeekOfYear.
      Dim myCWR As CalendarWeekRule = myCI.DateTimeFormat.CalendarWeekRule
      Dim myFirstDOW As DayOfWeek = myCI.DateTimeFormat.FirstDayOfWeek
      
      ' Displays the number of the current week relative to the beginning of the year.
      Console.WriteLine("The CalendarWeekRule used for the en-US culture is {0}.", myCWR)
      Console.WriteLine("The FirstDayOfWeek used for the en-US culture is {0}.", myFirstDOW)
      Console.WriteLine("Therefore, the current week is Week {0} of the current year.", myCal.GetWeekOfYear(DateTime.Now, myCWR, myFirstDOW))
      
      ' Displays the total number of weeks in the current year.
      Dim LastDay = New System.DateTime(DateTime.Now.Year, 12, 31)
      Console.WriteLine("There are {0} weeks in the current year ({1}).", myCal.GetWeekOfYear(LastDay, myCWR, myFirstDOW), LastDay.Year)
   End Sub
End Class


'This code produces the following output.  Results vary depending on the system date.
'
'The CalendarWeekRule used for the en-US culture is FirstDay.
'The FirstDayOfWeek used for the en-US culture is Sunday.
'Therefore, the current week is Week 1 of the current year.
'There are 53 weeks in the current year (2001).

Hinweise

Diese Methode kann verwendet werden, um die Anzahl der Wochen im Jahr zu ermitteln time , indem auf den letzten Tag des Jahres festgelegt wird.This method can be used to determine the number of weeks in the year by setting time to the last day of the year.

Das DateTimeFormatInfo -Objekt für eine bestimmte Kultur, die den von der-Eigenschaft angegebenen Kalender verwendet, DateTimeFormatInfo.Calendar enthält die folgenden Kultur abhängigen Werte, die für den rule -Parameter und den-Parameter verwendet werden können firstDayOfWeek :The DateTimeFormatInfo object for a particular culture that uses the calendar indicated by the DateTimeFormatInfo.Calendar property includes the following culture-specific values that can be used for the rule and firstDayOfWeek parameters:

• Die- DateTimeFormatInfo.FirstDayOfWeek Eigenschaft enthält den ersten Tag der Woche, der für den-Parameter verwendet werden kann firstDayOfWeek .The DateTimeFormatInfo.FirstDayOfWeek property contains the default first day of the week that can be used for the firstDayOfWeek parameter.

• Die- DateTimeFormatInfo.CalendarWeekRule Eigenschaft enthält die standardmäßige Kalenderwochen Regel, die für den-Parameter verwendet werden kann rule .The DateTimeFormatInfo.CalendarWeekRule property contains the default calendar week rule that can be used for the rule parameter.

Im folgenden Beispiel wird das-Objekt der aktuellen Kultur verwendet DateTimeFormatInfo , um zu bestimmen, ob der 1. Januar 2011 in der ersten Woche des Jahres im gregorianischen Kalender liegt.The following example uses the current culture's DateTimeFormatInfo object to determine that January 1, 2011 is in the first week of the year in the Gregorian calendar.

using System;
using System.Globalization;

public class Example
{
   public static void Main()
   {
      DateTimeFormatInfo dfi = DateTimeFormatInfo.CurrentInfo;
      DateTime date1 = new DateTime(2011, 1, 1);
      Calendar cal = dfi.Calendar;

      Console.WriteLine("{0:d}: Week {1} ({2})", date1,
                        cal.GetWeekOfYear(date1, dfi.CalendarWeekRule,
                                          dfi.FirstDayOfWeek),
                        cal.ToString().Substring(cal.ToString().LastIndexOf(".") + 1));
   }
}
// The example displays the following output:
//       1/1/2011: Week 1 (GregorianCalendar)

Imports System.Globalization

Module Example
   Public Sub Main()
      Dim dfi As DateTimeFormatInfo = DateTimeFormatInfo.CurrentInfo
      Dim date1 As Date = #1/1/2011#
      Dim cal As Calendar = dfi.Calendar
      
      Console.WriteLine("{0:d}: Week {1} ({2})", date1, 
                        cal.GetWeekOfYear(date1, dfi.CalendarWeekRule, 
                                          dfi.FirstDayOfWeek),
                        cal.ToString().Substring(cal.ToString().LastIndexOf(".") + 1))       
   End Sub
End Module
' The example displays the following output:
'       1/1/2011: Week 1 (GregorianCalendar)

Für einige Kalender löst ein Aufrufe der GetWeekOfYear -Methode eine ArgumentOutOfRangeException für bestimmte Kombinationen von rule -und firstDayOfWeek -Werten aus, auch wenn time größer ist als das von der-Eigenschaft dieses Kalenders zurückgegebene Datum MinSupportedDateTime .For some calendars, a call to the GetWeekOfYear method throws an ArgumentOutOfRangeException for particular combinations of rule and firstDayOfWeek values even if time is greater than the date returned by that calendar's MinSupportedDateTime property. In der folgenden Tabelle sind die betroffenen Kalender, die spezifischen rule Werte und der Bereich der frühesten unterstützten time Werte aufgeführt.The following table lists the affected calendars, the specific rule values, and the range of the earliest supported time values. Der spezifische minimal DateTime Wert hängt vom Wert des- firstDayOfWeek Parameters ab.The specific minimum DateTime value depends on the value of the firstDayOfWeek parameter.

KalenderCalendar	CalendarWeekRule-WertCalendarWeekRule value	Gregorianisches Datum (M/dd/yyyy)Gregorian date (M/dd/yyyy)	Datum im Kalender (M/dd/yyyy)Date in calendar (M/dd/yyyy)
ChineseLunisolarCalendar	FirstFullWeek	2/19/1901 bis 2/25/19012/19/1901 to 2/25/1901	1/1/1901 bis 1/7/19011/1/1901 to 1/7/1901
ChineseLunisolarCalendar	FirstFourDayWeek	2/19/1901 bis 2/22/19012/19/1901 to 2/22/1901	1/01/1901 bis 1/04/19011/01/1901 to 1/04/1901
HebrewCalendar	FirstDay	9/17/15839/17/1583	1/01/53441/01/5344
HebrewCalendar	FirstFullWeek	9/17/1583 bis 9/23/15839/17/1583 to 9/23/1583	1/01/5344 bis 1/07/53441/01/5344 to 1/07/5344
HebrewCalendar	FirstFourDayWeek	9/17/1583 bis 9/20/15839/17/1583 to 9/20/1583	1/01/5344 bis 1/04/53441/01/5344 to 1/04/5344
HijriCalendar	FirstFullWeek	7/18/0622 bis 7/24/06227/18/0622 to 7/24/0622	1/01/0001 bis 1/07/00011/01/0001 to 1/07/0001
HijriCalendar	FirstFourDayWeek	7/18/0622 bis 7/21/06227/18/0622 to 7/21/0622	1/01/0001 bis 1/04/00011/01/0001 to 1/04/0001
JapaneseLunisolarCalendar	FirstFullWeek	1/28/1960 bis 2/03/19601/28/1960 to 2/03/1960	1/01/35 bis 1/07/00351/01/35 to 1/07/0035
JapaneseLunisolarCalendar	FirstFourDayWeek	1/28/1960 bis 1/31/19601/28/1960 to 1/31/1960	1/01/0035 bis 1/04/00351/01/0035 to 1/04/0035
JulianCalendar	FirstFullWeek	1/01/0001 bis 1/05/00011/01/0001 to 1/05/0001	1/03/0001 bis 1/07/00011/03/0001 to 1/07/0001
JulianCalendar	FirstFourDayWeek	1/01/0001 bis 1/02/00011/01/0001 to 1/02/0001	1/03/0001 bis 1/04/00011/03/0001 to 1/04/0001
KoreanLunisolarCalendar	FirstFullWeek	2/14/0918 bis 2/20/09182/14/0918 to 2/20/0918	1/01/0918 bis 1/07/09181/01/0918 to 1/07/0918
KoreanLunisolarCalendar	FirstFourDayWeek	2/14/0918 bis 2/17/09182/14/0918 to 2/17/0918	1/01/0918 bis 1/04/09181/01/0918 to 1/04/0918
PersianCalendar	FirstFullWeek	3/21/0622 bis 3/27/06223/21/0622 to 3/27/0622	1/01/0001 bis 1/07/00011/01/0001 to 1/07/0001
PersianCalendar	FirstFourDayWeek	3/21/0622 bis 3/24/06223/21/0622 to 3/24/0622	1/01/0001 bis 1/04/00011/01/0001 to 1/04/0001
TaiwanLunisolarCalendar	FirstFullWeek	2/18/1912 bis 2/24/19122/18/1912 to 2/24/1912	1/01/0001 bis 1/07/00011/01/0001 to 1/07/0001
TaiwanLunisolarCalendar	FirstFourDayWeek	2/18/1912 bis 2/21/19122/18/1912 to 2/21/1912	1/01/0001 bis 1/04/00011/01/0001 to 1/04/0001
UmAlQuraCalendar	FirstFullWeek	4/30/1900 bis 5/06/19004/30/1900 to 5/06/1900	1/01/1318 bis 1/07/13181/01/1318 to 1/07/1318
UmAlQuraCalendar	FirstFourDayWeek	4/30/1900 bis 5/03/19004/30/1900 to 5/03/1900	1/01/1318 bis 1/04/13181/01/1318 to 1/04/1318

Gilt für:

Siehe auch

• DateTime
• CalendarWeekRule
• DayOfWeek
• GetEra(DateTime)
• GetYear(DateTime)
• GetMonth(DateTime)
• GetDayOfYear(DateTime)
• GetDayOfMonth(DateTime)
• GetDayOfWeek(DateTime)
• GetHour(DateTime)
• GetMinute(DateTime)
• GetSecond(DateTime)
• GetMilliseconds(DateTime)