Calendar.GetWeekOfYear(DateTime, CalendarWeekRule, DayOfWeek) Calendar.GetWeekOfYear(DateTime, CalendarWeekRule, DayOfWeek) Calendar.GetWeekOfYear(DateTime, CalendarWeekRule, DayOfWeek) Calendar.GetWeekOfYear(DateTime, CalendarWeekRule, DayOfWeek) Method

Definition

Gibt die Woche des Jahrs zurück, in die das Datum im angegebenen DateTime-Wert fällt.Returns the week of the year that includes the date in the specified DateTime value.

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

time
DateTime DateTime DateTime DateTime

Ein Datums- und Uhrzeitwert.A date and time value.

rule
CalendarWeekRule CalendarWeekRule CalendarWeekRule CalendarWeekRule

Ein Enumerationswert, der eine Kalenderwoche definiert.An enumeration value that defines a calendar week.

firstDayOfWeek
DayOfWeek DayOfWeek DayOfWeek DayOfWeek

Ein Enumerationswert, der den ersten Tag der Woche darstellt.An enumeration value that represents the first day of the week.

Gibt zurück

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

time ist früher als MinSupportedDateTime oder später als MaxSupportedDateTime.time is earlier than MinSupportedDateTime or later than MaxSupportedDateTime.

- oder --or- firstDayOfWeek ist kein gültiger DayOfWeek -Wert.firstDayOfWeek is not a valid DayOfWeek value.

- oder --or- rule ist kein gültiger CalendarWeekRule-Wert.rule is not a valid CalendarWeekRule value.

Beispiele

Im folgenden Codebeispiel GetWeekOfYear CalendarWeekRule wird gezeigt, wie das Ergebnis von FirstDayOfWeek in Abhängigkeit von und 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, GetWeekOfYear wird 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 DateTimeFormatInfo.Calendar -Eigenschaft angegebenen Kalender verwendet, enthält die folgenden Kultur abhängigen Werte, die für rule den firstDayOfWeek -Parameter und den-Parameter verwendet werden können: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:

Im folgenden Beispiel wird das- DateTimeFormatInfo Objekt der aktuellen Kultur verwendet, 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 GetWeekOfYear Aufrufe der-Methode eine ArgumentOutOfRangeException für bestimmte Kombinationen von rule - firstDayOfWeek und-Werten time aus, auch wenn größer ist als das von der MinSupportedDateTime -Eigenschaft dieses Kalenders zurückgegebene Datum.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 rule spezifischen 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 firstDayOfWeek des-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