Calendar.GetWeekOfYear(DateTime, CalendarWeekRule, DayOfWeek) Yöntem

Tanım

Ad Alanı:

System.Globalization

Bütünleştirilmiş Kod:

System.Runtime.dll

Kaynak:

Calendar.cs

Belirtilen DateTime değerdeki tarihi içeren yılın haftasını döndürür.

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

Parametreler

time

DateTime

Tarih ve saat değeri.

rule

CalendarWeekRule

Takvim haftası tanımlayan bir numaralandırma değeri.

firstDayOfWeek

DayOfWeek

Haftanın ilk gününü temsil eden bir numaralandırma değeri.

Döndürülenler

Int32

parametresinde tarihi time içeren yılın haftasını temsil eden pozitif bir tamsayı.

Özel durumlar

ArgumentOutOfRangeException

time , değerinden önceki MinSupportedDateTime veya sonraki bir sürümdür MaxSupportedDateTime.

-veya-

firstDayOfWeek geçerli DayOfWeek bir değer değil.

-veya-

rule geçerli CalendarWeekRule bir değer değil.

Örnekler

Aşağıdaki kod örneği, sonucunun GetWeekOfYear kullanılan ve CalendarWeekRule öğesine bağlı FirstDayOfWeek olarak nasıl değiştiğini gösterir. Belirtilen tarih yılın son günüyse, GetWeekOfYear o yıldaki toplam hafta sayısını döndürür.

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).

Açıklamalar

Bu yöntem, yılın son gününe ayarlanarak time yıl içindeki hafta sayısını belirlemek için kullanılabilir.

DateTimeFormatInfo özelliği tarafından belirtilen takvimi kullanan belirli bir kültürün DateTimeFormatInfo.Calendar nesnesi, ve firstDayOfWeek parametreleri için rule kullanılabilecek kültüre özgü aşağıdaki değerleri içerir:

• özelliği, DateTimeFormatInfo.FirstDayOfWeek parametresi için firstDayOfWeek kullanılabilecek varsayılan haftanın ilk gününü içerir.

• özelliği, DateTimeFormatInfo.CalendarWeekRule parametresi için kullanılabilecek varsayılan takvim haftası rule kuralını içerir.

Not

Bu, ISO 8601 ile tam olarak eşlenmez. Farklılıklar , Microsoft .NET'teki ISO 8601 Yılın Haftası biçiminde blog girdisinde ele alınmaktadır. .NET Core 3.0'dan ISOWeek.GetYearISOWeek.GetWeekOfYear başlayarak bu sorunu çözün.

Aşağıdaki örnek, 1 Ocak 2011'in DateTimeFormatInfo Gregoryen takvimde yılın ilk haftasında olduğunu belirlemek için geçerli kültürün nesnesini kullanır.

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)

Bazı takvimler için yöntemine yapılan GetWeekOfYear bir çağrı, takvimin firstDayOfWeekruleMinSupportedDateTime özelliği tarafından döndürülen tarihten büyük olsa time bile ve değerlerinin belirli birleşimleri için bir ArgumentOutOfRangeException oluşturur. Aşağıdaki tabloda etkilenen takvimler, belirli rule değerler ve desteklenen time en erken değerlerin aralığı listelenmektedir. Belirli bir minimum DateTime değer parametresinin firstDayOfWeek değerine bağlıdır.

Takvim	CalendarWeekRule değeri	Gregoryen tarih (M/dd/yyyy)	Takvimdeki tarih (M/dd/yyyy)
ChineseLunisolarCalendar	FirstFullWeek	19.02.1901 - 25.02.1901	1/1/1901 - 7/1/1901
ChineseLunisolarCalendar	FirstFourDayWeek	19.02.1901 - 22.02.1901	01.01.1901 - 04.01.1901
HebrewCalendar	FirstDay	9/17/1583	1/01/5344
HebrewCalendar	FirstFullWeek	17/9/1583 - 23/9/1583	01.01.5344 - 07.01.5344
HebrewCalendar	FirstFourDayWeek	17/9/1583 - 20/9/1583	01.01.5344 - 04.01.5344
HijriCalendar	FirstFullWeek	18.07.0622 - 24.07.0622	01.01.0001 - 07.01.0001
HijriCalendar	FirstFourDayWeek	18.07.0622 - 21.07.0622	01.01.0001 - 04.01.0001
JapaneseLunisolarCalendar	FirstFullWeek	28.1.1960 - 03.02.1960	01.01.35 - 07.01.0035
JapaneseLunisolarCalendar	FirstFourDayWeek	28.1.1960 - 31.01.1960	01.01.0035 - 04.01.0035
JulianCalendar	FirstFullWeek	01.01.0001 - 05.01.0001	03.03.0001 - 07.01.0001
JulianCalendar	FirstFourDayWeek	01.01.0001 - 02.01.0001	03.03.0001 - 04.01.0001
KoreanLunisolarCalendar	FirstFullWeek	14.02.0918 - 20.02.0918	01.01.0918 - 07.01.0918
KoreanLunisolarCalendar	FirstFourDayWeek	14.02.0918 - 17.02.0918	01.01.0918 - 04.01.0918
PersianCalendar	FirstFullWeek	21.06.0622 - 27.03.0622	01.01.0001 - 07.01.0001
PersianCalendar	FirstFourDayWeek	21.06.0622 - 24.03.0622	01.01.0001 - 04.01.0001
TaiwanLunisolarCalendar	FirstFullWeek	18/2/1912 - 24/2/1912	01.01.0001 - 07.01.0001
TaiwanLunisolarCalendar	FirstFourDayWeek	18.02.1912 - 21.02.1912	01.01.0001 - 04.01.0001
UmAlQuraCalendar	FirstFullWeek	30.04.1900 - 06.05.1900	01.01.1318 - 07.01.1318
UmAlQuraCalendar	FirstFourDayWeek	30.04.1900 - 03.05.1900	01.01.1318 - 04.01.1318

Ayrıca bkz.

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