Calendar.GetWeekOfYear(DateTime, CalendarWeekRule, DayOfWeek) Metode

Definisi

Ruang nama:

System.Globalization

Rakitan:

System.Runtime.dll

Sumber:

Calendar.cs

Mengembalikan minggu dalam setahun yang menyertakan tanggal dalam nilai yang ditentukan DateTime .

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

Nilai tanggal dan waktu.

rule

CalendarWeekRule

Nilai enumerasi yang menentukan minggu kalender.

firstDayOfWeek

DayOfWeek

Nilai enumerasi yang mewakili hari pertama dalam seminggu.

Mengembalikan

Int32

Bilangan bulat positif yang mewakili minggu dalam setahun yang menyertakan tanggal dalam time parameter .

Pengecualian

ArgumentOutOfRangeException

time lebih awal dari MinSupportedDateTime atau lebih baru dari MaxSupportedDateTime.

-atau-

firstDayOfWeek bukan nilai yang valid DayOfWeek .

-atau-

rule bukan nilai yang valid CalendarWeekRule .

Contoh

Contoh kode berikut menunjukkan bagaimana hasilnya GetWeekOfYear bervariasi tergantung pada FirstDayOfWeek dan yang CalendarWeekRule digunakan. Jika tanggal yang ditentukan adalah hari terakhir dalam setahun, GetWeekOfYear mengembalikan jumlah total minggu dalam tahun tersebut.

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).

Keterangan

Metode ini dapat digunakan untuk menentukan jumlah minggu dalam setahun dengan mengatur time ke hari terakhir dalam setahun.

Objek DateTimeFormatInfo untuk budaya tertentu yang menggunakan kalender yang ditunjukkan oleh DateTimeFormatInfo.Calendar properti mencakup nilai khusus budaya berikut yang dapat digunakan untuk rule parameter dan firstDayOfWeek :

• Properti DateTimeFormatInfo.FirstDayOfWeek berisi hari pertama default dalam seminggu yang dapat digunakan untuk firstDayOfWeek parameter .

• Properti DateTimeFormatInfo.CalendarWeekRule berisi aturan minggu kalender default yang dapat digunakan untuk rule parameter .

Catatan

Ini tidak memetakan persis ke ISO 8601. Perbedaan dibahas dalam entri blog format ISO 8601 Week of Year di Microsoft .NET. Dimulai dengan .NET Core 3.0, ISOWeek.GetYear dan ISOWeek.GetWeekOfYear selesaikan masalah ini.

Contoh berikut menggunakan objek budaya DateTimeFormatInfo saat ini untuk menentukan bahwa 1 Januari 2011 adalah pada minggu pertama dalam setahun di kalender Gregorian.

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)

Untuk beberapa kalender, panggilan ke metode melempar ArgumentOutOfRangeException untuk kombinasi rule nilai dan firstDayOfWeek tertentu meskipun time lebih besar dari tanggal yang dikembalikan oleh properti kalender tersebutMinSupportedDateTime.GetWeekOfYear Tabel berikut ini mencantumkan kalender yang terpengaruh, nilai tertentu rule , dan rentang nilai paling awal yang didukung time . Nilai minimum DateTime tertentu tergantung pada nilai firstDayOfWeek parameter.

Kalender	Nilai CalendarWeekRule	Tanggal Gregorian (M/dd/yyyy)	Tanggal dalam kalender (M/dd/yyyy)
ChineseLunisolarCalendar	FirstFullWeek	19/2/1901 hingga 25/2/1901	1/1/1901 hingga 1/7/1901
ChineseLunisolarCalendar	FirstFourDayWeek	19/2/1901 hingga 22/2/1901	1/01/1901 hingga 1/04/1901
HebrewCalendar	FirstDay	9/17/1583	1/01/5344
HebrewCalendar	FirstFullWeek	17/9/1583 hingga 23/9/1583	1/01/5344 hingga 1/07/5344
HebrewCalendar	FirstFourDayWeek	17/9/1583 hingga 20/9/1583	1/01/5344 hingga 1/04/5344
HijriCalendar	FirstFullWeek	18/7/0622 hingga 24/7/0622	1/01/0001 hingga 1/07/0001
HijriCalendar	FirstFourDayWeek	18/7/0622 hingga 21/7/0622	1/01/0001 hingga 1/04/0001
JapaneseLunisolarCalendar	FirstFullWeek	28/1/1960 hingga 2/03/1960	1/01/35 hingga 1/07/0035
JapaneseLunisolarCalendar	FirstFourDayWeek	28/1/1960 hingga 31/1/1960	1/01/0035 hingga 1/04/0035
JulianCalendar	FirstFullWeek	1/01/0001 hingga 1/05/0001	1/03/0001 hingga 1/07/0001
JulianCalendar	FirstFourDayWeek	1/01/0001 hingga 1/02/0001	1/03/0001 hingga 1/04/0001
KoreanLunisolarCalendar	FirstFullWeek	14/2/0918 hingga 20/2/0918	1/01/0918 hingga 1/07/0918
KoreanLunisolarCalendar	FirstFourDayWeek	14/2/0918 hingga 17/2/0918	1/01/0918 hingga 1/04/0918
PersianCalendar	FirstFullWeek	21/3/0622 hingga 27/3/0622	1/01/0001 hingga 1/07/0001
PersianCalendar	FirstFourDayWeek	21/3/0622 hingga 24/3/0622	1/01/0001 hingga 1/04/0001
TaiwanLunisolarCalendar	FirstFullWeek	18/2/1912 hingga 24/2/1912	1/01/0001 hingga 1/07/0001
TaiwanLunisolarCalendar	FirstFourDayWeek	18/2/1912 hingga 21/2/1912	1/01/0001 hingga 1/04/0001
UmAlQuraCalendar	FirstFullWeek	30/4/1900 hingga 5/06/1900	1/01/1318 hingga 1/07/1318
UmAlQuraCalendar	FirstFourDayWeek	30/4/1900 hingga 5/03/1900	1/01/1318 hingga 1/04/1318

Lihat juga

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