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

Определение

Возвращает неделю года, к которой относится дата в заданном значении DateTime.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

Параметры

time
DateTime DateTime DateTime DateTime

Значение даты и времени.A date and time value.

rule
CalendarWeekRule CalendarWeekRule CalendarWeekRule CalendarWeekRule

Значение перечисления, определяющее календарную неделю.An enumeration value that defines a calendar week.

firstDayOfWeek
DayOfWeek DayOfWeek DayOfWeek DayOfWeek

Значение перечисления, представляющее первый день недели.An enumeration value that represents the first day of the week.

Возвраты

Положительное целое число, представляющее неделю года, к которой относится дата в параметре time.A positive integer that represents the week of the year that includes the date in the time parameter.

Исключения

Время, указанное в параметре time, наступает раньше момента времени, определенного свойством MinSupportedDateTime, или позже момента времени, определенного свойством MaxSupportedDateTime.time is earlier than MinSupportedDateTime or later than MaxSupportedDateTime.

-или--or- firstDayOfWeek не является допустимым значением DayOfWeek.firstDayOfWeek is not a valid DayOfWeek value.

-или--or- rule не является допустимым значением CalendarWeekRule.rule is not a valid CalendarWeekRule value.

Примеры

Следующий пример кода демонстрирует результат GetWeekOfYear изменяется в зависимости от FirstDayOfWeek и CalendarWeekRule используется.The following code example shows how the result of GetWeekOfYear varies depending on the FirstDayOfWeek and the CalendarWeekRule used. Если указанная дата находится последний день года, GetWeekOfYear возвращает общее число недель в году.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
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 'Main 
End Class 'SamplesCalendar


'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).

Комментарии

Этот метод можно использовать для определения количества недель в году, задав time до последнего дня года.This method can be used to determine the number of weeks in the year by setting time to the last day of the year.

DateTimeFormatInfo Объект для определенного языка и региональных параметров, использующий календаря, обозначается DateTimeFormatInfo.Calendar свойства включают следующие значения конкретного языка и региональных параметров, которые могут быть использованы для rule и firstDayOfWeek параметры: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:

  • DateTimeFormatInfo.FirstDayOfWeek Свойство содержит значение по умолчанию первый день недели, который может использоваться для firstDayOfWeek параметра.The DateTimeFormatInfo.FirstDayOfWeek property contains the default first day of the week that can be used for the firstDayOfWeek parameter.

  • DateTimeFormatInfo.CalendarWeekRule Свойство содержит правило неделя календаря по умолчанию, который может использоваться для rule параметра.The DateTimeFormatInfo.CalendarWeekRule property contains the default calendar week rule that can be used for the rule parameter.

В следующем примере используется текущий язык и региональные параметры DateTimeFormatInfo объектом, чтобы определить, что 1 января 2011 г. — в первую неделю года по григорианскому календарю.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)

Для некоторых календарей, вызов GetWeekOfYear вызывает метод ArgumentOutOfRangeException для конкретного сочетания rule и firstDayOfWeek значения, даже если time больше, чем даты, возвращенной этого календаря MinSupportedDateTime свойство.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. В следующей таблице перечислены затронутых календари, конкретный rule значения и спектра ранние поддерживаемые time значения.The following table lists the affected calendars, the specific rule values, and the range of the earliest supported time values. Определенные минимальным DateTime значение зависит от значения firstDayOfWeek параметра.The specific minimum DateTime value depends on the value of the firstDayOfWeek parameter.

КалендарьCalendar Значение CalendarWeekRuleCalendarWeekRule value Дата по григорианскому календарю (M/дд/гггг)Gregorian date (M/dd/yyyy) Даты в календаре (M/дд/гггг)Date in calendar (M/dd/yyyy)
ChineseLunisolarCalendar FirstFullWeek 2/19/1901 на 2/25/19012/19/1901 to 2/25/1901 1/1/1901 к 1/7/19011/1/1901 to 1/7/1901
ChineseLunisolarCalendar FirstFourDayWeek 2/19/1901 на 2/22/19012/19/1901 to 2/22/1901 1/01/1901 к 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 для 9/23/15839/17/1583 to 9/23/1583 1/01/5344 к 1/07/53441/01/5344 to 1/07/5344
HebrewCalendar FirstFourDayWeek 9/17/1583 для 9/20/15839/17/1583 to 9/20/1583 1/01/5344 к 1/04/53441/01/5344 to 1/04/5344
HijriCalendar FirstFullWeek 7/18/0622 для 7/24/06227/18/0622 to 7/24/0622 1/01/0001 в 1/07/0001.1/01/0001 to 1/07/0001
HijriCalendar FirstFourDayWeek 7/18/0622 для 7/21/06227/18/0622 to 7/21/0622 1/01/0001 в 1/04/0001.1/01/0001 to 1/04/0001
JapaneseLunisolarCalendar FirstFullWeek 1/28/1960 года на 2/03/1960 года1/28/1960 to 2/03/1960 1/01/35 к 1/07/00351/01/35 to 1/07/0035
JapaneseLunisolarCalendar FirstFourDayWeek 1/28/1960 года к 1/31/1960 года1/28/1960 to 1/31/1960 1/01/0035 к 1/04/00351/01/0035 to 1/04/0035
JulianCalendar FirstFullWeek 1/01/0001 в 1/05/0001.1/01/0001 to 1/05/0001 1/03/0001 в 1/07/0001.1/03/0001 to 1/07/0001
JulianCalendar FirstFourDayWeek 1/01/0001 02/1/00011/01/0001 to 1/02/0001 1/03/0001 в 1/04/0001.1/03/0001 to 1/04/0001
KoreanLunisolarCalendar FirstFullWeek 2/14/0918 на 2/20/09182/14/0918 to 2/20/0918 1/01/0918 к 1/07/09181/01/0918 to 1/07/0918
KoreanLunisolarCalendar FirstFourDayWeek 2/14/0918 на 2/17/09182/14/0918 to 2/17/0918 1/01/0918 к 1/04/09181/01/0918 to 1/04/0918
PersianCalendar FirstFullWeek 3/21/0622 для 3/27/06223/21/0622 to 3/27/0622 1/01/0001 в 1/07/0001.1/01/0001 to 1/07/0001
PersianCalendar FirstFourDayWeek 3/21/0622 для 3/24/06223/21/0622 to 3/24/0622 1/01/0001 в 1/04/0001.1/01/0001 to 1/04/0001
TaiwanLunisolarCalendar FirstFullWeek 2/18/1912 2/24/19122/18/1912 to 2/24/1912 1/01/0001 в 1/07/0001.1/01/0001 to 1/07/0001
TaiwanLunisolarCalendar FirstFourDayWeek 2/18/1912 2/21/19122/18/1912 to 2/21/1912 1/01/0001 в 1/04/0001.1/01/0001 to 1/04/0001
UmAlQuraCalendar FirstFullWeek 4/30/1900 для 5/06/1900 г.4/30/1900 to 5/06/1900 1/01/1318 к 1/07/13181/01/1318 to 1/07/1318
UmAlQuraCalendar FirstFourDayWeek 4/30/1900 для 5/03/1900 г.4/30/1900 to 5/03/1900 1/01/1318 к 1/04/13181/01/1318 to 1/04/1318

Применяется к

Дополнительно