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

定義

指定した DateTime 値の日付を含む年の週を返します。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

パラメーター

time
DateTime DateTime DateTime DateTime

日付と時刻の値。A date and time value.

rule
CalendarWeekRule CalendarWeekRule CalendarWeekRule CalendarWeekRule

カレンダーの週を定義する列挙値。An enumeration value that defines a calendar week.

firstDayOfWeek
DayOfWeek DayOfWeek DayOfWeek DayOfWeek

週の最初の日を表す列挙値。An enumeration value that represents the first day of the week.

戻り値

time パラメーターの日付を含む年の週を表す正の整数。A positive integer that represents the week of the year that includes the date in the time parameter.

例外

timeMinSupportedDateTime よりも前か、MaxSupportedDateTime よりも後です。time is earlier than MinSupportedDateTime or later than MaxSupportedDateTime.

または-or- firstDayOfWeek は有効な DayOfWeek 値ではありません。firstDayOfWeek is not a valid DayOfWeek value.

または-or- rule は有効な CalendarWeekRule 値ではありません。rule is not a valid CalendarWeekRule value.

次のコード例は、結果のGetWeekOfYearかによって異なります、 FirstDayOfWeekCalendarWeekRuleのために使用します。The following code example shows how the result of GetWeekOfYear varies depending on the FirstDayOfWeek and the CalendarWeekRule used. 指定した日付が年の最終日の場合GetWeekOfYearその年の週の合計数を返します。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).

注釈

設定して、年の週の数を決定するこのメソッドを使用できますtime年の最終日にします。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によって示されるカレンダーを使用する特定のカルチャ用のオブジェクト、DateTimeFormatInfo.Calendarプロパティに使用できる次のカルチャに固有の値が含まれています、rulefirstDayOfWeekパラメーター。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:

次のコードの例では、現在のカルチャのDateTimeFormatInfo2011 年 1 月 1 日が、構成のグレゴリオ暦カレンダーにおける年の最初の週を決定するオブジェクト。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)

呼び出しの一部の暦の場合、GetWeekOfYearメソッドがスローされます、ArgumentOutOfRangeExceptionの特定の組み合わせに対してrulefirstDayOfWeek場合であっても値timeがその予定表から返される日付よりも大きいMinSupportedDateTimeプロパティ。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. 次の表に、影響を受けるカレンダーでは、特定のrule値、およびサポートされている最初の範囲time値。The following table lists the affected calendars, the specific rule values, and the range of the earliest supported time values. 特定の最小DateTime値の値に依存、firstDayOfWeekパラメーター。The specific minimum DateTime value depends on the value of the firstDayOfWeek parameter.

予定表Calendar CalendarWeekRule 値CalendarWeekRule value グレゴリオ暦の日付 (M/月/日)Gregorian date (M/dd/yyyy) カレンダー (M/月/日) の日付します。Date in calendar (M/dd/yyyy)
ChineseLunisolarCalendar FirstFullWeek 2/19/1901 年 1901 年 2 月 25 日に2/19/1901 to 2/25/1901 1/1/1901 年 1901 年 1 月 7 日に1/1/1901 to 1/7/1901
ChineseLunisolarCalendar FirstFourDayWeek 2/19/1901 年 1901 年 2 月 22 日に2/19/1901 to 2/22/1901 1/01/1901 年に 1/04/19011/01/1901 to 1/04/1901
HebrewCalendar FirstDay 9/17/15839/17/1583 1/01/53441/01/5344
HebrewCalendar FirstFullWeek 9/23/1583 に 9/17/15839/17/1583 to 9/23/1583 1/01/5344 を 1/07/53441/01/5344 to 1/07/5344
HebrewCalendar FirstFourDayWeek 9/20/1583 に 9/17/15839/17/1583 to 9/20/1583 1/01/5344 を 1/04/53441/01/5344 to 1/04/5344
HijriCalendar FirstFullWeek 7/18/0622 に 7/24/06227/18/0622 to 7/24/0622 1/01/0001 1/07/00011/01/0001 to 1/07/0001
HijriCalendar FirstFourDayWeek 7/18/0622 に 7/21/06227/18/0622 to 7/21/0622 1/01/0001 1/04/00011/01/0001 to 1/04/0001
JapaneseLunisolarCalendar FirstFullWeek 1/28/1960 年に 2/03/19601/28/1960 to 2/03/1960 1/07/0035 を 1/01/351/01/35 to 1/07/0035
JapaneseLunisolarCalendar FirstFourDayWeek 1/28/1960 年に 1/31/19601/28/1960 to 1/31/1960 1/04/0035 を 1/01/00351/01/0035 to 1/04/0035
JulianCalendar FirstFullWeek 1/01/0001 1/05/00011/01/0001 to 1/05/0001 1/03/0001 1/07/00011/03/0001 to 1/07/0001
JulianCalendar FirstFourDayWeek 1/01/0001 0001/1/021/01/0001 to 1/02/0001 1/03/0001 1/04/00011/03/0001 to 1/04/0001
KoreanLunisolarCalendar FirstFullWeek 2/14/0918 に 2/20/09182/14/0918 to 2/20/0918 1/01/0918 を 1/07/09181/01/0918 to 1/07/0918
KoreanLunisolarCalendar FirstFourDayWeek 2/14/0918 に 2/17/09182/14/0918 to 2/17/0918 1/01/0918 を 1/04/09181/01/0918 to 1/04/0918
PersianCalendar FirstFullWeek 3/21/0622 を 3/27/06223/21/0622 to 3/27/0622 1/01/0001 1/07/00011/01/0001 to 1/07/0001
PersianCalendar FirstFourDayWeek 3/21/0622 を 3/24/06223/21/0622 to 3/24/0622 1/01/0001 1/04/00011/01/0001 to 1/04/0001
TaiwanLunisolarCalendar FirstFullWeek 2/18/1912 年 2/24/1912 に2/18/1912 to 2/24/1912 1/01/0001 1/07/00011/01/0001 to 1/07/0001
TaiwanLunisolarCalendar FirstFourDayWeek 2/18/1912 年 2/21/1912 に2/18/1912 to 2/21/1912 1/01/0001 1/04/00011/01/0001 to 1/04/0001
UmAlQuraCalendar FirstFullWeek 4/30/1900 5/06/1900 を4/30/1900 to 5/06/1900 1/07/1318 を 1/01/13181/01/1318 to 1/07/1318
UmAlQuraCalendar FirstFourDayWeek 4/30/1900 5/03/1900 を4/30/1900 to 5/03/1900 1/04/1318 を 1/01/13181/01/1318 to 1/04/1318

適用対象

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