DateTime.DaysInMonth(Int32, Int32) DateTime.DaysInMonth(Int32, Int32) DateTime.DaysInMonth(Int32, Int32) DateTime.DaysInMonth(Int32, Int32) Method

Определение

Возвращает число дней в указанном месяце указанного года.Returns the number of days in the specified month and year.

public:
 static int DaysInMonth(int year, int month);
public static int DaysInMonth (int year, int month);
static member DaysInMonth : int * int -> int
Public Shared Function DaysInMonth (year As Integer, month As Integer) As Integer

Параметры

year
Int32 Int32 Int32 Int32

Год.The year.

month
Int32 Int32 Int32 Int32

Месяц (число в диапазоне от 1 до 12).The month (a number ranging from 1 to 12).

Возвраты

Число дней в month для заданного year.The number of days in month for the specified year.

Например, если параметр month равен 2 для февраля, возвращаемым значением является 28 или 29 в зависимости от того, является ли year високосным годом.For example, if month equals 2 for February, the return value is 28 or 29 depending upon whether year is a leap year.

Исключения

Параметр month имеет значение меньше 1 или больше 12.month is less than 1 or greater than 12.

- или --or- Параметр year меньше 1 или больше 9999.year is less than 1 or greater than 9999.

Примеры

Следующий пример демонстрирует, как использовать DaysInMonth метод для определения числа дней в июля 2001 года февраля 1998 (- високосном году), а также февраля 1996 г. (високосный год).The following example demonstrates how to use the DaysInMonth method to determine the number of days in July 2001, February 1998 (a non-leap year), and February 1996 (a leap year).

using namespace System;

int main()
{
   const int July = 7;
   const int Feb = 2;
   
   int daysInJuly = System::DateTime::DaysInMonth( 2001, July );
   Console::WriteLine(daysInJuly);   
   // daysInFeb gets 28 because the year 1998 was not a leap year.
   int daysInFeb = System::DateTime::DaysInMonth( 1998, Feb );
   Console::WriteLine(daysInFeb);
   // daysInFebLeap gets 29 because the year 1996 was a leap year.
   int daysInFebLeap = System::DateTime::DaysInMonth( 1996, Feb );
   Console::WriteLine(daysInFebLeap);
}
// The example displays the following output:
//       31
//       28
//       29
using System;

class Example
{
	static void Main()
	{
		const int July = 7;
		const int Feb = 2;

		int daysInJuly = System.DateTime.DaysInMonth(2001, July);
        Console.WriteLine(daysInJuly);
        
		// daysInFeb gets 28 because the year 1998 was not a leap year.
		int daysInFeb = System.DateTime.DaysInMonth(1998, Feb);
        Console.WriteLine(daysInFeb);
        
		// daysInFebLeap gets 29 because the year 1996 was a leap year.
		int daysInFebLeap = System.DateTime.DaysInMonth(1996, Feb);
		Console.WriteLine(daysInFebLeap);
	}
}
// The example displays the following output:
//       31
//       28
//       29
Class Example
   Public Shared Sub Main()
      Const July As Integer = 7
      Const Feb As Integer = 2

      Dim daysInJuly As Integer = System.DateTime.DaysInMonth(2001, July)
      Console.WriteLine(daysInJuly)
      
      ' daysInFeb gets 28 because the year 1998 was not a leap year.
      Dim daysInFeb As Integer = System.DateTime.DaysInMonth(1998, Feb)
      Console.WriteLine(daysInFeb)
      ' daysInFebLeap gets 29 because the year 1996 was a leap year.
      Dim daysInFebLeap As Integer = System.DateTime.DaysInMonth(1996, Feb)
      Console.WriteLine(daysInFebLeap)
   End Sub
End Class
' The example displays the following output:
'       31
'       28
'       29

Следующий пример отображает количество дней в каждый месяц в году, указанный в массив целых чисел.The following example displays the number of days in each month of a year specified in an integer array.

using System;
using System.Globalization;

public class Example
{
   public static void Main()
   {
      int[] years = { 2012, 2014 };
      DateTimeFormatInfo dtfi = DateTimeFormatInfo.CurrentInfo;
      Console.WriteLine("Days in the Month for the {0} culture " +
                        "using the {1} calendar\n", 
                        CultureInfo.CurrentCulture.Name, 
                        dtfi.Calendar.GetType().Name.Replace("Calendar", ""));
      Console.WriteLine("{0,-10}{1,-15}{2,4}\n", "Year", "Month", "Days");
      
      foreach (var year in years) {
         for (int ctr = 0; ctr <= dtfi.MonthNames.Length - 1; ctr++) {
            if (String.IsNullOrEmpty(dtfi.MonthNames[ctr]))  
               continue;
            
            Console.WriteLine("{0,-10}{1,-15}{2,4}", year, 
                              dtfi.MonthNames[ctr], 
                              DateTime.DaysInMonth(year, ctr + 1));
         }
         Console.WriteLine(); 
      }
   }
}
// The example displays the following output:
//    Days in the Month for the en-US culture using the Gregorian calendar
//    
//    Year      Month          Days
//    
//    2012      January          31
//    2012      February         29
//    2012      March            31
//    2012      April            30
//    2012      May              31
//    2012      June             30
//    2012      July             31
//    2012      August           31
//    2012      September        30
//    2012      October          31
//    2012      November         30
//    2012      December         31
//    
//    2014      January          31
//    2014      February         28
//    2014      March            31
//    2014      April            30
//    2014      May              31
//    2014      June             30
//    2014      July             31
//    2014      August           31
//    2014      September        30
//    2014      October          31
//    2014      November         30
//    2014      December         31
Imports System.Globalization

Module Example
   Public Sub Main()
      Dim years() As Integer = { 2012, 2014 }
      Dim dtfi As DateTimeFormatInfo = DateTimeFormatInfo.CurrentInfo
      Console.WriteLine("Days in the Month for the {0} culture " +
                        "using the {1} calendar", 
                        CultureInfo.CurrentCulture.Name, 
                        dtfi.Calendar.GetType.Name.Replace("Calendar", ""))
      Console.WriteLine()
      Console.WriteLine("{0,-10}{1,-15}{2,4}", "Year", "Month", "Days")
      Console.WriteLine()
      
      For Each [year] As Integer In years
         For ctr As Integer = 0 To dtfi.MonthNames.Length - 1
            If String.IsNullOrEmpty(dtfi.MonthNames(ctr)) Then 
               Continue For
            End If    
            
            Console.WriteLine("{0,-10}{1,-15}{2,4}", [year], 
                              dtfi.MonthNames(ctr), 
                              DateTime.DaysInMonth([year], ctr + 1))
         Next
         Console.WriteLine() 
      Next
   End Sub
End Module
' The example displays the following output:
'    Days in the Month for the en-US culture using the Gregorian calendar
'    
'    Year      Month          Days
'    
'    2012      January          31
'    2012      February         29
'    2012      March            31
'    2012      April            30
'    2012      May              31
'    2012      June             30
'    2012      July             31
'    2012      August           31
'    2012      September        30
'    2012      October          31
'    2012      November         30
'    2012      December         31
'    
'    2014      January          31
'    2014      February         28
'    2014      March            31
'    2014      April            30
'    2014      May              31
'    2014      June             30
'    2014      July             31
'    2014      August           31
'    2014      September        30
'    2014      October          31
'    2014      November         30
'    2014      December         31

Комментарии

DaysInMonth Метод всегда интерпретирует month и year как месяц и год от григорианский календарь, даже если григорианский календарь не текущего календаря текущего языка и региональных параметров.The DaysInMonth method always interprets month and year as the month and year of the Gregorian calendar even if the Gregorian calendar is not the current culture's current calendar. Чтобы получить число дней в указанном месяце конкретного календаря, вызов этого календаря GetDaysInMonth метод.To get the number of days in a specified month of a particular calendar, call that calendar's GetDaysInMonth method.

Применяется к