DateTimeFormatInfo.LongDatePattern Proprietà

Definizione

Ottiene o imposta la stringa di formato personalizzata per un valore di data estesa.Gets or sets the custom format string for a long date value.

public:
 property System::String ^ LongDatePattern { System::String ^ get(); void set(System::String ^ value); };
public string LongDatePattern { get; set; }
member this.LongDatePattern : string with get, set
Public Property LongDatePattern As String

Valore della proprietà

La stringa di formato personalizzata per un valore di data estesa.The custom format string for a long date value.

Eccezioni

La proprietà viene impostata su null.The property is being set to null.

La proprietà viene impostata e l'oggetto DateTimeFormatInfo è di sola lettura.The property is being set and the DateTimeFormatInfo object is read-only.

Esempi

Nell'esempio seguente viene visualizzato il valore della LongDatePattern proprietà per alcune impostazioni cultura.The following example displays the value of the LongDatePattern property for a few cultures.

using namespace System;
using namespace System::Globalization;
void PrintPattern( String^ myCulture )
{
   CultureInfo^ MyCI = gcnew CultureInfo( myCulture,false );
   DateTimeFormatInfo^ myDTFI = MyCI->DateTimeFormat;
   Console::WriteLine( " {0} {1}", myCulture, myDTFI->LongDatePattern );
}

int main()
{
   
   // Displays the values of the pattern properties.
   Console::WriteLine( " CULTURE    PROPERTY VALUE" );
   PrintPattern( "en-US" );
   PrintPattern( "ja-JP" );
   PrintPattern( "fr-FR" );
}

/*
This code produces the following output.  The question marks take the place of native script characters.

CULTURE    PROPERTY VALUE
en-US     dddd, MMMM dd, yyyy
ja-JP     yyyy'?'M'?'d'?'
fr-FR     dddd d MMMM yyyy

*/
using System;
using System.Globalization;


public class SamplesDTFI  {

   public static void Main()  {

      // Displays the values of the pattern properties.
      Console.WriteLine( " CULTURE    PROPERTY VALUE" );
      PrintPattern( "en-US" );
      PrintPattern( "ja-JP" );
      PrintPattern( "fr-FR" );

   }

   public static void PrintPattern( String myCulture )  {

      DateTimeFormatInfo myDTFI = new CultureInfo( myCulture, false ).DateTimeFormat;
      Console.WriteLine( "  {0}     {1}", myCulture, myDTFI.LongDatePattern );

   }

}

/*
This code produces the following output.  The question marks take the place of native script characters.

 CULTURE    PROPERTY VALUE
  en-US     dddd, MMMM d, yyyy
  ja-JP     yyyy'?'M'?'d'?'
  fr-FR     dddd d MMMM yyyy

*/
Imports System.Globalization

Public Class SamplesDTFI

   Public Shared Sub Main()

      ' Displays the values of the pattern properties.
      Console.WriteLine(" CULTURE    PROPERTY VALUE")
      PrintPattern("en-US")
      PrintPattern("ja-JP")
      PrintPattern("fr-FR")

   End Sub

   Public Shared Sub PrintPattern(myCulture As [String])

      Dim myDTFI As DateTimeFormatInfo = New CultureInfo(myCulture, False).DateTimeFormat
      Console.WriteLine("  {0}     {1}", myCulture, myDTFI.LongDatePattern)

   End Sub

End Class

'This code produces the following output.  The question marks take the place of native script characters.
'
' CULTURE    PROPERTY VALUE
'  en-US     dddd, MMMM d, yyyy
'  ja-JP     yyyy'?'M'?'d'?'
'  fr-FR     dddd d MMMM yyyy
'

Commenti

La LongDatePattern proprietà definisce il formato specifico delle impostazioni cultura delle stringhe di data restituite dalle chiamate DateTime.ToString ai metodi DateTimeOffset.ToString e e dalle stringhe di formato composite che forniscono la stringa di formato standard "D".The LongDatePattern property defines the culture-specific format of date strings that are returned by calls to the DateTime.ToString and DateTimeOffset.ToString methods and by composite format strings that are supplied the "D" standard format string. Nell'esempio seguente vengono illustrate le relazioni tra le seguenti: la stringa di formato standard "D", la stringa di formato personalizzata LongDatePattern restituita dalla proprietà e la rappresentazione specifica delle impostazioni cultura di una data.The following example illustrates the relationships among the following: the "D" standard format string, the custom format string returned by the LongDatePattern property, and the culture-specific representation of a date.

using System;
using System.Globalization;

public class Example
{
   public static void Main()
   {
      DateTime date1 = new DateTime(2001, 11, 12);
      string[] cultureNames = { "en-US", "fr-FR", "ru-RU", "de-DE" };
      Console.WriteLine("{0,-7} {1,-20} {2:D}\n", "Culture", "Long Date Pattern", "Date");
      foreach (var cultureName in cultureNames) {
         CultureInfo culture = CultureInfo.CreateSpecificCulture(cultureName);
         Console.WriteLine("{0,-7} {1,-20} {2}", 
                           culture.Name, 
                           culture.DateTimeFormat.LongDatePattern, 
                           date1.ToString("D", culture));                 
      }
   }
}
// The example displays the following output:
//    Culture Long Date Pattern    Date
//    en-US   dddd, MMMM d, yyyy  Saturday, November 12, 2011
//    fr-FR   dddd d MMMM yyyy     samedi 12 novembre 2011
//    ru-RU   d MMMM yyyy 'г.'     12 ноября 2011 г.
//    de-DE   dddd, d. MMMM yyyy   Samstag, 12. November 2011
Imports System.Globalization

Module Example
   Public Sub Main()
      Dim date1 As Date = #11/12/2011#
      Dim cultureNames() As String = { "en-US", "fr-FR", "ru-RU", "de-DE" }
      Console.WriteLine("{0,-7} {1,-20} {2:D}", "Culture", "Long Date Pattern", "Date")
      Console.WriteLine()
      For Each cultureName In cultureNames
         Dim culture As CultureInfo = CultureInfo.CreateSpecificCulture(cultureName)
         Console.WriteLine("{0,-7} {1,-20} {2}", culture.Name, culture.DateTimeFormat.LongDatePattern, 
                           date1.ToString("D", culture))                 
      Next
   End Sub
End Module
' The example displays the following output:
'    Culture Long Date Pattern    Date
'    en-US   dddd, MMMM d, yyyy  Saturday, November 12, 2011
'    fr-FR   dddd d MMMM yyyy     samedi 12 novembre 2011
'    ru-RU   d MMMM yyyy 'г.'     12 ноября 2011 г.
'    de-DE   dddd, d. MMMM yyyy   Samstag, 12. November 2011

Vedere stringhe di formato di data e ora personalizzato per singoli identificatori di formato personalizzati che possono essere combinati per costruire stringhe di formato personalizzate, ad esempio "dddd, dd MMMM aaaa".See Custom Date and Time Format Strings for individual custom format specifiers that can be combined to construct custom format strings such as "dddd, dd MMMM yyyy".

È necessario impostare il separatore della data nel modello di data estesa su una stringa esatta anziché utilizzare il segnaposto per il separatore di data.You should set the date separator in the long date pattern to an exact string instead of using the date separator placeholder. Per ottenere, ad esempio, il modello MM-gg-aaaa, impostare il modello di data estesa su "MM-gg-aaaa".For example, to obtain the pattern MM-DD-yyyy, set the long date pattern to "MM-DD-yyyy".

Il valore di questa proprietà può variare se il calendario utilizzato dalle impostazioni cultura viene modificato.The value of this property may change if the calendar used by a culture changes. Ad esempio, nell'esempio seguente viene illustrato come LongDatePattern la proprietà di CultureInfo un oggetto che rappresenta le impostazioni cultura arabe (Siria) cambia Calendar quando l'oggetto utilizzato dalle impostazioni cultura cambia.For instance, the following example shows how the LongDatePattern property of a CultureInfo object that represents the Arabic (Syria) culture changes when the Calendar object used by the culture changes.

using System;
using System.Globalization;
using System.IO;

public class Example
{
   public static void Main()
   {
      DateTime date1 = new DateTime(2011, 8, 7);
      CultureInfo ci = CultureInfo.CreateSpecificCulture("ar-SY");
      StreamWriter sw = new StreamWriter(@".\arSYCalendars.txt"); 

      sw.WriteLine("{0,-32} {1,-21} {2}\n", 
                   "Calendar", "Long Date Pattern", "Example Date");
      foreach (var cal in ci.OptionalCalendars) {
         ci.DateTimeFormat.Calendar = cal;
         sw.WriteLine("{0,-32} {1,-21} {2}", GetCalendarName(cal), 
                                             ci.DateTimeFormat.LongDatePattern,
                                             date1.ToString("D", ci));
      }     
      sw.Close();
   }

   private static string GetCalendarName(Calendar cal)
   {
      string calName;
      calName = cal.GetType().Name.Substring(0, cal.GetType().Name.IndexOf("Cal"));
      if (calName.Equals("Gregorian")) {
         GregorianCalendar grCal = cal as GregorianCalendar;
         calName += String.Format("-{0}", grCal.CalendarType);    
      }
      return calName;
   }
}
// The example generates the following output:
//    Calendar                         Long Date Pattern     Example Date
//    
//    Gregorian-Localized              dd MMMM, yyyy         07 آب, 2011
//    UmAlQura                         dd/MMMM/yyyy          07/رمضان/1432
//    Hijri                            dd/MM/yyyy            08/09/1432
//    Gregorian-USEnglish              dddd, MMMM dd, yyyy   Sunday, August 07, 2011
//    Gregorian-MiddleEastFrench       dddd, MMMM dd, yyyy   dimanche, août 07, 2011
//    Gregorian-TransliteratedEnglish  dddd, MMMM dd, yyyy   الأحد, أغسطس 07, 2011
//    Gregorian-TransliteratedFrench   dddd, MMMM dd, yyyy   الأحد, أوت 07, 2011
Imports System.Globalization
Imports System.IO

Module Example
   Public Sub Main()
      Dim date1 As Date = #8/7/2011#
      Dim ci As CultureInfo = CultureInfo.CreateSpecificCulture("ar-SY")
      Dim sw As New StreamWriter(".\arSYCalendars.txt") 

      sw.WriteLine("{0,-32} {1,-21} {2}", 
                   "Calendar", "Long Date Pattern", "Example Date")
      sw.WriteLine()
      For Each cal As Calendar In ci.OptionalCalendars
         ci.DateTimeFormat.Calendar = cal
         sw.WriteLine("{0,-32} {1,-21} {2}", GetCalendarName(cal), 
                                             ci.DateTimeFormat.LongDatePattern,
                                             date1.ToString("D", ci))
      Next     
      sw.Close()
   End Sub
   
   Private Function GetCalendarName(cal As Calendar) As String
      Dim calName As String
      calName = cal.GetType().Name.Substring(0, cal.GetType().Name.IndexOf("Cal"))
      If calName.Equals("Gregorian") Then
         Dim grCal As GregorianCalendar = DirectCast(cal, GregorianCalendar)
         calName += String.Format("-{0}", grCal.CalendarType)    
      End If
      Return calName
   End Function
End Module
' The example generates the following output:
'    Calendar                         Long Date Pattern     Example Date
'    
'    Gregorian-Localized              dd MMMM, yyyy         07 آب, 2011
'    UmAlQura                         dd/MMMM/yyyy          07/رمضان/1432
'    Hijri                            dd/MM/yyyy            08/09/1432
'    Gregorian-USEnglish              dddd, MMMM dd, yyyy   Sunday, August 07, 2011
'    Gregorian-MiddleEastFrench       dddd, MMMM dd, yyyy   dimanche, août 07, 2011
'    Gregorian-TransliteratedEnglish  dddd, MMMM dd, yyyy   الأحد, أغسطس 07, 2011
'    Gregorian-TransliteratedFrench   dddd, MMMM dd, yyyy   الأحد, أوت 07, 2011

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