Comparer Classe

Definizione

public ref class Comparer sealed : System::Collections::IComparer

public ref class Comparer sealed : System::Collections::IComparer, System::Runtime::Serialization::ISerializable

public sealed class Comparer : System.Collections.IComparer

public sealed class Comparer : System.Collections.IComparer, System.Runtime.Serialization.ISerializable

[System.Serializable]
public sealed class Comparer : System.Collections.IComparer, System.Runtime.Serialization.ISerializable

[System.Serializable]
[System.Runtime.InteropServices.ComVisible(true)]
public sealed class Comparer : System.Collections.IComparer, System.Runtime.Serialization.ISerializable

type Comparer = class
    interface IComparer

type Comparer = class
    interface IComparer
    interface ISerializable

[<System.Serializable>]
type Comparer = class
    interface IComparer
    interface ISerializable

[<System.Serializable>]
[<System.Runtime.InteropServices.ComVisible(true)>]
type Comparer = class
    interface IComparer
    interface ISerializable

Public NotInheritable Class Comparer
Implements IComparer

Public NotInheritable Class Comparer
Implements IComparer, ISerializable

Ereditarietà

Object

Comparer

Attributi

SerializableAttribute ComVisibleAttribute

Implementazioni

IComparer ISerializable

Esempio

Nell'esempio di codice seguente viene illustrato come Compare restituisce valori diversi a seconda delle impostazioni cultura associate a Comparer.

using namespace System;
using namespace System::Collections;
using namespace System::Globalization;
int main()
{
   
   // Creates the strings to compare.
   String^ str1 = "llegar";
   String^ str2 = "lugar";
   Console::WriteLine( "Comparing \"{0}\" and \"{1}\" ...", str1, str2 );
   
   // Uses the DefaultInvariant Comparer.
   Console::WriteLine( "   Invariant Comparer: {0}", Comparer::DefaultInvariant->Compare( str1, str2 ) );
   
   // Uses the Comparer based on the culture "es-ES" (Spanish - Spain, international sort).
   Comparer^ myCompIntl = gcnew Comparer( gcnew CultureInfo(  "es-ES",false ) );
   Console::WriteLine( "   International Sort: {0}", myCompIntl->Compare( str1, str2 ) );
   
   // Uses the Comparer based on the culture identifier 0x040A (Spanish - Spain, traditional sort).
   Comparer^ myCompTrad = gcnew Comparer( gcnew CultureInfo( 0x040A,false ) );
   Console::WriteLine( "   Traditional Sort  : {0}", myCompTrad->Compare( str1, str2 ) );
}

/*
This code produces the following output.

Comparing "llegar" and "lugar" ...
   Invariant Comparer: -1
   International Sort: -1
   Traditional Sort  : 1

*/

using System;
using System.Collections;
using System.Globalization;

public class SamplesComparer  {

   public static void Main()  {

      // Creates the strings to compare.
      String str1 = "llegar";
      String str2 = "lugar";
      Console.WriteLine( "Comparing \"{0}\" and \"{1}\" ...", str1, str2 );

      // Uses the DefaultInvariant Comparer.
      Console.WriteLine( "   Invariant Comparer: {0}", Comparer.DefaultInvariant.Compare( str1, str2 ) );

      // Uses the Comparer based on the culture "es-ES" (Spanish - Spain, international sort).
      Comparer myCompIntl = new Comparer( new CultureInfo( "es-ES", false ) );
      Console.WriteLine( "   International Sort: {0}", myCompIntl.Compare( str1, str2 ) );

      // Uses the Comparer based on the culture identifier 0x040A (Spanish - Spain, traditional sort).
      Comparer myCompTrad = new Comparer( new CultureInfo( 0x040A, false ) );
      Console.WriteLine( "   Traditional Sort  : {0}", myCompTrad.Compare( str1, str2 ) );
   }
}

/*
This code produces the following output.

Comparing "llegar" and "lugar" ...
   Invariant Comparer: -1
   International Sort: -1
   Traditional Sort  : 1

*/

Imports System.Collections
Imports System.Globalization

Public Class SamplesComparer

   Public Shared Sub Main()

      ' Creates the strings to compare.
      Dim str1 As [String] = "llegar"
      Dim str2 As [String] = "lugar"
      Console.WriteLine("Comparing ""{0}"" and ""{1}"" ...", str1, str2)

      ' Uses the DefaultInvariant Comparer.
      Console.WriteLine("   Invariant Comparer: {0}", Comparer.DefaultInvariant.Compare(str1, str2))

      ' Uses the Comparer based on the culture "es-ES" (Spanish - Spain, international sort).
      Dim myCompIntl As New Comparer(New CultureInfo("es-ES", False))
      Console.WriteLine("   International Sort: {0}", myCompIntl.Compare(str1, str2))

      ' Uses the Comparer based on the culture identifier 0x040A (Spanish - Spain, traditional sort).
      Dim myCompTrad As New Comparer(New CultureInfo(&H40A, False))
      Console.WriteLine("   Traditional Sort  : {0}", myCompTrad.Compare(str1, str2))

   End Sub

End Class


'This code produces the following output.
'
'Comparing "llegar" and "lugar" ...
'   Invariant Comparer: -1
'   International Sort: -1
'   Traditional Sort  : 1

Commenti

Questa classe è l'implementazione predefinita dell'interfaccia IComparer . La CaseInsensitiveComparer classe è l'implementazione dell'interfaccia IComparer che esegue confronti tra stringhe senza distinzione tra maiuscole e minuscole. System.Collections.Generic.Comparer<T> è l'equivalente generico di questa classe.

Le procedure di confronto usano l'oggetto Thread.CurrentCulture del thread corrente, a meno che non sia specificato in altro modo. I confronti di stringhe potrebbero avere risultati diversi a seconda delle impostazioni cultura. Per altre informazioni sui confronti specifici delle impostazioni cultura, vedere lo spazio dei nomi e la globalizzazione e laSystem.Globalization localizzazione.

Costruttori

Campi

Metodi

Si applica a

Vedi anche

• IComparer
• IComparable
• CaseInsensitiveComparer
• Comparer<T>
• CompareInfo
• CurrentCulture
• CultureInfo