SortedList.ContainsValue(Object) Méthode

Référence

Définition

Espace de noms:: System.Collections

Assemblys:: mscorlib.dll, System.Collections.NonGeneric.dll

Assembly:: System.Collections.NonGeneric.dll

Assembly:: mscorlib.dll

Assembly:: netstandard.dll

Source:: SortedList.cs

Source:: SortedList.cs

Source:: SortedList.cs

Important

Certaines informations portent sur la préversion du produit qui est susceptible d’être en grande partie modifiée avant sa publication. Microsoft exclut toute garantie, expresse ou implicite, concernant les informations fournies ici.

Détermine si un objet SortedList contient une valeur spécifique.

public:
 virtual bool ContainsValue(System::Object ^ value);

public virtual bool ContainsValue (object value);

public virtual bool ContainsValue (object? value);

abstract member ContainsValue : obj -> bool
override this.ContainsValue : obj -> bool

Public Overridable Function ContainsValue (value As Object) As Boolean

Paramètres

value: Object

Valeur à trouver dans l'objet SortedList. La valeur peut être null.

Retours

Boolean

true si l'objet SortedList contient un élément avec le value spécifié ; sinon, false.

Exemples

L’exemple de code suivant montre comment déterminer si un SortedList objet contient un élément spécifique.

#using <system.dll>

using namespace System;
using namespace System::Collections;
void PrintIndexAndKeysAndValues( SortedList^ myList )
{
   Console::WriteLine(  "\t-INDEX-\t-KEY-\t-VALUE-" );
   for ( int i = 0; i < myList->Count; i++ )
   {
      Console::WriteLine(  "\t[{0}]:\t{1}\t{2}", i, myList->GetKey( i ), myList->GetByIndex( i ) );

   }
   Console::WriteLine();
}

int main()
{
   
   // Creates and initializes a new SortedList.
   SortedList^ mySL = gcnew SortedList;
   mySL->Add( 2, "two" );
   mySL->Add( 4, "four" );
   mySL->Add( 1, "one" );
   mySL->Add( 3, "three" );
   mySL->Add( (int^)0, "zero" );
   
   // Displays the values of the SortedList.
   Console::WriteLine(  "The SortedList contains the following values:" );
   PrintIndexAndKeysAndValues( mySL );
   
   // Searches for a specific key.
   int myKey = 2;
   Console::WriteLine(  "The key \"{0}\" is {1}.", myKey, mySL->ContainsKey( myKey ) ? (String^)"in the SortedList" : "NOT in the SortedList" );
   myKey = 6;
   Console::WriteLine(  "The key \"{0}\" is {1}.", myKey, mySL->ContainsKey( myKey ) ? (String^)"in the SortedList" : "NOT in the SortedList" );
   
   // Searches for a specific value.
   String^ myValue = "three";
   Console::WriteLine(  "The value \"{0}\" is {1}.", myValue, mySL->ContainsValue( myValue ) ? (String^)"in the SortedList" : "NOT in the SortedList" );
   myValue =  "nine";
   Console::WriteLine(  "The value \"{0}\" is {1}.", myValue, mySL->ContainsValue( myValue ) ? (String^)"in the SortedList" : "NOT in the SortedList" );
}

/* 
This code produces the following output.

The SortedList contains the following values:
        -INDEX- -KEY-   -VALUE-
        [0]:    0       zero
        [1]:    1       one
        [2]:    2       two
        [3]:    3       three
        [4]:    4       four

The key "2" is in the SortedList.
The key "6" is NOT in the SortedList.
The value "three" is in the SortedList.
The value "nine" is NOT in the SortedList.
*/

using System;
using System.Collections;

public class SamplesSortedList  {

   public static void Main()  {

      // Creates and initializes a new SortedList.
      SortedList mySL = new SortedList();
      mySL.Add( 2, "two" );
      mySL.Add( 4, "four" );
      mySL.Add( 1, "one" );
      mySL.Add( 3, "three" );
      mySL.Add( 0, "zero" );

      // Displays the values of the SortedList.
      Console.WriteLine( "The SortedList contains the following values:" );
      PrintIndexAndKeysAndValues( mySL );

      // Searches for a specific key.
      int myKey = 2;
      Console.WriteLine( "The key \"{0}\" is {1}.", myKey, mySL.ContainsKey( myKey ) ? "in the SortedList" : "NOT in the SortedList" );
      myKey = 6;
      Console.WriteLine( "The key \"{0}\" is {1}.", myKey, mySL.ContainsKey( myKey ) ? "in the SortedList" : "NOT in the SortedList" );

      // Searches for a specific value.
      string myValue = "three";
      Console.WriteLine( "The value \"{0}\" is {1}.", myValue, mySL.ContainsValue( myValue ) ? "in the SortedList" : "NOT in the SortedList" );
      myValue = "nine";
      Console.WriteLine( "The value \"{0}\" is {1}.", myValue, mySL.ContainsValue( myValue ) ? "in the SortedList" : "NOT in the SortedList" );
   }

   public static void PrintIndexAndKeysAndValues( SortedList myList )  {
      Console.WriteLine( "\t-INDEX-\t-KEY-\t-VALUE-" );
      for ( int i = 0; i < myList.Count; i++ )  {
         Console.WriteLine( "\t[{0}]:\t{1}\t{2}", i, myList.GetKey(i), myList.GetByIndex(i) );
      }
      Console.WriteLine();
   }
}
/*
This code produces the following output.

The SortedList contains the following values:
    -INDEX-    -KEY-    -VALUE-
    [0]:    0    zero
    [1]:    1    one
    [2]:    2    two
    [3]:    3    three
    [4]:    4    four

The key "2" is in the SortedList.
The key "6" is NOT in the SortedList.
The value "three" is in the SortedList.
The value "nine" is NOT in the SortedList.
*/

Imports System.Collections

Public Class SamplesSortedList    
    
    Public Shared Sub Main()
        
        ' Creates and initializes a new SortedList.
        Dim mySL As New SortedList()
        mySL.Add(2, "two")
        mySL.Add(4, "four")
        mySL.Add(1, "one")
        mySL.Add(3, "three")
        mySL.Add(0, "zero")
        
        ' Displays the values of the SortedList.
        Console.WriteLine("The SortedList contains the following values:")
        PrintIndexAndKeysAndValues(mySL)
        
        ' Searches for a specific key.
        Dim myKey As Integer = 2
        Dim msg As String
        If mySL.ContainsKey(myKey) Then
            msg = "in the SortedList"
        Else
            msg = "NOT in the SortedList"
        End If
        Console.WriteLine("The key ""{0}"" is {1}.", myKey, msg)
        myKey = 6
        If mySL.ContainsKey(myKey) Then
            msg = "in the SortedList"
        Else
            msg = "NOT in the SortedList"
        End If
        Console.WriteLine("The key ""{0}"" is {1}.", myKey, msg)        
        ' Searches for a specific value.
        Dim myValue As String = "three"
        If mySL.ContainsValue(myValue) Then
            msg = "in the SortedList"
        Else
            msg = "NOT in the SortedList"
        End If
        Console.WriteLine("The value ""{0}"" is {1}.", myValue, msg)
        myValue = "nine"
        If mySL.ContainsValue(myValue) Then
            msg = "in the SortedList"
        Else
            msg = "NOT in the SortedList"
        End If
        Console.WriteLine("The value ""{0}"" is {1}.", myValue, msg)
    End Sub   
    
    
    Public Shared Sub PrintIndexAndKeysAndValues(myList As SortedList)
        Console.WriteLine(ControlChars.Tab & "-INDEX-" & ControlChars.Tab & _
           "-KEY-" & ControlChars.Tab & "-VALUE-")
        Dim i As Integer
        For i = 0 To myList.Count - 1
            Console.WriteLine(ControlChars.Tab & "[{0}]:" & ControlChars.Tab & _
               "{1}" & ControlChars.Tab & "{2}", i, myList.GetKey(i), _
               myList.GetByIndex(i))
        Next i
        Console.WriteLine()
    End Sub
End Class

' This code produces the following output.
' 
' The SortedList contains the following values:
'     -INDEX-    -KEY-    -VALUE-
'     [0]:    0    zero
'     [1]:    1    one
'     [2]:    2    two
'     [3]:    3    three
'     [4]:    4    four
' 
' The key "2" is in the SortedList.
' The key "6" is NOT in the SortedList.
' The value "three" is in the SortedList.
' The value "nine" is NOT in the SortedList.

Remarques

Les valeurs des éléments de l’objet SortedList sont comparées à la valeur spécifiée à l’aide de la Equals méthode .

Cette méthode effectue une recherche linéaire ; par conséquent, le temps d’exécution moyen est proportionnel à Count. Autrement dit, cette méthode est une O(n) opération, où n est Count.

À compter de .NET Framework 2.0, cette méthode utilise les objets et CompareTo les Equals méthodes item de la collection pour déterminer si l’élément existe. Dans les versions antérieures du .NET Framework, cette détermination a été effectuée à l’aide Equals des méthodes et CompareTo du item paramètre sur les objets de la collection.

S’applique à

Partager via