IDictionary.Keys Propriété

Définition

Obtient un objet ICollection contenant les clés de l'objet IDictionary.Gets an ICollection object containing the keys of the IDictionary object.

public:
 property System::Collections::ICollection ^ Keys { System::Collections::ICollection ^ get(); };
public System.Collections.ICollection Keys { get; }
member this.Keys : System.Collections.ICollection
Public ReadOnly Property Keys As ICollection

Valeur de propriété

Objet ICollection contenant les clés de l'objet IDictionary.An ICollection object containing the keys of the IDictionary object.

Exemples

L’exemple de code suivant montre comment implémenter Keys la propriété.The following code example demonstrates how to implement the Keys property. Cet exemple de code fait partie d’un exemple plus complet fourni IDictionary pour la classe.This code example is part of a larger example provided for the IDictionary class.

public:
    virtual property ICollection^ Keys
    {
        ICollection^ get()
        {
            // Return an array where each item is a key.
            array<Object^>^ keys = gcnew array<Object^>(itemsInUse);
            for (int i = 0; i < itemsInUse; i++)
            {
                keys[i] = items[i]->Key;
            }
            return keys;
        }
    }
public ICollection Keys
{
    get
    {
        // Return an array where each item is a key.
        Object[] keys = new Object[ItemsInUse];
        for (Int32 n = 0; n < ItemsInUse; n++)
            keys[n] = items[n].Key;
        return keys;
    }
}
Public ReadOnly Property Keys() As ICollection Implements IDictionary.Keys
    Get

        ' Return an array where each item is a key.
        ' Note: Declaring keyArray() to have a size of ItemsInUse - 1
        '       ensures that the array is properly sized, in VB.NET
        '       declaring an array of size N creates an array with
        '       0 through N elements, including N, as opposed to N - 1
        '       which is the default behavior in C# and C++.
        Dim keyArray() As Object = New Object(ItemsInUse - 1) {}
        Dim n As Integer
        For n = 0 To ItemsInUse - 1
            keyArray(n) = items(n).Key
        Next n

        Return keyArray
    End Get
End Property

Remarques

L’ordre des clés dans l’objet retourné ICollection n’est pas spécifié, mais il est garanti qu’il s’agit du même ordre que les valeurs ICollection correspondantes dans Values le retourné par la propriété.The order of the keys in the returned ICollection object is unspecified, but is guaranteed to be the same order as the corresponding values in the ICollection returned by the Values property.

S’applique à

Voir aussi