IDictionary.Keys IDictionary.Keys IDictionary.Keys IDictionary.Keys Property


Ottiene un oggetto ICollection contenente le chiavi dell'oggetto IDictionary.Gets an ICollection object containing the keys of the IDictionary object.

 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

Valore della proprietà

Oggetto ICollection contenente le chiavi dell'oggetto IDictionary.An ICollection object containing the keys of the IDictionary object.


Esempio di codice seguente viene illustrato come implementare il Keys proprietà.The following code example demonstrates how to implement the Keys property. Questo esempio di codice è parte di un esempio più esaustivo disponibile per il IDictionary classe.This code example is part of a larger example provided for the IDictionary class.

    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
        // 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

        ' 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


L'ordine delle chiavi nell'oggetto restituito ICollection oggetto non è specificato, ma è sicuramente identico all'ordine dei valori corrispondenti nel ICollection restituiti dai Values proprietà.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.

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