IDictionary.Keys Propriedade

Definição

Obtém um objeto ICollection que contém as chaves do objeto 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

Valor da propriedade

Um objeto ICollection que contém as chaves do objeto IDictionary.An ICollection object containing the keys of the IDictionary object.

Exemplos

O exemplo de código a seguir demonstra como implementar Keys a propriedade.The following code example demonstrates how to implement the Keys property. Este exemplo de código faz parte de um exemplo maior fornecido para IDictionary a 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

Comentários

A ordem das chaves no objeto retornado ICollection não é especificada, mas é garantido que seja a mesma ordem que os valores correspondentes ICollection no retornado pela Values propriedade.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.

Aplica-se a

Veja também