IDictionary.Remove(Object) Method

Definition

Namespace:
System.Collections
Assembly:
System.Runtime.dll
Assembly:
mscorlib.dll
Assembly:
netstandard.dll

Supprime de l’objet IDictionary l’élément ayant la clé spécifiée.Removes the element with the specified key from the IDictionary object.

public:
 void Remove(System::Object ^ key);
public void Remove (object key);
abstract member Remove : obj -> unit
Public Sub Remove (key As Object)

Parameters

key
Object

Clé de l'élément à supprimer.The key of the element to remove.

Exceptions

ArgumentNullException

key a la valeur null.key is null.

NotSupportedException

L'objet IDictionary est en lecture seule.The IDictionary object is read-only.

-ou--or- IDictionary est de taille fixe.The IDictionary has a fixed size.

Examples

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

public:
    virtual void Remove(Object^ key)
    {
        if (key == nullptr)
        {
            throw gcnew ArgumentNullException("key");
        }
        // Try to find the key in the DictionaryEntry array
        int index;
        if (TryGetIndexOfKey(key, &index))
        {
            // If the key is found, slide all the items down.
            Array::Copy(items, index + 1, items, index, itemsInUse -
                index - 1);
            itemsInUse--;
        }
        else
        {
            // If the key is not in the dictionary, just return.
            return;
        }
    }

public void Remove(object key)
{
    if (key == null) throw new ArgumentNullException("key");
    // Try to find the key in the DictionaryEntry array
    Int32 index;
    if (TryGetIndexOfKey(key, out index))
    {
        // If the key is found, slide all the items up.
        Array.Copy(items, index + 1, items, index, ItemsInUse - index - 1);
        ItemsInUse--;
    }
    else
    {
        // If the key is not in the dictionary, just return.
    }
}

Public Sub Remove(ByVal key As Object) Implements IDictionary.Remove
    If key = Nothing Then
        Throw New ArgumentNullException("key")
    End If
    ' Try to find the key in the DictionaryEntry array
    Dim index As Integer
    If TryGetIndexOfKey(key, index) Then

        ' If the key is found, slide all the items up.
        Array.Copy(items, index + 1, items, index, (ItemsInUse - index) - 1)
        ItemsInUse = ItemsInUse - 1
    Else

        ' If the key is not in the dictionary, just return. 
    End If
End Sub

Remarks

Si l'objet IDictionary ne contient pas d'élément avec la clé spécifiée, IDictionary reste inchangé.If the IDictionary object does not contain an element with the specified key, the IDictionary remains unchanged. Aucune exception n'est levée.No exception is thrown.

Applies to