ComboBox.SelectionChangeCommitted Événement

Définition

Se produit quand l'utilisateur change l'élément sélectionné et quand cette modification est affichée dans ComboBox.Occurs when the user changes the selected item and that change is displayed in the ComboBox.

public:
 event EventHandler ^ SelectionChangeCommitted;
public event EventHandler SelectionChangeCommitted;
member this.SelectionChangeCommitted : EventHandler 
Public Custom Event SelectionChangeCommitted As EventHandler 

Type d'événement

EventHandler

Exemples

L’exemple de code suivant utilise l' SelectionChangeCommitted événement et la SelectionLength propriété pour modifier la longueur de la zone de texte en fonction de ce que l’utilisateur a sélectionné et validé.The following code example uses the SelectionChangeCommitted event and the SelectionLength property to change the length of the text box depending on what the user has selected and committed.

void comboBox1_SelectionChangeCommitted( Object^ sender, EventArgs^ /*e*/ )
{
   ComboBox^ senderComboBox = dynamic_cast<ComboBox^>(sender);
   
   // Change the length of the text box depending on what the user has 
   // selected and committed using the SelectionLength property.
   if ( senderComboBox->SelectionLength > 0 )
   {
       textbox1->Width = 
           senderComboBox->SelectedItem->ToString()->Length * 
           ((int)this->textbox1->Font->SizeInPoints);
       textbox1->Text = senderComboBox->SelectedItem->ToString();				
   }
}
private void comboBox1_SelectionChangeCommitted(object sender, EventArgs e)
{

    ComboBox senderComboBox = (ComboBox) sender;
  
    // Change the length of the text box depending on what the user has 
    // selected and committed using the SelectionLength property.
    if (senderComboBox.SelectionLength > 0)
    {
        textbox1.Width = 
            senderComboBox.SelectedItem.ToString().Length *
            ((int) this.textbox1.Font.SizeInPoints);
        textbox1.Text = senderComboBox.SelectedItem.ToString();
    }
}
Private Sub comboBox1_SelectionChangeCommitted(ByVal sender _
As Object, ByVal e As EventArgs) _
Handles comboBox1.SelectionChangeCommitted

    Dim senderComboBox As ComboBox = CType(sender, ComboBox)

    ' Change the length of the text box depending on what the user has 
    ' selected and committed using the SelectionLength property.
    If (senderComboBox.SelectionLength > 0) Then
        textbox1.Width = _
            senderComboBox.SelectedItem.ToString().Length() * _
            CType(Me.textbox1.Font.SizeInPoints, Integer)
        textbox1.Text = senderComboBox.SelectedItem.ToString()
    End If
End Sub

Remarques

The <xref:System.Windows.Forms.ComboBox.SelectionChangeCommitted> event is raised only when the user changes the combo box selection, and you can create a handler for this event to provide special handling for the <xref:System.Windows.Forms.ComboBox> when the user changes the selected item in the list. Toutefois, selon la façon dont le ComboBox est configuré et la façon dont l’utilisateur modifie l’élément sélectionné, l' SelectionChangeCommitted événement peut ne pas être déclenché.However, depending on how the ComboBox is configured, and how the user changes the selected item, the SelectionChangeCommitted event may not be raised. Vous pouvez également gérer SelectedIndexChanged , mais notez que cet événement se produit si l’index est modifié par programme ou par l’utilisateur.Alternatively, you can handle the SelectedIndexChanged, but note that this event occurs whether the index is changed programmatically or by the user.

Pour plus d'informations sur la gestion des événements, voir gestion et déclenchement d’événements.For more information about handling events, see Handling and Raising Events.

S’applique à