ListView.DrawColumnHeader ListView.DrawColumnHeader ListView.DrawColumnHeader ListView.DrawColumnHeader Event

Définition

Se produit lorsque le mode Détails de ListView est dessiné et que la propriété OwnerDraw a la valeur true.Occurs when the details view of a ListView is drawn and the OwnerDraw property is set to true.

public:
 event System::Windows::Forms::DrawListViewColumnHeaderEventHandler ^ DrawColumnHeader;
public event System.Windows.Forms.DrawListViewColumnHeaderEventHandler DrawColumnHeader;
member this.DrawColumnHeader : System.Windows.Forms.DrawListViewColumnHeaderEventHandler 
Public Custom Event DrawColumnHeader As DrawListViewColumnHeaderEventHandler 

Exemples

L’exemple de code suivant fournit une implémentation d' DrawColumnHeader un gestionnaire d’événements.The following code example provides an implementation of a DrawColumnHeader event handler. Pour obtenir un exemple complet, y compris l’implémentation DrawSubItem du gestionnaire d’événements, OwnerDraw consultez la rubrique de référence.For the complete example, including the implementation of the DrawSubItem event handler, see the OwnerDraw reference topic.

// Draws column headers.
private void listView1_DrawColumnHeader(object sender,
    DrawListViewColumnHeaderEventArgs e)
{
    using (StringFormat sf = new StringFormat())
    {
        // Store the column text alignment, letting it default
        // to Left if it has not been set to Center or Right.
        switch (e.Header.TextAlign)
        {
            case HorizontalAlignment.Center:
                sf.Alignment = StringAlignment.Center;
                break;
            case HorizontalAlignment.Right:
                sf.Alignment = StringAlignment.Far;
                break;
        }

        // Draw the standard header background.
        e.DrawBackground();

        // Draw the header text.
        using (Font headerFont =
                    new Font("Helvetica", 10, FontStyle.Bold))
        {
            e.Graphics.DrawString(e.Header.Text, headerFont,
                Brushes.Black, e.Bounds, sf);
        }
    }
    return;
}
' Draws column headers.
Private Sub listView1_DrawColumnHeader(ByVal sender As Object, _
    ByVal e As DrawListViewColumnHeaderEventArgs) _
    Handles listView1.DrawColumnHeader

    Dim sf As New StringFormat()
    Try

        ' Store the column text alignment, letting it default
        ' to Left if it has not been set to Center or Right.
        Select Case e.Header.TextAlign
            Case HorizontalAlignment.Center
                sf.Alignment = StringAlignment.Center
            Case HorizontalAlignment.Right
                sf.Alignment = StringAlignment.Far
        End Select

        ' Draw the standard header background.
        e.DrawBackground()

        ' Draw the header text.
        Dim headerFont As New Font("Helvetica", 10, FontStyle.Bold)
        Try
            e.Graphics.DrawString(e.Header.Text, headerFont, _
                Brushes.Black, e.Bounds, sf)
        Finally
            headerFont.Dispose()
        End Try

    Finally
        sf.Dispose()
    End Try

End Sub

Remarques

Cet événement vous permet de personnaliser l’apparence d' ListView un contrôle à l’aide du dessin owner-drawn.This event lets you customize the appearance of a ListView control using owner drawing. Il est déclenché uniquement lorsque la OwnerDraw propriété a la true valeur et que View View.Detailsla propriété a la valeur.It is raised only when the OwnerDraw property is set to true and the View property is set to View.Details. Cet événement peut se produire pour chaque en-tête de colonne du contrôle.This event can occur for each column header in the control. Pour plus d’informations sur le dessin owner- OwnerDraw drawn, consultez la rubrique de référence sur les propriétés.For more information on owner drawing, see the OwnerDraw property reference topic.

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

Voir aussi