MenuAction.Checked, propriété

Obtient ou définit une valeur indiquant si l'élément de menu est coché.

Espace de noms :  Microsoft.Windows.Design.Interaction
Assembly :  Microsoft.Windows.Design.Interaction (dans Microsoft.Windows.Design.Interaction.dll)

Syntaxe

'Déclaration
Public Property Checked As Boolean
    Get
    Set
public bool Checked { get; set; }
public:
property bool Checked {
    bool get ();
    void set (bool value);
}
member Checked : bool with get, set
function get Checked () : boolean
function set Checked (value : boolean)

Valeur de propriété

Type : System.Boolean
true si l'élément de menu doit être rendu avec une coche ; sinon, false.La valeur par défaut est false.

Notes

La propriété Checked n'a un effet que si la propriété Checkable a la valeur true.

Exemples

L'exemple de code suivant indique comment configurer deux éléments MenuAction d'après la valeur de la propriété Background d'un contrôle. Pour plus d'informations, consultez Procédure pas à pas : création d'un fournisseur de menus.

' The following method handles the UpdateItemStatus event.
' It sets the MenuAction states according to the state
' of the control's Background property. This method is
' called before the context menu is shown.
Sub CustomContextMenuProvider_UpdateItemStatus( _
    ByVal sender As Object, _
    ByVal e As MenuActionEventArgs)

    ' Turn everything on, and then based on the value 
    ' of the BackgroundProperty, selectively turn some off.
    clearBackgroundMenuAction.Checked = False
    clearBackgroundMenuAction.Enabled = True
    setBackgroundToBlueMenuAction.Checked = False
    setBackgroundToBlueMenuAction.Enabled = True

    ' Get a ModelItem which represents the selected control. 
    Dim selectedControl As ModelItem = _
        e.Selection.PrimarySelection

    ' Get the value of the Background property from the ModelItem.
    Dim backgroundProperty As ModelProperty = _
        selectedControl.Properties("Background")

    ' Set the MenuAction items appropriately.
    If Not backgroundProperty.IsSet Then
        clearBackgroundMenuAction.Checked = True
        clearBackgroundMenuAction.Enabled = False
    ElseIf backgroundProperty.ComputedValue.Equals(Brushes.Blue) Then
        setBackgroundToBlueMenuAction.Checked = True
        setBackgroundToBlueMenuAction.Enabled = False
    End If

End Sub
// The following method handles the UpdateItemStatus event.
// It sets the MenuAction states according to the state
// of the control's Background property. This method is
// called before the context menu is shown.
void CustomContextMenuProvider_UpdateItemStatus(
    object sender, 
    MenuActionEventArgs e)
{
    // Turn everything on, and then based on the value 
    // of the BackgroundProperty, selectively turn some off.
    clearBackgroundMenuAction.Checked = false;
    clearBackgroundMenuAction.Enabled = true;
    setBackgroundToBlueMenuAction.Checked = false;
    setBackgroundToBlueMenuAction.Enabled = true;

    // Get a ModelItem which represents the selected control. 
    ModelItem selectedControl = e.Selection.PrimarySelection;

    // Get the value of the Background property from the ModelItem.
    ModelProperty backgroundProperty = 
        selectedControl.Properties["Background"];

    // Set the MenuAction items appropriately.
    if (!backgroundProperty.IsSet)
    {
        clearBackgroundMenuAction.Checked = true;
        clearBackgroundMenuAction.Enabled = false;
    }
    else if (backgroundProperty.ComputedValue == Brushes.Blue)
    {
        setBackgroundToBlueMenuAction.Checked = true;
        setBackgroundToBlueMenuAction.Enabled = false;
    }
}

Sécurité .NET Framework

Voir aussi

Référence

MenuAction Classe

Microsoft.Windows.Design.Interaction, espace de noms

PrimarySelectionContextMenuProvider

MenuGroup

Autres ressources

Procédure pas à pas : création d'un fournisseur de menus