WPF中的Adorner，isEnabled无法正常工作？

我正在使用一个adorner层在我的网格（WPF网格）上制作一个网格（比如整个屏幕上的框） .

我希望仅在标记复选框时显示此项 . 但是，当我绑定“IsEnabled”属性时，没有任何反应 . 即使我将IsEnabled设置为false，仍会显示网格覆盖！

这是我在mainWindow.xaml中的操作，注意IsEnabled设置为false，但它仍然显示：

<Grid>
        <!--Adornerdecorator is made to make sure the adorner is in the background, and not the foreground-->
        <AdornerDecorator>
          <View:GridWithRulerxaml IsEnabled="False" />
        </AdornerDecorator>
        <ItemsControl ItemsSource="{Binding Classes}"/>
        <ItemsControl ItemsSource="{Binding Edges}"/>
    </Grid>

这是adorner usercontrol：

namespace UMLDesigner.View
{
/// <summary>
/// Interaction logic for GridWithRulerxaml.xaml
/// </summary>
public partial class GridWithRulerxaml : UserControl
{
    public GridWithRulerxaml()
    {
        InitializeComponent();

        //Loaded event is necessary as Adorner is null until control is shown.
        Loaded += GridWithRulerxaml_Loaded;

    }

    void GridWithRulerxaml_Loaded(object sender, RoutedEventArgs e)
    {
        var adornerLayer = AdornerLayer.GetAdornerLayer(this);
        var rulerAdorner = new AlignmentAdorner(this);
        adornerLayer.Add(rulerAdorner);
    }
}
}

最后是装饰者本身：

namespace UMLDesigner.Utilities
{
public class AlignmentAdorner : Adorner
{
    private FrameworkElement element;
    public AlignmentAdorner(UIElement el)
        : base(el)
    {
        element = el as FrameworkElement;
    }

    protected override void OnRender(System.Windows.Media.DrawingContext drawingContext)
    {
        base.OnRender(drawingContext);

        double height = element.ActualHeight;
        double width = element.ActualWidth;

        double linesHorizontal = height / 50;
        double linesVertical = width / 50;

        var pen = new Pen(Brushes.LightGray, 1) { StartLineCap = PenLineCap.Triangle,     EndLineCap = PenLineCap.Triangle };

        int offset = 0;

        for (int i = 0; i <= linesVertical; ++i)
        {
            offset = offset + 50;
            drawingContext.DrawLine(pen, new Point(offset, 0), new Point(offset, height));
        }

        offset = 0;

        for (int i = 0; i <= linesHorizontal; ++i)
        {
            offset = offset + 50;
            drawingContext.DrawLine(pen, new Point(0, offset), new Point(width, offset));
        }
    }
}
}

我真的希望你能在这里帮助我 .