在WPF装饰器中绘制虚线

看看 Pen.DashStyle 财产。您可以使用 DashStyles 类,它提供一些预定义的破折号样式,或者您可以通过创建新的破折号和间隙来指定自己的图案。 DashStyle 实例。

var pen = new Pen(new SolidColorBrush(Color.FromRgb(200, 10, 20)), 2);
pen.DashStyle = DashStyles.Dash;
drawingContext.DrawLine(pen, point1, point2);

你不必拘泥于原语。如果遵循此模式,可以向装饰器添加任何内容。

public class ContainerAdorner : Adorner
{
    // To store and manage the adorner's visual children.
    VisualCollection visualChildren;

    // Override the VisualChildrenCount and GetVisualChild properties to interface with 
    // the adorner's visual collection.
    protected override int VisualChildrenCount { get { return visualChildren.Count; } }
    protected override Visual GetVisualChild(int index) { return visualChildren[index]; }

    // Initialize the ResizingAdorner.
    public ContainerAdorner (UIElement adornedElement)
        : base(adornedElement)
    {
        visualChildren = new VisualCollection(this);
        visualChildren.Add(_Container);
    }
    ContainerClass _Container= new ContainerClass();

    protected override Size ArrangeOverride(Size finalSize)
    {
        // desiredWidth and desiredHeight are the width and height of the element that's being adorned.  
        // These will be used to place the Adorner at the corners of the adorned element.  
        double desiredWidth = AdornedElement.DesiredSize.Width;
        double desiredHeight = AdornedElement.DesiredSize.Height;

        FrameworkElement fe;
        if ((fe = AdornedElement as FrameworkElement) != null)
        {
            desiredWidth = fe.ActualWidth;
            desiredHeight = fe.ActualHeight;
        }

        _Container.Arrange(new Rect(0, 0, desiredWidth, desiredHeight));

        return finalSize;
    }
}