绑定Silverlight的Border.Clip RectangleGeometry.Rect属性

Question

我有以下XAML：

<Border x:Name="ClippingBorder" VerticalAlignment="Stretch" BorderThickness="0">
    <Border.Clip>
        <RectangleGeometry RadiusX="4.4" RadiusY="4.4" Rect="{Binding ClippingRectangle}"/>
    </Border.Clip>
</Border>

以下代码隐藏：

    private Rect clippingRectangle;
    public Rect ClippingRectangle
    {
        get
        {
            return clippingRectangle;
        }
        set
        {
            clippingRectangle = value;
            NotifyPropertyChanged("ClippingRectangle");

        }
    }


    public MainPage()
    {
        InitializeComponent();

        //Get the actual height of the content frame
        ClippingBorder.DataContext = this;
        ContentFrame.SizeChanged += new SizeChangedEventHandler(ContentFrame_SizeChanged);
    }

    void ContentFrame_SizeChanged(object sender, SizeChangedEventArgs e)
    {
        MessageBox.Show(e.NewSize.Height.ToString());
        ClippingRectangle = new Rect(0,0,798,e.NewSize.Height);
    }

调整大小有效，但不幸的是裁剪不起作用，圆角不圆。如果我用ClippingRectangle绑定替换静态值，它就可以工作。但是，当我使用绑定时，它没有。有解决方案吗？

Answer 1

您仍然可以使用以下代码从XAML绑定：

private RectangleGeometry clippingRectangleGeometry;
    public RectangleGeometry ClippingRectangleGeometry
    {
        get
        {
            return clippingRectangleGeometry;
        }
        set
        {
            clippingRectangleGeometry= value;
            NotifyPropertyChanged("ClippingRectangleGeometry");

        }
    }

Answer 2

事实证明，在代码隐藏中设置Border.Clip属性可以解决问题。

    void ContentFrame_SizeChanged(object sender, SizeChangedEventArgs e)
    {
        RectangleGeometry clipRect = new RectangleGeometry();
        clipRect.Rect = new Rect(0,0,798,e.NewSize.Height);
        clipRect.RadiusX = 4.4;
        clipRect.RadiusY = 4.4;
        ClippingBorder.Clip = clipRect;
    }