检查FrameworkElement是否有边框

Question

我刚拿到一门课的FrameworkElement学位。是否有可能检查此FrameworkElement是否是具有borderthickness/borderbrush属性的元素？

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var element = myframeworkelement as IHasBorder;
element.borderthickness = new Thickness(1,2,3,4);

真的存在这样的东西吗？

Answer 1

属性BorderThickness和BorderBrush在Control类中定义。

因此，您可以尝试将FrameworkElement转换为Control，如果成功，请设置以下属性：

public partial class Window1 : Window
{
    public Window1()
    {
        InitializeComponent();

        var pnl = new StackPanel();
        this.Content = pnl;

        var button = new Button();
        button.Content = "Hi";

        pnl.Children.Add(button);

        SetBorder(button);
    }

    public void SetBorder(FrameworkElement fe)
    {
        var borderControl = fe as Control;

        if (borderControl != null)
        {
            borderControl.BorderThickness = new Thickness(10);
            borderControl.BorderBrush = Brushes.Red;
        }
    }
}