我有一个动态加载图的需求（XAML，包括自定义UserControl，ScrewControl）。
我正在研究从ViewModel类绑定ScrewControl的依赖属性（Status）的方法。挑战在于，一个图可能包含不同数量的ScrewControl，每个ScrewControl都需要绑定到ViewModel中的字典或集合。
我已经解决了使用XamlReader动态加载XAML的第一个挑战，但不确定如何将ScrewControl与ViewModel中的Collection/dictionary绑定。
视图模型类

public class AssemblyViewModel
{
    public Dictionary<int, ScrewStatus> Screws { get; set; }
    public FrameworkElement Image { get; set; }

    ...
}

视图类

public partial class AssemblyView : UserControl
{
    private AssemblyViewModel viewModel;

    public AssemblyView(AssemblyViewModel viewModel)
    {
        InitializeComponent();
        DataContext = this.viewModel = viewModel;

        Loaded += OnLoaded;
    }

    public FrameworkElement XamlContent
    {
        get { return (FrameworkElement)GetValue(XamlContentProperty); }
        set { SetValue(XamlContentProperty, value); }
    }

    // Using a DependencyProperty as the backing store for Content.  This enables animation, styling, binding, etc...
    public static readonly DependencyProperty XamlContentProperty =
        DependencyProperty.Register("XamlContent", typeof(FrameworkElement), typeof(AssemblyView), new PropertyMetadata(null, OnXamlChanged));

    private static void OnXamlChanged(DependencyObject dependencyObject, DependencyPropertyChangedEventArgs args)
    {
        var view = dependencyObject as AssemblyView;
        var element = args.NewValue as FrameworkElement;
        if (null != element)
        {
            view.ContentControl.Children.RemoveRange(0, 1);
            view.ContentControl.Children.Add(element);

            var screws = element.FindChildren<Screw>();

            try
            {
                foreach (var screw in screws)
                {
                    // The ScrewControl has a name properties like "Screw_1", 1 is used as the key of the dictionary and Status as the Value
                    var parts = screw.Name.Split(new char[] { '_' }, StringSplitOptions.RemoveEmptyEntries);
                    if (2 == parts.Length)
                    {
                        BindingOperations.SetBinding(
                            screw,
                            Screw.ScrewStatusProperty,
                            new Binding(/*not sure what goes here*/)
                            {
                                Source = view.viewModel.Screws,
                            });
                    }
                }
            }
            catch (Exception e)
            {
                throw;
            }
        }
    }

    private void OnLoaded(object sender, RoutedEventArgs e)
    {

        // This works and loads the diagram 
        BindingOperations.SetBinding(
            this,
            XamlContentProperty,
            new Binding("Image")
            {
                Source = this.viewModel
            });
    }