WPF 下实现两个ComboBox的MasterDetail 级联 联动 绑定

要绑定的数据结构如下，一个Category包含多个SubCategory：

public class Category
    {
        public string Name { get; set; }
        public ObservableCollection<SubCategory> SubCategories { get; set; }
    }

    public class SubCategory
    {
        public int Id { get; set; }
        public string SubCategoryName { get; set; }
    }

Code-behind初始化测试数据：

View Code 

    public partial class AssetEditor : Window
    {
        public ObservableCollection<Category> CategorieCollection { get; set; }

        public AssetEditor()
        {
            InitializeComponent();
            CategorieCollection = new ObservableCollection<Category>();
            CategorieCollection.Add(new Category()
            {
                Name = "Cate1",
                SubCategories = new ObservableCollection<SubCategory>()
            });

            CategorieCollection.Add(new Category()
            {
                Name = "Cate2",
                SubCategories = new ObservableCollection<SubCategory>()
            });
            CategorieCollection[0].SubCategories.Add(new SubCategory()
            {
                Id = 0,
                SubCategoryName = "sub1"
            });
            CategorieCollection[1].SubCategories.Add(new SubCategory()
            {
                Id = 0,
                SubCategoryName = "sub2"
            });

            cmbCategoryName.DataContext = CategorieCollection;
        }
    }

XAML里绑定：

<ComboBox Grid.Row="0" Grid.ColumnSpan="2" Grid.Column="1" Name="cmbCategoryName" 
                      ItemsSource="{Binding}" 
                      DisplayMemberPath="Name" 
                      SelectedValuePath="Name" 
                      SelectedItem="{Binding Path=SubCategories}" />
            
            <ComboBox Grid.Row="0" Grid.Column="5" Grid.ColumnSpan="3" Name="cmbSubCategory"
             DataContext="{Binding ElementName=cmbCategoryName,Path=SelectedItem,Mode=OneWay}" 
                      ItemsSource="{Binding Path=SubCategories, Mode=OneWay}" 
                      DisplayMemberPath="SubCategoryName" 
                      SelectedValuePath="Id" />

来源:http://www.cnblogs.com/polymorphism/archive/2013/01/20/WPF_ComboBox_Master-Detail_Binding.html 多谢~