产品类：
public class Product:NotificationObject { private int productID; public int ProductID { get { return productID; } set { productID = value; this.RaisePropertyChanged(()=>this.ProductID); } } private string productName; public string ProductName { get { return productName; } set { productName = value; RaisePropertyChanged(()=>this.ProductName); } } private double unitPrice; public double UnitPrice { get { return unitPrice; } set { unitPrice = value; this.RaisePropertyChanged(()=>this.UnitPrice); } } private int categoryID; public int CategoryID { get { return categoryID; } set { categoryID = value; RaisePropertyChanged(()=>this.CategoryID); } } } 引用了Microsoft.Practices.Prism.dll，Using了Microsoft.Practices.Prism.ViewModel名称空间，继承NotificationObject类实现更改通知
产品分类的类：
public class Categories:NotificationObject { private int categoryID; public int CategoryID { get { return categoryID; } set { categoryID = value; this.RaisePropertyChanged(()=>this.CategoryID); } } private string categoryName; public string CategoryName { get { return categoryName; } set { categoryName = value; this.RaisePropertyChanged(()=>this.CategoryName); } } private string description; public string Description { get { return description; } set { description = value; this.RaisePropertyChanged(()=>this.Description); } } } 后台代码：
using System;using System.Collections.Generic;using System.Linq;using System.Text;using System.Windows;using System.Windows.Controls;using System.Windows.Data;using System.Windows.Documents;using System.Windows.Input;using System.Windows.Media;using System.Windows.Media.Imaging;using System.Windows.Navigation;using System.Windows.Shapes;using System.Collections.ObjectModel;using BingingComboBox.Models;using System.ComponentModel;namespace BingingComboBox{ /// /// MainWindow.xaml 的交互逻辑 /// public partial class MainWindow : Window, INotifyPropertyChanged { //实现INotifyPropertyChanged接口（更改通知） public event PropertyChangedEventHandler PropertyChanged; public void RaisePropertyChanged(string propName) { if (this.PropertyChanged != null) { this.PropertyChanged.Invoke(this, new PropertyChangedEventArgs(propName)); } } private Product selectedProduct; //listBox选中项 public Product SelectedProduct { get { return selectedProduct; } set { selectedProduct = value; RaisePropertyChanged("SelectedProduct"); } } //产品类别集合初始化 private ObservableCollection categoryList = new ObservableCollection { new Categories{ CategoryID=1,CategoryName="Beverages",Description="Soft drinks, coffees, teas, beers, and ales"}, new Categories{ CategoryID=2,CategoryName="Condiments",Description="Sweet and savory sauces, relishes, spreads, and seasonings"}, new Categories{ CategoryID=3,CategoryName="Confections",Description="Desserts, candies, and sweet breads"}, new Categories{ CategoryID=4,CategoryName="Dairy Products",Description="Cheeses"}, new Categories{ CategoryID=5,CategoryName="Grains/Cereals",Description="Breads, crackers, pasta, and cereal"}, new Categories{ CategoryID=6,CategoryName="Meat/Poultry",Description="Prepared meats"}, new Categories{ CategoryID=7,CategoryName="Produce",Description="Dried fruit and bean curd"}, new Categories{ CategoryID= 8,CategoryName="Seafood",Description="Seaweed and fish"} }; private ObservableCollection productListList; /// /// 产品集合 /// public ObservableCollection ProductList { get { if (productListList == null) { productListList = new ObservableCollection (); } return productListList; } set { productListList = value; } } public MainWindow() { InitializeComponent(); CollectionViewSource categoriesTypeViewSource = (CollectionViewSource)this.FindResource("categoriesTypeViewSource"); categoriesTypeViewSource.Source = categoryList;//用于绑定产品类别的ComboBox的ItemSource CollectionViewSource productsViewSource = (CollectionViewSource)this.FindResource("productsViewSource"); productsViewSource.Source = GetProducts();//用于绑定产品列表ListBox的ItemSource } /// /// 返回产品列表 /// /// GetProducts() { ObservableCollection productList = new ObservableCollection () { new Product{ProductID=1,ProductName="Chai",UnitPrice=18.00,CategoryID=1}, new Product{ProductID=2,ProductName="Aniseed Syrup",UnitPrice=10.00,CategoryID=2}, new Product{ProductID=3,ProductName="Teatime Chocolate Biscuits", UnitPrice=18.00,CategoryID=3}, new Product{ProductID=4,ProductName="Raclette Courdavault", UnitPrice=25, CategoryID=4}, new Product{ProductID=5,ProductName="Ravioli Angelo", UnitPrice=55,CategoryID=5}, }; return productList; } /// /// 弹出框显示产品列表选中项（产品）的信息，用来验证下拉产品分类comboBox， /// 更改产品分类时，产品列表选中项的产品分类id是否改变 /// /// /// private void Button_Click(object sender, RoutedEventArgs e) { if (lbProducts.SelectedIndex > -1 && lbProducts.SelectedItem != null) { Product p = lbProducts.SelectedItem as Product; string msg = string.Format("选中的产品{0}：的单价为{1},类别id为：{2}", p.ProductName, p.UnitPrice, p.CategoryID); MessageBox.Show(msg); } } }} 
点击“Show”按钮，show出初始值：
下拉产品分类下拉框ComboBox:
点击“Show”按钮，弹出修改后的信息，产品分类id改变：
