<Window x:Class="demo.BoundTreeView"        xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"        xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"        Title="BoundTreeView" Height="300" Width="300"        xmlns:data="clr-namespace:StoreDatabase;assembly=StoreDatabase"    >    <Grid>        <TreeView Name="treeCategories" Margin="5">            <TreeView.ItemTemplate>                <!--HierarchicalDataTemplate显示第一层控制代码ItemsSource，ItemsSource绑定到一对多的多段-->                <HierarchicalDataTemplate ItemsSource="{Binding Path=Products}">                    <StackPanel Orientation="Horizontal">                        <CheckBox></CheckBox>                        <Image Source="/demo;component/Images/Chrysanthemum.jpg" Width="10" Height="10"></Image>                        <TextBlock Text="{Binding Path=CategoryName}"></TextBlock>                    </StackPanel>                    <!--第二层控制代码-->                    <HierarchicalDataTemplate.ItemTemplate>                        <DataTemplate>                            <StackPanel Orientation="Horizontal">                                <CheckBox></CheckBox>                                <Image Source="/demo;component/Images/Chrysanthemum.jpg" Width="10" Height="10"></Image>                                <TextBlock Text="{Binding Path=ModelName}"></TextBlock>                                <Image Source="/demo;component/Images/Chrysanthemum.jpg" Width="10" Height="10"></Image>                            </StackPanel>                                                    </DataTemplate>                    </HierarchicalDataTemplate.ItemTemplate>                </HierarchicalDataTemplate>            </TreeView.ItemTemplate>        </TreeView>    </Grid></Window>

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.Shapes;namespace demo{    /// <summary>    /// BoundTreeView.xaml 的交互逻辑    /// </summary>    public partial class BoundTreeView : Window    {        public BoundTreeView()        {            InitializeComponent();            treeCategories.ItemsSource = App.StoreDb.GetCategoriesAndProducts();        }    }}

using System;using System.Collections.Generic;using System.Linq;using System.Text;using System.Data;using System.Data.SqlClient;using System.Collections.ObjectModel;namespace StoreDatabase{    public class StoreDB    {        private string connectionString = StoreDatabase.Properties.Settings.Default.Store;                public ICollection<Product> GetProducts()        {            SqlConnection con = new SqlConnection(connectionString);            SqlCommand cmd = new SqlCommand("GetProducts", con);            cmd.CommandType = CommandType.StoredProcedure;            ObservableCollection<Product> products = new ObservableCollection<Product>();            try            {                con.Open();                SqlDataReader reader = cmd.ExecuteReader();                while (reader.Read())                {                    // Create a Product object that wraps the                     // current record.                    Product product = new Product((string)reader["ModelNumber"],                        (string)reader["ModelName"], (decimal)reader["UnitCost"],                        (string)reader["Description"], (int)reader["ProductID"],                        (string)reader["CategoryName"], (string)reader["ProductImage"]);                    // Add to collection                    products.Add(product);                }            }            finally            {                con.Close();            }            return products;        }        public ICollection<Category> GetCategoriesAndProducts()        {            SqlConnection con = new SqlConnection(connectionString);            SqlCommand cmd = new SqlCommand("GetProducts", con);            cmd.CommandType = CommandType.StoredProcedure;            SqlDataAdapter adapter = new SqlDataAdapter(cmd);            DataSet ds = new DataSet();            adapter.Fill(ds, "Products");            cmd.CommandText = "GetCategories";            adapter.Fill(ds, "Categories");            // Set up a relation between these tables (optional).            DataRelation relCategoryProduct = new DataRelation("CategoryProduct",              ds.Tables["Categories"].Columns["CategoryID"],              ds.Tables["Products"].Columns["CategoryID"]);            ds.Relations.Add(relCategoryProduct);            ObservableCollection<Category> categories = new ObservableCollection<Category>();            foreach (DataRow categoryRow in ds.Tables["Categories"].Rows)            {                ObservableCollection<Product> products = new ObservableCollection<Product>();                foreach (DataRow productRow in categoryRow.GetChildRows(relCategoryProduct))                {                    products.Add(new Product(productRow["ModelNumber"].ToString(),                        productRow["ModelName"].ToString(), (decimal)productRow["UnitCost"],                        productRow["Description"].ToString()));                }                categories.Add(new Category(categoryRow["CategoryName"].ToString(), products));            }            return categories;        }    }}

using System;using System.Collections.Generic;using System.Text;using System.Collections.ObjectModel;using System.ComponentModel;namespace StoreDatabase{    public class Category : INotifyPropertyChanged    {        private string categoryName;        public string CategoryName        {            get { return categoryName; }            set            {                categoryName = value;                OnPropertyChanged(new PropertyChangedEventArgs("CategoryName"));            }        }               private ObservableCollection<Product> products;        public ObservableCollection<Product> Products        {            get { return products; }            set             {                products = value;                OnPropertyChanged(new PropertyChangedEventArgs("Products"));            }        }        public event PropertyChangedEventHandler PropertyChanged;        public void OnPropertyChanged(PropertyChangedEventArgs e)        {            if (PropertyChanged != null)                PropertyChanged(this, e);        }        public Category(string categoryName, ObservableCollection<Product> products)        {            CategoryName = categoryName;            Products = products;        }    }}

using System;using System.Collections.Generic;using System.Linq;using System.Text;using System.ComponentModel;namespace StoreDatabase{    public class Product : INotifyPropertyChanged    {        private string modelNumber;        public string ModelNumber        {            get { return modelNumber; }            set            {                modelNumber = value;                OnPropertyChanged(new PropertyChangedEventArgs("ModelNumber"));            }        }        private string modelName;        public string ModelName        {            get { return modelName; }            set            {                modelName = value;                OnPropertyChanged(new PropertyChangedEventArgs("ModelName"));            }        }        private decimal unitCost;        public decimal UnitCost        {            get { return unitCost; }            set            {                unitCost = value;                OnPropertyChanged(new PropertyChangedEventArgs("UnitCost"));            }        }        private string description;        public string Description        {            get { return description; }            set            {                description = value;                OnPropertyChanged(new PropertyChangedEventArgs("Description"));            }        }        private string categoryName;        public string CategoryName        {            get { return categoryName; }            set { categoryName = value; }        }        // For DataGridComboBoxColumn example.        private int categoryID;        public int CategoryID        {            get { return categoryID; }            set { categoryID = value; }        }        private string productImagePath;        public string ProductImagePath        {            get { return productImagePath; }            set { productImagePath = value; }        }        public Product(string modelNumber, string modelName,            decimal unitCost, string description)        {            ModelNumber = modelNumber;            ModelName = modelName;            UnitCost = unitCost;            Description = description;        }        public Product(string modelNumber, string modelName,           decimal unitCost, string description,           string productImagePath)            :           this(modelNumber, modelName, unitCost, description)        {            ProductImagePath = productImagePath;        }        public Product(string modelNumber, string modelName,            decimal unitCost, string description, int categoryID,            string categoryName, string productImagePath) :            this(modelNumber, modelName, unitCost, description)        {            CategoryName = categoryName;            ProductImagePath = productImagePath;            CategoryID = categoryID;        }        public override string ToString()        {            return ModelName + " (" + ModelNumber + ")";        }        public event PropertyChangedEventHandler PropertyChanged;        public void OnPropertyChanged(PropertyChangedEventArgs e)        {            if (PropertyChanged != null)                PropertyChanged(this, e);        }        // This for testing date editing. The value isn‘t actually stored in the database.        private DateTime dateAdded = DateTime.Today;        public DateTime DateAdded        {            get { return dateAdded; }            set { dateAdded = value; }        }    }}

create PROCEDURE [dbo].[GetCategories] ASSELECT * FROM Categoriescreate PROCEDURE [dbo].[GetProducts] ASSELECT * FROM Products INNER JOIN Categories ON Products.CategoryID = Categories.CategoryID