WPF中TreeView数据结构解析

XAML.CS代码：

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
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;

namespace TreeViewBindingDemo
{
    /// <summary>
    /// MainWindow.xaml 的交互逻辑
    /// </summary>
    public partial class MainWindow : Window
    {
        List<NodeEntry> m_NodeEntrys;
        List<NodeEntry> m_outputList;
        public MainWindow()
        {
            InitializeComponent();
            m_NodeEntrys = new List<NodeEntry>()   
        {   
            new NodeEntry { ID = 2, Name = "北京市", ParentID = 1 },   
            new NodeEntry { ID = 1, Name = "中国" },   
            new NodeEntry { ID = 3, Name = "吉林省", ParentID = 1 },   
            new NodeEntry { ID = 4, Name = "上海市", ParentID = 1 },   
            new NodeEntry { ID = 5, Name = "海淀区", ParentID = 2 },   
            new NodeEntry { ID = 6, Name = "朝阳区", ParentID = 2 },   
            new NodeEntry { ID = 7, Name = "大兴区", ParentID = 2 },   
            new NodeEntry { ID = 8, Name = "白山市", ParentID = 3 },   
            new NodeEntry { ID = 9, Name = "长春市", ParentID = 3 },   
            new NodeEntry { ID = 10, Name = "抚松县", ParentID = 8 },   
            new NodeEntry { ID = 11, Name = "靖宇县", ParentID = 8 },   
            new NodeEntry { ID = 13, Name = "靖宇县" }   
        };
            m_outputList = Bind(m_NodeEntrys);
            this.treeView1.ItemsSource = m_outputList;
            this.treeView2.ItemsSource = m_outputList;
        }

        private List<NodeEntry> Bind(List<NodeEntry> nodes)
        {
            List<NodeEntry> outputList=new List<NodeEntry>();
            for (int i = 0; i < nodes.Count; i++)
            {
                nodes[i].IsChecked = false;
                if (nodes[i].ParentID == -1)
                {
                    outputList.Add(nodes[i]);
                }
                else
                {
                    FindDownward(nodes,nodes[i].ParentID).NodeEntrys.Add(nodes[i]);
                }
            }
            return outputList;
        }

        private NodeEntry FindDownward(List<NodeEntry> nodes, int id)
        {
            if (nodes == null) return null;
            for (int i = 0; i < nodes.Count; i++)
            {
                if (nodes[i].ID == id)
                {
                    return nodes[i];
                }
            }
            return null;
        }
     
        private void btnOK_Click(object sender, RoutedEventArgs e)
        {
            try
            {
                m_NodeEntrys.Add(new NodeEntry { ID = 14, IsChecked = true, Name = "法国" });
                m_outputList.Add(new NodeEntry { ID = 14, IsChecked = true, Name = "法国" });
                //m_outputList = Bind(m_NodeEntrys);
                NodeEntry node = new NodeEntry();
                this.treeView1.ItemsSource = m_outputList;
                this.treeView2.ItemsSource = null;
                this.treeView2.ItemsSource = m_outputList;
            }
            catch (Exception ex)
            {
            }
        }
        private void btnCancel_Click(object sender, RoutedEventArgs e)
        {

        }

        //双向绑定改名，选择
        private void treeView2_SelectedItemChanged(object sender, RoutedPropertyChangedEventArgs<object> e)
        {
            NodeEntry item = (NodeEntry)this.treeView2.SelectedItem;
            item.Name = "dido";
            item.IsChecked = true;
            MessageBox.Show(item.ID.ToString());
        }
  

    }
}

实体类：

using System.Collections.Generic;
using System.ComponentModel;

namespace TreeViewBindingDemo
{
    public class NodeEntry : INotifyPropertyChanged
    {
        public NodeEntry()
        {
            this.NodeEntrys = new List<NodeEntry>();
            this.ParentID = -1;
            this.IsChecked = true;
        }
        int id;
        public int ID
        {
            get { return id; }
            set { id = value; this.OnPropertyChanged("ID"); }
        }
        string name;
        public string Name
        {
            get { return name; }
            set { name = value; this.OnPropertyChanged("Name"); }
        }
        public int ParentID { get; set; }
        bool isChecked;
        public bool IsChecked
        {
            get { return isChecked; }
            set { isChecked = value; this.OnPropertyChanged("IsChecked"); }
        }
        List<NodeEntry> nodeEntrys;
        public List<NodeEntry> NodeEntrys
        {
            get { return nodeEntrys; }
            set
            {
                nodeEntrys = value;
                this.OnPropertyChanged("NodeEntrys");
            }
        }
        public event PropertyChangedEventHandler PropertyChanged;
        private void OnPropertyChanged(string prop)
        {
            if (this.PropertyChanged != null)
                this.PropertyChanged(this, new PropertyChangedEventArgs(prop));
        }
    }

}

XAML代码：

<Window x:Class="TreeViewBindingDemo.MainWindow"
        xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
        xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
        xmlns:model="clr-namespace:TreeViewBindingDemo"
        Title="MainWindow" Height="350" Width="525">
    <Grid>
        <Grid.Resources>
            <HierarchicalDataTemplate DataType="{x:Type model:NodeEntry}" ItemsSource="{Binding NodeEntrys}">
                <StackPanel Orientation="Horizontal" Margin="0,2,0,2">
                    <CheckBox Focusable="False"        
                              VerticalAlignment="Center" IsChecked="{Binding IsChecked, Mode=TwoWay}"/>
                    <TextBlock Text="{Binding Name}" ToolTip="{Binding Name}" Tag="{Binding ID}"/>
                </StackPanel>
                <HierarchicalDataTemplate.ItemContainerStyle>
                    <Style TargetType="TreeViewItem">
                        <Setter Property="IsExpanded" Value="True" />
                    </Style>
                </HierarchicalDataTemplate.ItemContainerStyle>
            </HierarchicalDataTemplate>
        </Grid.Resources>
        <Grid.ColumnDefinitions>
            <ColumnDefinition MinWidth="100" Width="170*"/>
            <ColumnDefinition Width="1*" />
            <ColumnDefinition Width="80" />
            <ColumnDefinition Width="80" />
        </Grid.ColumnDefinitions>
        <Grid.RowDefinitions>
            <RowDefinition Height="40*" />
            <RowDefinition Height="40" />
        </Grid.RowDefinitions>
        <GridSplitter Grid.Column="1" Grid.RowSpan="5" Name="gridSplitter1" HorizontalAlignment="Stretch" />
        <Button Content="确定" Grid.Column="2" Grid.Row="1" Height="25" HorizontalAlignment="right" Margin="0,10,0,0" Name="btnOK" Click="btnOK_Click" VerticalAlignment="Top" Width="50" IsDefault="True" />
        <Button Content="取消" Grid.Column="3" Grid.Row="1" Height="25" HorizontalAlignment="right" Margin="0,10,10,0" Name="btnCancel" Click="btnCancel_Click" VerticalAlignment="Top" Width="50" IsCancel="True" />
        <TreeView Grid.ColumnSpan="2"  Name="treeView1" >
        </TreeView>
        <TreeView Grid.Column="2" Grid.ColumnSpan="2"  Name="treeView2" SelectedItemChanged="treeView2_SelectedItemChanged">
        </TreeView>
    </Grid>

</Window>