WPF中TreeView数据结构解析

XAML.CS代码：

  1 using System;

  2 using System.Collections.Generic;

  3 using System.Linq;

  4 using System.Text;

  5 using System.Threading.Tasks;

  6 using System.Windows;

  7 using System.Windows.Controls;

  8 using System.Windows.Data;

  9 using System.Windows.Documents;

 10 using System.Windows.Input;

 11 using System.Windows.Media;

 12 using System.Windows.Media.Imaging;

 13 using System.Windows.Navigation;

 14 using System.Windows.Shapes;

 15 

 16 namespace TreeViewBindingDemo

 17 {

 18     /// <summary>

 19     /// MainWindow.xaml 的交互逻辑

 20     /// </summary>

 21     public partial class MainWindow : Window

 22     {

 23         List<NodeEntry> m_NodeEntrys;

 24         List<NodeEntry> m_outputList;

 25         public MainWindow()

 26         {

 27             InitializeComponent();

 28             m_NodeEntrys = new List<NodeEntry>()   

 29         {   

 30             new NodeEntry { ID = 2, Name = "北京市", ParentID = 1 },   

 31             new NodeEntry { ID = 1, Name = "中国" },   

 32             new NodeEntry { ID = 3, Name = "吉林省", ParentID = 1 },   

 33             new NodeEntry { ID = 4, Name = "上海市", ParentID = 1 },   

 34             new NodeEntry { ID = 5, Name = "海淀区", ParentID = 2 },   

 35             new NodeEntry { ID = 6, Name = "朝阳区", ParentID = 2 },   

 36             new NodeEntry { ID = 7, Name = "大兴区", ParentID = 2 },   

 37             new NodeEntry { ID = 8, Name = "白山市", ParentID = 3 },   

 38             new NodeEntry { ID = 9, Name = "长春市", ParentID = 3 },   

 39             new NodeEntry { ID = 10, Name = "抚松县", ParentID = 8 },   

 40             new NodeEntry { ID = 11, Name = "靖宇县", ParentID = 8 },   

 41             new NodeEntry { ID = 13, Name = "靖宇县" }   

 42         };

 43             m_outputList = Bind(m_NodeEntrys);

 44             this.treeView1.ItemsSource = m_outputList;

 45             this.treeView2.ItemsSource = m_outputList;

 46         }

 47 

 48         private List<NodeEntry> Bind(List<NodeEntry> nodes)

 49         {

 50             List<NodeEntry> outputList=new List<NodeEntry>();

 51             for (int i = 0; i < nodes.Count; i++)

 52             {

 53                 nodes[i].IsChecked = false;

 54                 if (nodes[i].ParentID == -1)

 55                 {

 56                     outputList.Add(nodes[i]);

 57                 }

 58                 else

 59                 {

 60                     FindDownward(nodes,nodes[i].ParentID).NodeEntrys.Add(nodes[i]);

 61                 }

 62             }

 63             return outputList;

 64         }

 65 

 66         private NodeEntry FindDownward(List<NodeEntry> nodes, int id)

 67         {

 68             if (nodes == null) return null;

 69             for (int i = 0; i < nodes.Count; i++)

 70             {

 71                 if (nodes[i].ID == id)

 72                 {

 73                     return nodes[i];

 74                 }

 75             }

 76             return null;

 77         }

 78      

 79         private void btnOK_Click(object sender, RoutedEventArgs e)

 80         {

 81             try

 82             {

 83                 m_NodeEntrys.Add(new NodeEntry { ID = 14, IsChecked = true, Name = "法国" });

 84                 m_outputList.Add(new NodeEntry { ID = 14, IsChecked = true, Name = "法国" });

 85                 //m_outputList = Bind(m_NodeEntrys);

 86                 NodeEntry node = new NodeEntry();

 87                 this.treeView1.ItemsSource = m_outputList;

 88                 this.treeView2.ItemsSource = null;

 89                 this.treeView2.ItemsSource = m_outputList;

 90             }

 91             catch (Exception ex)

 92             {

 93             }

 94         }

 95         private void btnCancel_Click(object sender, RoutedEventArgs e)

 96         {

 97 

 98         }

 99 

100         //双向绑定改名，选择

101         private void treeView2_SelectedItemChanged(object sender, RoutedPropertyChangedEventArgs<object> e)

102         {

103             NodeEntry item = (NodeEntry)this.treeView2.SelectedItem;

104             item.Name = "dido";

105             item.IsChecked = true;

106             MessageBox.Show(item.ID.ToString());

107         }

108   

109 

110     }

111 }

View Code

实体类：

 1 using System.Collections.Generic;

 2 using System.ComponentModel;

 3 

 4 namespace TreeViewBindingDemo

 5 {

 6     public class NodeEntry : INotifyPropertyChanged

 7     {

 8         public NodeEntry()

 9         {

10             this.NodeEntrys = new List<NodeEntry>();

11             this.ParentID = -1;

12             this.IsChecked = true;

13         }

14         int id;

15         public int ID

16         {

17             get { return id; }

18             set { id = value; this.OnPropertyChanged("ID"); }

19         }

20         string name;

21         public string Name

22         {

23             get { return name; }

24             set { name = value; this.OnPropertyChanged("Name"); }

25         }

26         public int ParentID { get; set; }

27         bool isChecked;

28         public bool IsChecked

29         {

30             get { return isChecked; }

31             set { isChecked = value; this.OnPropertyChanged("IsChecked"); }

32         }

33         List<NodeEntry> nodeEntrys;

34         public List<NodeEntry> NodeEntrys

35         {

36             get { return nodeEntrys; }

37             set

38             {

39                 nodeEntrys = value;

40                 this.OnPropertyChanged("NodeEntrys");

41             }

42         }

43         public event PropertyChangedEventHandler PropertyChanged;

44         private void OnPropertyChanged(string prop)

45         {

46             if (this.PropertyChanged != null)

47                 this.PropertyChanged(this, new PropertyChangedEventArgs(prop));

48         }

49     }

50 

51 }

View Code

XAML代码：

 1 <Window x:Class="TreeViewBindingDemo.MainWindow"

 2         xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"

 3         xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"

 4         xmlns:model="clr-namespace:TreeViewBindingDemo"

 5         Title="MainWindow" Height="350" Width="525">

 6     <Grid>

 7         <Grid.Resources>

 8             <HierarchicalDataTemplate DataType="{x:Type model:NodeEntry}" ItemsSource="{Binding NodeEntrys}">

 9                 <StackPanel Orientation="Horizontal" Margin="0,2,0,2">

10                     <CheckBox Focusable="False"        

11                               VerticalAlignment="Center" IsChecked="{Binding IsChecked, Mode=TwoWay}"/>

12                     <TextBlock Text="{Binding Name}" ToolTip="{Binding Name}" Tag="{Binding ID}"/>

13                 </StackPanel>

14                 <HierarchicalDataTemplate.ItemContainerStyle>

15                     <Style TargetType="TreeViewItem">

16                         <Setter Property="IsExpanded" Value="True" />

17                     </Style>

18                 </HierarchicalDataTemplate.ItemContainerStyle>

19             </HierarchicalDataTemplate>

20         </Grid.Resources>

21         <Grid.ColumnDefinitions>

22             <ColumnDefinition MinWidth="100" Width="170*"/>

23             <ColumnDefinition Width="1*" />

24             <ColumnDefinition Width="80" />

25             <ColumnDefinition Width="80" />

26         </Grid.ColumnDefinitions>

27         <Grid.RowDefinitions>

28             <RowDefinition Height="40*" />

29             <RowDefinition Height="40" />

30         </Grid.RowDefinitions>

31         <GridSplitter Grid.Column="1" Grid.RowSpan="5" Name="gridSplitter1" HorizontalAlignment="Stretch" />

32         <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" />

33         <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" />

34         <TreeView Grid.ColumnSpan="2"  Name="treeView1" >

35         </TreeView>

36         <TreeView Grid.Column="2" Grid.ColumnSpan="2"  Name="treeView2" SelectedItemChanged="treeView2_SelectedItemChanged">

37         </TreeView>

38     </Grid>

39 

40 </Window>

View Code