WPF日积月累之TreeView动态绑定
一、概述
本文演示了如何递归生成数据，用于绑定TreeView以及TreeItem的双击事件。
二、参考代码
1 using System;
2 using System.Collections.Generic;
3 using System.ComponentModel;
4 using System.Linq;
5 using System.Windows;
6 using System.Windows.Controls;
7 using System.Windows.Input;
8
9 namespace BindingDemo6TreeBinding
10 {
11
12 ///
15 public partial class MainWindow : Window
16 {
17 public MainWindow()
18 {
19 InitializeComponent();
20
21 #region 用于绑定的数据
22 List
23 new TreeItem(){ID=0,ItemName="Root", ParentId = -1,IsExpanded=true},//设置初始状态为展开状态
24
25 new TreeItem(){ID=1,ItemName="Item1",ParentId=0},
26 new TreeItem(){ID=2,ItemName="Item1-1",ParentId=1},
27 new TreeItem(){ID=3,ItemName="Item1-2",ParentId=1},
28 new TreeItem(){ID=4,ItemName="Item1-3",ParentId=1},
29
30 new TreeItem(){ID=5,ItemName="Item1-3-1",ParentId=4},
31 new TreeItem(){ID=6,ItemName="Item1-3-2",ParentId=4},
32
33
34
35 new TreeItem(){ID=7,ItemName="Item2",ParentId=0},
36 new TreeItem(){ID=8,ItemName="Item2-1",ParentId=7},
37 new TreeItem(){ID=9,ItemName="Item2-2",ParentId=7},
38
39 new TreeItem(){ID=10,ItemName="Item3",ParentId=0}
40 };
41 #endregion
42
43 this.cmbGoup.ItemsSource = grpLst;//comboBox数据源
44 this.cmbGoup.SelectedValuePath = "ID";
45 this.cmbGoup.DisplayMemberPath = "ItemName";
46
47 List
48 this.tvGroup.ItemsSource = lstGroup;//数据绑定
49 }
50 ///
53 ///
54 ///
55 public List
56 {
57 List
58 List
59 foreach (TreeItem grp in mainNodes)
60 {
61 grp.ChildrenItems = getTreeData(grp.ID, otherNodes);
62 }
63 return mainNodes;
64 }
65
66 ///
69 ///
70 ///
71 private void cmbGoup_DropDownClosed(object sender, EventArgs e)
72 {
73 if (this.cmbGoup.SelectedValue == null)
74 {
75 return;
76 }
77 int groupId = (int)this.cmbGoup.SelectedValue;//选中的组号
78 List
79 this.tvGroup.ItemsSource = lstGroup;
80 }
81
82
83 private void tvDomain_MouseDoubleClick(object sender, MouseButtonEventArgs e)
84 {
85 TreeViewItem trvItem = sender as TreeViewItem;
86 if(trvItem.IsSelected)
87 {
88 TreeItem selectedItem = (TreeItem)(this.tvGroup.SelectedItem);
89 MessageBox.Show(selectedItem.ItemName);
90 }
91 }
92 }
93 public class TreeItem:ViewModelBase
94 {
95 public TreeItem()
96 {
97 this.ChildrenItems = new List
98 this.ParentId = 0;//主节点的父id默认为0
99 }
100
101 public List
102 public int ID { get; set; }//id
103 public int ParentId { get; set; }//parentID
104 public string ItemName { get; set; }
105
106 private bool isExpanded;
107 public bool IsExpanded { get { return isExpanded; } set { isExpanded = value;
108 OnPropertyChanged(nameof(IsExpanded));
109 } }
110
111
112 private bool isSelected;
113 public bool IsSelected
114 {
115 get { return isSelected; }
116 set
117 {
118 isSelected = value;
119 OnPropertyChanged(nameof(IsSelected));
120 }
121 }
122
123
124
125
126 }
127 public abstract class ViewModelBase : INotifyPropertyChanged, IDisposable
128 {
129 public virtual string DisplayName { get; set; }
130
131 public event PropertyChangedEventHandler PropertyChanged;
132
133 protected void OnPropertyChanged(string propertyName)
134 {
135 PropertyChangedEventHandler handler = PropertyChanged;
136
137 if (handler != null)
138 {
139 handler(this, new PropertyChangedEventArgs(propertyName));
140 }
141 }
142
143
144 #region IDisposable Members
145
146 public void Dispose()
147 {
148 this.OnDispose();
149
150 }
151
152 protected virtual void OnDispose()
153 {
154 }
155
156 #endregion
157 }
158 }
1
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