把潜在的树形结构数据转换成树形结构数据

 

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

转换代码：

  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             new NodeEntry { ID = 14, Name = "无名村", ParentID = 13 },   

 43         };

 44             m_outputList = Bind(m_NodeEntrys);

 45             this.treeView1.ItemsSource = m_outputList;

 46             this.treeView2.ItemsSource = m_outputList;

 47         }

 48 

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

 50         {

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

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

 53             {

 54                 nodes[i].IsChecked = false;

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

 56                 {

 57                     outputList.Add(nodes[i]);

 58                 }

 59                 else

 60                 {

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

 62                 }

 63             }

 64             return outputList;

 65         }

 66 

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

 68         {

 69             if (nodes == null) return null;

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

 71             {

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

 73                 {

 74                     return nodes[i];

 75                 }

 76             }

 77             return null;

 78         }

 79      

 80         private void btnOK_Click(object sender, RoutedEventArgs e)

 81         {

 82             try

 83             {

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

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

 86                 //m_outputList = Bind(m_NodeEntrys);

 87                 NodeEntry node = new NodeEntry();

 88                 this.treeView1.ItemsSource = m_outputList;

 89                 this.treeView2.ItemsSource = null;

 90                 this.treeView2.ItemsSource = m_outputList;

 91             }

 92             catch (Exception ex)

 93             {

 94             }

 95         }

 96         private void btnCancel_Click(object sender, RoutedEventArgs e)

 97         {

 98 

 99         }

100 

101         //双向绑定改名，选择

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

103         {

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

105             item.Name = "dido";

106             item.IsChecked = true;

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

108         }

109   

110 

111     }

112 }

View Code