c# WPF中的TreeView使用详解

在wpf中实现treeview的功能，可能看到很多分享的都是简单的绑定，仅此记录自己完成的功能。

前台

<TreeView x:Name="chapterTree" Grid.Column="0" SelectedItemChanged="chapterTree_SelectedItemChanged" PreviewMouseRightButtonDown="chapterTree_PreviewMouseRightButtonDown" FontSize="14" ItemsSource="{Binding Path=Nodes}" >

<TreeView.ContextMenu>
      <ContextMenu>
       <MenuItem Header="保存" Name="btnAlterData" Click="btnAlterData_Click" />
       <MenuItem Header="新增兄弟节点" Name="btnSaveData" Click="btnSaveData_Click"/>
       <MenuItem Header="新增子节点" Name="btnSaveSonData" Click="btnSaveSonData_Click"/>
       <MenuItem Header="删除" Name="btnDdeleteData" Click="btnDdeleteData_Click"/>
       <MenuItem Header="上移一位" Name="btnUp" Click="btnUp_Click"/>
       <MenuItem Header="下移一位" Name="btnDown" Click="btnDown_Click"/>
      </ContextMenu>
     </TreeView.ContextMenu>
     <TreeView.ItemTemplate>
      <HierarchicalDataTemplate DataType="{x:Type c:OrderModel}" ItemsSource="{Binding Path=ChildNodes}">
       <Label Content="{Binding Path=OrderName}"/>
      </HierarchicalDataTemplate>
     </TreeView.ItemTemplate>
    </TreeView>

后台

CommandModel cm;

public Command()
 {
  InitializeComponent();
  cm = new CommandModel();
  chapterTree.ItemsSource = cm.Nodes;

}

新建了CommandModel页面用来绑定数据（从数据库提取的数据，转换成了list）

public event PropertyChangedEventHandler PropertyChanged;
 private ObservableCollection<OrderModel> nodes = new ObservableCollection<OrderModel>();
 public ObservableCollection<OrderModel> Nodes
 {
  get { return nodes; }
  set
  {
   nodes = value;
   if (PropertyChanged != null)
    PropertyChanged(this, new PropertyChangedEventArgs("Nodes"));
  }
 }

public CommandModel()
 {
  Initiate();
 }
 private void Initiate()
 {
  using (SQLiteConnection con = new SQLiteConnection(MainWindow.sb.ToString()))
  {
   DataTable table = new DataTable("MyTable");
   var reader = con.ExecuteReader("SELECT * FROM OrderData Order by OrderID");
   table.Load(reader);
   ObservableCollection<OrderModel> _nodes = new ObservableCollection<OrderModel>();
   _nodes = ConvertToList(table);

//ShowTreeView();
   Nodes = getChildNodes(0, _nodes);

}
 }

private ObservableCollection<OrderModel> getChildNodes(long parentID, ObservableCollection<OrderModel> nodes)
 {
  List<OrderModel> a = new List<OrderModel>(nodes.Where(x => x.ParentID == parentID).ToList());
  ObservableCollection<OrderModel> mainNodes =new ObservableCollection<OrderModel>(a);
  List<OrderModel> b = new List<OrderModel>(nodes.Where(x => x.ParentID != parentID).ToList());
  ObservableCollection<OrderModel> otherNodes =new ObservableCollection<OrderModel>(b);
  foreach (OrderModel node in mainNodes)
   node.ChildNodes = getChildNodes(node.ID, otherNodes);
  return mainNodes;
 }

#region datatable转list

/// <summary>
 /// datatable转list
 /// </summary>
 /// <param name="dt"></param>
 /// <returns></returns>
 public static ObservableCollection<OrderModel> ConvertToList(DataTable dt)
 {

// 定义集合
  ObservableCollection<OrderModel> ts = new ObservableCollection<OrderModel>();

// 获得此模型的类型
  Type type = typeof(OrderModel);
  //定义一个临时变量
  string tempName = string.Empty;
  //遍历DataTable中所有的数据行
  foreach (DataRow dr in dt.Rows)
  {
   OrderModel t = new OrderModel();
   // 获得此模型的公共属性
   PropertyInfo[] propertys = t.GetType().GetProperties();
   //遍历该对象的所有属性
   foreach (PropertyInfo pi in propertys)
   {
    tempName = pi.Name;//将属性名称赋值给临时变量
    //检查DataTable是否包含此列（列名==对象的属性名）
    if (dt.Columns.Contains(tempName))
    {
     // 判断此属性是否有Setter
     if (!pi.CanWrite) continue;//该属性不可写，直接跳出
     //取值
     object value = dr[tempName];
     //如果非空，则赋给对象的属性
     if (value != DBNull.Value)
      pi.SetValue(t, value, null);
    }
   }
   //对象添加到泛型集合中
   ts.Add(t);
  }

return ts;
 }

#endregion

model页面的列中需要添加

 public ObservableCollection<OrderModel> ChildNodes { get; set; }
 public OrderModel()
 {
  ChildNodes = new ObservableCollection<OrderModel>();
 }

来源：https://www.cnblogs.com/lzwei/archive/2021/03/15/12934308.html