TreeView控件

数据结构：

private int _id;
        private string _name;
        private int _parentId;
        private Tree _parent;
        private List<Tree> _children = new List<Tree>();

        public int Id
        {
            get { return _id; }
            set { _id = value; }
        }

        public string Name
        {
            get { return _name; }
            set { _name = value; }
        }

        public int ParentId
        {
            get { return _parentId; }
            set { _parentId = value; }
        }

        public Tree Parent
        {
            get { return _parent; }
            set { _parent = value; }
        }

        public List<Tree> Children
        {
            get { return _children; }
            set { _children = value; }
        }

xaml:

<Window.Resources>
        <HierarchicalDataTemplate x:Key="CustomTemplate" ItemsSource="{Binding Children}">
            <TextBlock Text="{Binding Name}" />
        </HierarchicalDataTemplate>
    </Window.Resources>    
    <Grid>
        <TreeView Height="200" HorizontalAlignment="Left" Margin="10,10,0,0" Name="treeView1" VerticalAlignment="Top" Width="120" ItemTemplate="{StaticResource CustomTemplate}" />
    </Grid>

cs:

private void SecondPage_Loaded(object sender, RoutedEventArgs e)
        {
            treeView1.ItemsSource = InitTreeView();
        }
        private List<Tree> InitTreeView()
        {
            List<Tree> rootList = new List<Tree>();
            var list = _dbModel.Tree.ToList();
            foreach (var i1 in list)
            {
                if (i1.ParentID == 0)
                    rootList.Add(i1);
                else
                {
                    foreach (var i2 in list)
                    {
                        if (i2.ID == i1.ParentID)
                        {
                            i1.Parent = i2;
                            i2.Children.Add(i1);
                        }
                    }
                }
            }
            return rootList;
        }