Wpf TreeView demo

xaml:

<Window x:Class="TreeViewDemo.MainWindow"
        xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
        xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
        Title="MainWindow" Height="550" Width="825"
        xmlns:local="clr-namespace:TreeViewDemo">
    <Window.Resources>
        <HierarchicalDataTemplate DataType="{x:Type local:Folder}" ItemsSource="{Binding SubFolders}">
            <TextBlock Text="{Binding Name}"/>
        </HierarchicalDataTemplate>
    </Window.Resources>
    <Grid>
        <TreeView ItemsSource="{x:Static local:Data.Folders}" />
    </Grid>
</Window>

cs:

namespace TreeViewDemo
{
    /// <summary>
    /// Interaction logic for MainWindow.xaml
    /// </summary>
    public partial class MainWindow : Window
    {
        public MainWindow()
        {
            InitializeComponent();
        }
    }

    public static class Data
    {
        private const string RootFolder = @"F:\";

        public static IEnumerable<Folder> Folders
        {
            get
            {
                return new List<Folder>() 
                { 
                    new Folder() 
                    { 
                        Name = RootFolder, 
                        SubFolders = EnumerateDirectories(RootFolder)
                    } 
                };
            }
        }

        private static IEnumerable<Folder> EnumerateDirectories(string directory)
        {
            var folders = new List<Folder>();
            try
            {
                foreach (var dir in Directory.EnumerateDirectories(directory))
                {
                    var folder = new Folder() { Name = new DirectoryInfo(dir).Name, SubFolders = EnumerateDirectories(dir) };
                    folders.Add(folder);
                }

                return folders;
            }
            catch (UnauthorizedAccessException)
            {
                return null;
            }
        }
    }

    public class Folder
    {
        public IEnumerable<Folder> SubFolders { get; set; }
        public string Name { get; set; }
    }
}

 source code can be downloaded at: https://files.cnblogs.com/bear831204/TreeViewDemo.zip