WPF Treeview Binding

Question

Hi Experts,
I would like to populate WPF Treeview with Directory and subdirectories. For that I followed this https://social.msdn.microsoft.com/Forums/vstudio/en-US/bdc74177-0db3-4e9d-9a08-96406eb981a8/wpf-treeview-with-checkboxes?forum=wpf link.
My confusion is how to add Parent Directory and child (sub) directory in this model and populate the treeview.

Can some one please help me here?

Answer 1

Hi, try following demo:

<Window x:Class="WpfApp1.Window48"
        xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
        xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
        xmlns:d="http://schemas.microsoft.com/expression/blend/2008"
        xmlns:mc="http://schemas.openxmlformats.org/markup-compatibility/2006"
        xmlns:local="clr-namespace:WpfApp48"
        mc:Ignorable="d"
        Title="Window48" Height="450" Width="800">
  <Window.DataContext>
    <local:ViewModel/>
  </Window.DataContext>
  <Grid>
    <TreeView ItemsSource="{Binding View}">
      <TreeView.Resources>
        <HierarchicalDataTemplate DataType="{x:Type local:Folder}" ItemsSource="{Binding SubFolders}">
          <TextBlock Text="{Binding Name}"/>
        </HierarchicalDataTemplate>
      </TreeView.Resources>
    </TreeView>
  </Grid>
</Window>

---

using System.Collections.ObjectModel;
using System.ComponentModel;
using System.IO;
using System.Windows;
using System.Windows.Data;
using IO = System.IO;

namespace WpfApp48
{
  public class ViewModel
  {
    public ViewModel()
    {
      string path = @"c:\temp";
      foreach (var dir in Directory.GetDirectories(path)) LoadFolder(dir, col);
      cvs.Source = col;
    }

    private void LoadFolder(string path, ObservableCollection<Folder> col)
    {
      Folder folder = new Folder() { Name = IO.Path.GetFileNameWithoutExtension(path) };
      col.Add(folder);
      foreach (var dir in Directory.GetDirectories(path)) LoadFolder(dir, folder.SubFolders);
    }
    public ICollectionView View { get => cvs.View; }
    private CollectionViewSource cvs = new CollectionViewSource();
    private ObservableCollection<Folder> col = new ObservableCollection<Folder>();
  }

  public class Folder
  {
    public string Name { get; set; }
    public ObservableCollection<Folder> SubFolders { get; set; } = new ObservableCollection<Folder>();
  }
}