TreeView
The
TreeView is a control that presents hierarchical tree data and allows selection of it.One example for populating a
TreeView can be from a directory on the computer. You can create a TreeView in the MainWindow.axaml file in an Avalonia MVVM project.<TreeView Items="{Binding Items}"
Width="400" Height="480"
HorizontalAlignment="Left">
<TreeView.ItemTemplate>
<TreeDataTemplate ItemsSource="{Binding Subfolders}">
<TextBlock Text="{Binding strNodeText}"/>
</TreeDataTemplate>
</TreeView.ItemTemplate>
</TreeView>
In the
MainWindowViewModel.cs you can add this code which will recursively look up all the subfolders and populate the TreeView from Items and Subfolderspublic ObservableCollection<Node> Items { get; }
public ObservableCollection<Node> SelectedItems { get; }
public string strFolder { get; set; }
public MainWindowViewModel()
{
strFolder = @"C:\Users\hooty\Desktop"; // EDIT THIS FOR AN EXISTING FOLDER
Items = new ObservableCollection<Node>();
Node rootNode = new Node(strFolder);
rootNode.Subfolders = GetSubfolders(strFolder);
Items.Add(rootNode);
}
public ObservableCollection<Node> GetSubfolders(string strPath)
{
ObservableCollection<Node> subfolders = new ObservableCollection<Node>();
string[] subdirs = Directory.GetDirectories(strPath, "*", SearchOption.TopDirectoryOnly);
foreach (string dir in subdirs)
{
Node thisnode = new Node(dir);
if (Directory.GetDirectories(dir, "*", SearchOption.TopDirectoryOnly).Length > 0)
{
thisnode.Subfolders = new ObservableCollection<Node>();
thisnode.Subfolders = GetSubfolders(dir);
}
subfolders.Add(thisnode);
}
return subfolders;
}
public class Node
{
public ObservableCollection<Node> Subfolders { get; set; }
public string strNodeText { get; }
public string strFullPath { get; }
public Node(string _strFullPath)
{
strFullPath = _strFullPath;
strNodeText = Path.GetFileName(_strFullPath);
}
}
Last modified 8mo ago