WPF Tree List - Load Nodes Asynchronously Without Locking the Application's UI

This example creates the asynchronous child nodes selector and fetches child nodes in a background thread. During the fetch operation, parent nodes display a loading indicator and the TreeListView remains responsive to user actions.

Files to Review

• MainWindow.xaml (VB: MainWindow.xaml)
• AsyncChildNodesSelector.cs (VB: AsyncChildNodesSelector.vb)
• ViewModel.cs (VB: ViewModel.vb)

Documentation

• Fetch Nodes Asynchronously
• IAsyncChildNodesSelector

More Examples

• WPF Tree List - Use the Child Nodes Selector to Create a Hierarchical Data Structure
• WPF Tree List - Implement the Child Nodes Path
• WPF Tree List - Use the Hierarchical Data Template to Build a Tree

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