#TREEVIEW WPF EXAMPLE CODE#
#TREEVIEW WPF EXAMPLE WINDOWS#

In most cases, your tree view displays data from a data source, so you typically declare the root TreeView control in XAML, but add the TreeViewNode objects in code or using data binding. You typically add the nodes in code, but we show the XAML hierarchy here because it can be helpful for visualizing how the hierarchy of nodes is created. Here's an example of a simple tree view declared in XAML. When you use ItemsSource, nodes are created for you, and you can access them from the TreeView.RootNodes property. You cannot set both ItemsSource and RootNodes at the same time. ItemsSource is an alternative mechanism to TreeView.RootNodes for putting content into the TreeView control.

#TREEVIEW WPF EXAMPLE WINDOWS#

ItemsSource and its related APIs require Windows 10, version 1809 ( SDK 17763) or later, or the Windows UI Library. Similarly, use ItemTemplate (and the optional ItemTemplateSelector) to provide a DataTemplate that renders the item. You can bind a hierarchical data source to the ItemsSource property to provide the tree view content, just as you would with ListView's ItemsSource. You can nest tree view nodes to whatever depth you require. Each TreeViewNode can then have more nodes added to its Children collection. You create the node hierarchy by adding one or more root nodes to the TreeView control's RootNodes collection.

To create a tree view, you use a TreeView control and a hierarchy of TreeViewNode objects. You can create a tree view by binding the ItemsSource to a hierarchical data source, or you can create and manage TreeViewNode objects yourself. xmlns:muxc='using:Microsoft.UI.Xaml.Controls' See Get Started with WinUI 2 for more info. To use the code in this article with WinUI 2, use an alias in XAML (we use muxc) to represent the Windows UI Library APIs that are included in your project. We recommend using the latest WinUI 2 to get the most current styles, templates, and features for all controls. Get the app from the Microsoft Store or get the source code on GitHub. The WinUI 2 Gallery app includes interactive examples of most WinUI 2 controls, features, and functionality.

Open the WinUI 2 Gallery app and see the TreeView in action.

WinUI 2 Apis: TreeView class, TreeViewNode class, TreeView.ItemsSource property.

UWP APIs: TreeView class, TreeViewNode class, TreeView.ItemsSource property.

For most drill-in scenarios, a regular list view is appropriate. Use a TreeView when items have nested list items, and if it is important to illustrate the hierarchical relationship of items to their peers and nodes.Īvoid using TreeView if highlighting the nested relationship of an item is not a priority.

Arbitrary types of content in a TreeViewItem.TreeViewItem as the root of the TreeView item template.Data binding to the ItemsSource property on TreeView and TreeViewItem.The TreeView APIs support the following features: For example, if you show a file system hierarchy, you could use folder icons for the parent notes and file icons for the leaf nodes. You can include an icon in the tree view item data template to represent nodes. Collapsed nodes use a chevron pointing to the right, and expanded nodes use a chevron pointing down. The tree view uses a combination of indentation and icons to represent the nested relationship between parent nodes and child nodes. It can be used to illustrate a folder structure or nested relationships in your UI. The tree view control enables a hierarchical list with expanding and collapsing nodes that contain nested items.

Treeview wpf example