TreeView Class

Definition

Namespace:

Microsoft.UI.Xaml.Controls

Represents a hierarchical list with expanding and collapsing nodes that contain nested items.

This documentation applies to WinUI 2 for UWP (for WinUI in the Windows App SDK, see the Windows App SDK namespaces).

/// [Windows.Foundation.Metadata.MarshalingBehavior(Windows.Foundation.Metadata.MarshalingType.Agile)]
/// [Windows.Foundation.Metadata.Threading(Windows.Foundation.Metadata.ThreadingModel.Both)]
/// [Microsoft.UI.Xaml.CustomAttributes.MUXPropertyChangedCallbackMethodName(value="OnPropertyChanged")]
/// [Windows.Foundation.Metadata.ContractVersion(Microsoft.UI.Xaml.XamlContract, 65536)]
class TreeView : Control

[Windows.Foundation.Metadata.MarshalingBehavior(Windows.Foundation.Metadata.MarshalingType.Agile)]
[Windows.Foundation.Metadata.Threading(Windows.Foundation.Metadata.ThreadingModel.Both)]
[Microsoft.UI.Xaml.CustomAttributes.MUXPropertyChangedCallbackMethodName(value="OnPropertyChanged")]
[Windows.Foundation.Metadata.ContractVersion(typeof(Microsoft.UI.Xaml.XamlContract), 65536)]
public class TreeView : Control

Public Class TreeView
Inherits Control

Inheritance

Control

TreeView

Attributes

MarshalingBehaviorAttribute ThreadingAttribute Microsoft.UI.Xaml.CustomAttributes.MUXPropertyChangedCallbackMethodNameAttribute ContractVersionAttribute

Examples

Tip

For more info, design guidance, and code examples, see Tree view.

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

The WinUI 2 Gallery app includes interactive examples of most WinUI 2 controls, features, and functionality. Get the app from the Microsoft Store or get the source code on GitHub.

Remarks

Control style and template

You can modify the default Style and ControlTemplate to give the control a unique appearance. For information about modifying a control's style and template, see XAML styles. The default style, template, and resources that define the look of the control are included in the generic.xaml file. For design purposes, generic.xaml is installed with the WinUI (Microsoft.UI.Xaml) NuGet package. By default, this location is \Users\<username>\.nuget\packages\microsoft.ui.xaml\<version>\lib\uap10.0\Microsoft.UI.Xaml\Themes\generic.xaml. Styles and resources from different versions of WinUI might have different values.

XAML also includes resources that you can use to modify the colors of a control in different visual states without modifying the control template (modifying these resources is preferred to setting properties). For more info, see the Light-weight styling section of the XAML styles article.

Constructors

TreeView()

Initializes a new instance of the TreeView control. This documentation applies to WinUI 2 for UWP (for WinUI in the Windows App SDK, see the Windows App SDK namespaces).

Properties

CanDragItems	Gets or sets a value that indicates whether items in the view can be dragged as data payload. This documentation applies to WinUI 2 for UWP (for WinUI in the Windows App SDK, see the Windows App SDK namespaces).
CanDragItemsProperty	Identifies the CanDragItems dependency property. This documentation applies to WinUI 2 for UWP (for WinUI in the Windows App SDK, see the Windows App SDK namespaces).
CanReorderItems	Gets or sets a value that indicates whether items in the view can be reordered through user interaction. This documentation applies to WinUI 2 for UWP (for WinUI in the Windows App SDK, see the Windows App SDK namespaces).
CanReorderItemsProperty	Identifies the CanReorderItems dependency property. This documentation applies to WinUI 2 for UWP (for WinUI in the Windows App SDK, see the Windows App SDK namespaces).
ItemContainerStyle	Gets or sets the style that is used when rendering the item containers. This documentation applies to WinUI 2 for UWP (for WinUI in the Windows App SDK, see the Windows App SDK namespaces).
ItemContainerStyleProperty	Identifies the ItemContainerStyle dependency property. This documentation applies to WinUI 2 for UWP (for WinUI in the Windows App SDK, see the Windows App SDK namespaces).
ItemContainerStyleSelector	Gets or sets a reference to a custom StyleSelector logic class. The StyleSelector returns different Style values to use for the item container based on characteristics of the object being displayed. This documentation applies to WinUI 2 for UWP (for WinUI in the Windows App SDK, see the Windows App SDK namespaces).
ItemContainerStyleSelectorProperty	Identifies the ItemContainerStyleSelector dependency property. This documentation applies to WinUI 2 for UWP (for WinUI in the Windows App SDK, see the Windows App SDK namespaces).
ItemContainerTransitions	Gets or sets the collection of Transition style elements that apply to the item containers of a TreeView. This documentation applies to WinUI 2 for UWP (for WinUI in the Windows App SDK, see the Windows App SDK namespaces).
ItemContainerTransitionsProperty	Identifies the ItemContainerTransitions dependency property. This documentation applies to WinUI 2 for UWP (for WinUI in the Windows App SDK, see the Windows App SDK namespaces).
ItemsSource	Gets or sets an object source used to generate the content of the TreeView. This documentation applies to WinUI 2 for UWP (for WinUI in the Windows App SDK, see the Windows App SDK namespaces).
ItemsSourceProperty	Identifies the ItemsSource dependency property. This documentation applies to WinUI 2 for UWP (for WinUI in the Windows App SDK, see the Windows App SDK namespaces).
ItemTemplate	Gets or sets the DataTemplate used to display each item. This documentation applies to WinUI 2 for UWP (for WinUI in the Windows App SDK, see the Windows App SDK namespaces).
ItemTemplateProperty	Identifies the ItemTemplate dependency property. This documentation applies to WinUI 2 for UWP (for WinUI in the Windows App SDK, see the Windows App SDK namespaces).
ItemTemplateSelector	Gets or sets a reference to a custom DataTemplateSelector logic class. The DataTemplateSelector referenced by this property returns a template to apply to items. This documentation applies to WinUI 2 for UWP (for WinUI in the Windows App SDK, see the Windows App SDK namespaces).
ItemTemplateSelectorProperty	Identifies the ItemTemplateSelector dependency property. This documentation applies to WinUI 2 for UWP (for WinUI in the Windows App SDK, see the Windows App SDK namespaces).
RootNodes	Gets or sets the collection of root nodes of the tree. This documentation applies to WinUI 2 for UWP (for WinUI in the Windows App SDK, see the Windows App SDK namespaces).
SelectedItem	Gets or sets the SelectedItem property of a TreeView. This documentation applies to WinUI 2 for UWP (for WinUI in the Windows App SDK, see the Windows App SDK namespaces).
SelectedItemProperty	Identifies the SelectedItem dependency property. This documentation applies to WinUI 2 for UWP (for WinUI in the Windows App SDK, see the Windows App SDK namespaces).
SelectedItems	Gets the currently selected items. This documentation applies to WinUI 2 for UWP (for WinUI in the Windows App SDK, see the Windows App SDK namespaces).
SelectedNode	Gets or sets the node that is selected in the tree. This documentation applies to WinUI 2 for UWP (for WinUI in the Windows App SDK, see the Windows App SDK namespaces).
SelectedNodes	Gets or sets the collection of nodes that are selected in the tree. This documentation applies to WinUI 2 for UWP (for WinUI in the Windows App SDK, see the Windows App SDK namespaces).
SelectionMode	Gets or sets the selection behavior for a TreeView instance. This documentation applies to WinUI 2 for UWP (for WinUI in the Windows App SDK, see the Windows App SDK namespaces).
SelectionModeProperty	Identifies the SelectionMode dependency property. This documentation applies to WinUI 2 for UWP (for WinUI in the Windows App SDK, see the Windows App SDK namespaces).

Methods

Collapse(TreeViewNode)	Collapses the specified node in the tree. This documentation applies to WinUI 2 for UWP (for WinUI in the Windows App SDK, see the Windows App SDK namespaces).
ContainerFromItem(Object)	Returns the container corresponding to the specified item. This documentation applies to WinUI 2 for UWP (for WinUI in the Windows App SDK, see the Windows App SDK namespaces).
ContainerFromNode(TreeViewNode)	Returns the container corresponding to the specified node. This documentation applies to WinUI 2 for UWP (for WinUI in the Windows App SDK, see the Windows App SDK namespaces).
Expand(TreeViewNode)	Expands the specified node in the tree. This documentation applies to WinUI 2 for UWP (for WinUI in the Windows App SDK, see the Windows App SDK namespaces).
ItemFromContainer(DependencyObject)	Returns the item that corresponds to the specified, generated container. This documentation applies to WinUI 2 for UWP (for WinUI in the Windows App SDK, see the Windows App SDK namespaces).
NodeFromContainer(DependencyObject)	Returns the TreeViewNode corresponding to the specified container. This documentation applies to WinUI 2 for UWP (for WinUI in the Windows App SDK, see the Windows App SDK namespaces).
SelectAll()	Selects all nodes in the tree. This documentation applies to WinUI 2 for UWP (for WinUI in the Windows App SDK, see the Windows App SDK namespaces).

Events

Collapsed	Occurs when a node in the tree is collapsed. This documentation applies to WinUI 2 for UWP (for WinUI in the Windows App SDK, see the Windows App SDK namespaces).
DragItemsCompleted	Occurs when a drag operation that involves one of the items in the view is ended. This documentation applies to WinUI 2 for UWP (for WinUI in the Windows App SDK, see the Windows App SDK namespaces).
DragItemsStarting	Occurs when a drag operation that involves one of the items in the view is initiated. This documentation applies to WinUI 2 for UWP (for WinUI in the Windows App SDK, see the Windows App SDK namespaces).
Expanding	Occurs when a node in the tree starts to expand. This documentation applies to WinUI 2 for UWP (for WinUI in the Windows App SDK, see the Windows App SDK namespaces).
ItemInvoked	Occurs when an item in the tree is invoked. This documentation applies to WinUI 2 for UWP (for WinUI in the Windows App SDK, see the Windows App SDK namespaces).

See also

• TreeViewCollapsedEventArgs
• TreeViewDragItemsCompletedEventArgs
• TreeViewDragItemsStartingEventArgs
• TreeViewExpandingEventArgs
• TreeViewItem
• TreeViewItemInvokedEventArgs
• TreeViewItemTemplateSettings
• TreeViewList
• TreeViewNode
• TreeViewSelectionMode
• TreeView overview