[This documentation is for preview only, and is subject to change in later releases. Blank topics are included as placeholders.]
Represents a control that displays hierarchical data in a tree structure that has items that can expand and collapse.
(in PresentationFramework.dll)
XMLNS for XAML: http://schemas.microsoft.com/winfx/2006/xaml/presentation, http://schemas.microsoft.com/netfx/2007/xaml/presentation
Visual Basic (Declaration)
<StyleTypedPropertyAttribute(Property := "ItemContainerStyle", StyleTargetType := GetType(TreeViewItem))> _
Public Class TreeView _
Inherits ItemsControl
[StyleTypedPropertyAttribute(Property = "ItemContainerStyle", StyleTargetType = typeof(TreeViewItem))]
public class TreeView : ItemsControl
[StyleTypedPropertyAttribute(Property = L"ItemContainerStyle", StyleTargetType = typeof(TreeViewItem))]
public ref class TreeView : public ItemsControl
[<StyleTypedPropertyAttribute(Property = "ItemContainerStyle", StyleTargetType = typeof(TreeViewItem))>]
type TreeView =
class
inherit ItemsControl
end
XAML Object Element Usage
<TreeView>
Items
</TreeView>
TreeView is an ItemsControl, which means it can contain a collection of objects of any type (such as string, image, or panel). For more information, see the ItemsControl class.
The following illustration shows a simple TreeView.
.jpg)
The contents of a TreeView are TreeViewItem controls that can contain rich content, such as Button and Image controls. A TreeViewItem can contain one or more TreeViewItem objects as its descendants. A TreeView is defined as a hierarchy of TreeViewItem objects.
A TreeView can populate its tree by binding to a data source and using HierarchicalDataTemplate objects. Examples of data sources include XmlDataProvider and ObservableCollection<(Of <(T>)>) objects.
Displaying a large number of items may cause performance issues. See Optimizing Performance: Controls for more information. To improve the performance of a TreeView, see How to: Improve the Performance of a TreeView.
For more information about the TreeView control, see the TreeView Overview.
Dependency properties for this control might be set by the control’s default style. If a property is set by a default style, the property might change from its default value when the control appears in the application. The default style is determined by which desktop theme is used when the application is running. For more information, see Default WPF Themes.
A TreeView has a limited number of levels. For more information, see Visual.
The following example shows how to create a TreeView.
<TreeView>
<TreeViewItem Header="Employee1">
<TreeViewItem Header="Jesper"/>
<TreeViewItem Header="Aaberg"/>
<TreeViewItem Header="12345"/>
</TreeViewItem>
<TreeViewItem Header="Employee2">
<TreeViewItem Header="Dominik"/>
<TreeViewItem Header="Paiha"/>
<TreeViewItem Header="98765"/>
</TreeViewItem>
</TreeView>
More Code
System..::.Object
System.Windows.Threading..::.DispatcherObject
System.Windows..::.DependencyObject
System.Windows.Media..::.Visual
System.Windows..::.UIElement
System.Windows..::.FrameworkElement
System.Windows.Controls..::.Control
System.Windows.Controls..::.ItemsControl
System.Windows.Controls..::.TreeView
Any public static (Shared in Visual Basic) members of this type are thread safe. Any instance members are not guaranteed to be thread safe.
Windows 7, Windows Vista, Windows XP SP2, Windows Server 2008, Windows Server 2003
The .NET Framework and .NET Compact Framework do not support all versions of every platform. For a list of the supported versions, see .NET Framework System Requirements.
.NET Framework
Supported in: 4, 3.5, 3.0
.NET Framework Client Profile
Supported in: 4
Reference
Other Resources