TreeViewItem Class
Updated: February 2009
Implements a selectable item in a TreeView control.
Assembly: PresentationFramework (in PresentationFramework.dll)
XMLNS for XAML: http://schemas.microsoft.com/winfx/2006/xaml/presentation, http://schemas.microsoft.com/netfx/2007/xaml/presentation
'Declaration <TemplatePartAttribute(Name := "PART_Header", Type := GetType(FrameworkElement))> _ <StyleTypedPropertyAttribute(Property := "ItemContainerStyle", StyleTargetType := GetType(TreeViewItem))> _ Public Class TreeViewItem _ Inherits HeaderedItemsControl 'Usage Dim instance As TreeViewItem
<TreeViewItem> Items </TreeViewItem>
Content Model: TreeViewItem is a HeaderedItemsControl. Its content properties are Items and ItemsSource, and its header property is Header. For more information on the content model for TreeViewItem, see Controls Content Model Overview.
TreeViewItem controls can be embedded inside other TreeViewItem controls to create a hierarchy of nodes inside a TreeView control.
The following illustration shows a hierarchy of TreeViewItem controls inside a TreeView.

To expand or collapse a TreeViewItem, use the IsExpanded property.
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 Themes.
The following example shows how to create a hierarchy of TreeViewItem controls in a TreeView control.
<TreeView Name="myTreeViewEvent" > <TreeViewItem Header="Employee1" IsSelected="True"> <TreeViewItem Header="Jesper Aaberg"/> <TreeViewItem Header="Employee Number"> <TreeViewItem Header="12345"/> </TreeViewItem> <TreeViewItem Header="Work Days"> <TreeViewItem Header="Monday"/> <TreeViewItem Header="Tuesday"/> <TreeViewItem Header="Thursday"/> </TreeViewItem> </TreeViewItem> <TreeViewItem Header="Employee2"> <TreeViewItem Header="Dominik Paiha"/> <TreeViewItem Header="Employee Number"> <TreeViewItem Header="98765"/> </TreeViewItem> <TreeViewItem Header="Work Days"> <TreeViewItem Header="Tuesday"/> <TreeViewItem Header="Wednesday"/> <TreeViewItem Header="Friday"/> </TreeViewItem> </TreeViewItem> </TreeView>
More Code
| How to: Create Simple or Complex TreeViews | This example shows how to create simple or complex TreeView controls. |
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.HeaderedItemsControl
System.Windows.Controls.TreeViewItem
Windows 7, Windows Vista, Windows XP SP2, Windows Server 2008 R2, 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.
Date | History | Reason |
|---|---|---|
February 2009 | Described how default styles change dependency properties. | Customer feedback. |
July 2008 | Added new members: MeasureOverride method, PrepareContainerForItemOverride method. | SP1 feature change. |