Updated: February 2009
Implements a selectable item in a TreeView control.
(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)
<TemplatePartAttribute(Name := "PART_Header", Type := GetType(FrameworkElement))> _
<StyleTypedPropertyAttribute(Property := "ItemContainerStyle", StyleTargetType := GetType(TreeViewItem))> _
Public Class TreeViewItem _
Inherits HeaderedItemsControl
Dim instance As TreeViewItem
[TemplatePartAttribute(Name = "PART_Header", Type = typeof(FrameworkElement))]
[StyleTypedPropertyAttribute(Property = "ItemContainerStyle", StyleTargetType = typeof(TreeViewItem))]
public class TreeViewItem : HeaderedItemsControl
[TemplatePartAttribute(Name = L"PART_Header", Type = typeof(FrameworkElement))]
[StyleTypedPropertyAttribute(Property = L"ItemContainerStyle", StyleTargetType = typeof(TreeViewItem))]
public ref class TreeViewItem : public HeaderedItemsControl
public class TreeViewItem extends HeaderedItemsControl
XAML Object Element Usage
<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.
.jpg)
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
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..::.HeaderedItemsControl
System.Windows.Controls..::.TreeViewItem
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 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.
.NET Framework
Supported in: 3.5, 3.0
Reference
Other Resources