Gets or sets whether the nested items in a TreeViewItem are expanded or collapsed. This is a dependency property.
(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)
Public Property IsExpanded As Boolean
Dim instance As TreeViewItem
Dim value As Boolean
value = instance.IsExpanded
instance.IsExpanded = value
public bool IsExpanded { get; set; }
public:
property bool IsExpanded {
bool get ();
void set (bool value);
}
public function get IsExpanded () : boolean
public function set IsExpanded (value : boolean)
<object IsExpanded="bool" .../>
Dependency Property Information
The appearance of the button that expands and collapses the TreeViewItem changes when the TreeViewItem is expanded or collapsed. When the IsExpanded property value changes from true to false, the Collapsed event occurs. Similarly, the Expanded event occurs when the IsExpanded property value changes from false to true.
The following example shows how to set the IsExpanded property.
<TreeViewItem Header="Employee1"
Name="Employee1Data"
IsExpanded="True"
Collapsed="OnCollapsed"
Expanded="OnExpanded">
<TreeViewItem Header="Work Days"
Name="EmployeeWorkDays"
IsSelected="True">
<TreeViewItem Header="Tuesday" />
<TreeViewItem Header="Friday"/>
</TreeViewItem>
</TreeViewItem>
<TreeViewItem Header="Employee2"
Name="Employee2Data">
<TreeViewItem Header="Work Days"
Name="emp2WorkDays"
Selected="GetSchedule"
Unselected="SetSchedule">
<TreeViewItem Header="Monday" />
<TreeViewItem Header="Wednesday"/>
</TreeViewItem>
</TreeViewItem>
Employee1Data.IsExpanded = true;
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