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TreeViewItem.Collapsed Event
Definition
- Namespace:
- System.Windows.Controls
- Assembly:
- PresentationFramework.dll
Important
Some information relates to prerelease product that may be substantially modified before it’s released. Microsoft makes no warranties, express or implied, with respect to the information provided here.
Occurs when the IsExpanded property changes from true to false.
public:
event System::Windows::RoutedEventHandler ^ Collapsed;public event System.Windows.RoutedEventHandler Collapsed;member this.Collapsed : System.Windows.RoutedEventHandler Public Custom Event Collapsed As RoutedEventHandler Event Type
Examples
The following example shows how to assign an event handler for the Collapsed event to a TreeViewItem,and how to define the event handler.
<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>
private void OnCollapsed(object sender, RoutedEventArgs e)
{
//Perform actions when the TreeViewItem is collapsed
}
Private Sub OnCollapsed(ByVal sender As Object, ByVal e As RoutedEventArgs)
'Perform actions when the TreeViewItem is collapsed
End Sub
Remarks
This event occurs when a TreeViewItem is collapsed so that child elements are hidden.
Routed Event Information
| Item | Value |
|---|---|
| Identifier field | CollapsedEvent |
| Routing strategy | Bubbling |
| Delegate | RoutedEventHandler |
Applies to
See also
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