TreeViewItem.OnSelected Method
Microsoft Silverlight will reach end of support after October 2021. Learn more.
Raises the Selected event when the IsSelected property changes from false to true.
Namespace: System.Windows.Controls
Assembly: System.Windows.Controls (in System.Windows.Controls.dll)
Syntax
'Declaration
Protected Overridable Sub OnSelected ( _
e As RoutedEventArgs _
)
protected virtual void OnSelected(
RoutedEventArgs e
)
Parameters
- e
Type: System.Windows.RoutedEventArgs
A RoutedEventArgs that contains the event data.
Remarks
This method updates the visual state of the TreeViewItem when the value of IsSelected changes, and then raises the Selected event.
To perform operations when a TreeViewItem is selected or unselected, you should handle the SelectedItemChanged event on the parent TreeView control.
Raising an event invokes the event handler through a delegate. The OnSelected method also allows derived classes to handle the event without attaching a delegate. This is the preferred technique for handling the event in a derived class.
Notes to Inheritors
When overriding OnSelected in a derived class, make sure to call the base class’s OnSelected method so that registered delegates receive the event.
Version Information
Silverlight
Supported in: 5, 4, 3
Platforms
For a list of the operating systems and browsers that are supported by Silverlight, see Supported Operating Systems and Browsers.