Επεξεργασία

Κοινή χρήση μέσω

TreeView.SelectedItemChanged Event

  • Reference

Definition

Namespace:
System.Windows.Controls
Assembly:
PresentationFramework.dll

Occurs when the SelectedItem changes.

public:
 event System::Windows::RoutedPropertyChangedEventHandler<System::Object ^> ^ SelectedItemChanged;
public event System.Windows.RoutedPropertyChangedEventHandler<object> SelectedItemChanged;
member this.SelectedItemChanged : System.Windows.RoutedPropertyChangedEventHandler<obj> 
Public Custom Event SelectedItemChanged As RoutedPropertyChangedEventHandler(Of Object)

Event Type

RoutedPropertyChangedEventHandler<Object>

Examples

The following example shows how to specify an event handler for the SelectedItemChanged event.

<TreeView SelectedItemChanged="SelectionChanged">
  <TreeViewItem Header="Employee1" IsSelected="True">
    <TreeViewItem Header="Jesper"/>
    <TreeViewItem Header="Aaberg"/>
    <TreeViewItem Header="12345"/>
  </TreeViewItem>
  <TreeViewItem Header="Employee2">
    <TreeViewItem Header="Dominik"/>
    <TreeViewItem Header="Paiha"/>
    <TreeViewItem Header="98765"/>
  </TreeViewItem>
</TreeView>

The following example shows how to define the event handler.

private void SelectionChanged(object sender, RoutedPropertyChangedEventArgs<Object> e)
{
    //Perform actions when SelectedItem changes
    MessageBox.Show(((TreeViewItem) e.NewValue).Header.ToString());
}

Private Sub SelectionChanged(ByVal sender As Object, ByVal e As RoutedPropertyChangedEventArgs(Of Object))
    'Perform actions when SelectedItem changes
    MessageBox.Show((CType(e.NewValue, TreeViewItem)).Header.ToString())
End Sub

Remarks

Routed Event Information
Identifier Field SelectedItemChangedEvent
Routing Strategy Bubbling
Delegate RoutedPropertyChangedEventHandler<T>

XAML Attribute Usage

<object SelectedItemChanged="RoutedPropertyChangedEventHandler"/>

Applies to