TreeViewItem.Expanded Kejadian

Definisi

Ruang nama:
System.Windows.Controls
Rakitan:
PresentationFramework.dll

Terjadi ketika IsExpanded properti berubah dari false ke true.

public:
 event System::Windows::RoutedEventHandler ^ Expanded;
public event System.Windows.RoutedEventHandler Expanded;
member this.Expanded : System.Windows.RoutedEventHandler 
Public Custom Event Expanded As RoutedEventHandler

Jenis Acara

RoutedEventHandler

Contoh

Contoh berikut menunjukkan cara menetapkan penanganan aktivitas untuk Expanded peristiwa ke TreeViewItem dan cara menentukan penanganan aktivitas di code-behind.

<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 OnExpanded(object sender, RoutedEventArgs e)
{
    //Perform actions when the TreeViewItem is expanded
}

Private Sub OnExpanded(ByVal sender As Object, ByVal e As RoutedEventArgs)
    'Perform actions when the TreeViewItem is expanded
End Sub

Keterangan

Peristiwa ini terjadi ketika diperluas TreeViewItem sehingga elemen turunannya terlihat.

Informasi Peristiwa Yang Dirutekan

Barang Nilai
Bidang pengidentifikasi ExpandedEvent
Strategi perutean Menggelegak
Delegasikan RoutedEventHandler

Berlaku untuk

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