Disable WPF TreeView (or TreeViewItem) selection?

Question

Is there a good way (other than re-dialing everything TreeViewItem.Template) to turn off selection in TreeView?

Basically I am looking for a style ItemsControlfor TreeView(An ItemsControlis the best use for choosing "disable" on ListBox, read this post)

Answer 1

Whenever an item is selected, you can “undo it”. Ex. change the code http://www.codeproject.com/KB/WPF/TreeView_SelectionWPF.aspx or use the MVVM approach (see http://www.codeproject.com/KB/WPF/TreeViewWithViewModel.aspx ) and always set IsSelected false.

Answer 2

Try the following:

<Trigger Property="HasItems" Value="true">
   <Setter Property="Focusable" Value="false" />
</Trigger>

Answer 3

, :

<ListView.ItemContainerStyle>
    <Style TargetType="{x:Type ListViewItem}">
        <Setter Property="IsSelected" Value="{Binding IsSelected, Mode=TwoWay}" />
    </Style>
</ListView.ItemContainerStyle>

TreeViewItem. :

protected bool _DisableSelection;
private bool _IsSelected;
public bool IsSelected
{
    get { return _IsSelected; }
    set
    {
        if (value == _IsSelected) return;
        _IsSelected = _DisableSelection ? false : value;
        NotifyPropertyChanged();
    }
}

!

Answer 4

, HTH:

Namespace Components
  Public NotInheritable Class TreeViewBehavior

    Public Shared Function GetIsTransparent(
      ByVal element As TreeViewItem) As Boolean
      If element Is Nothing Then Throw New ArgumentNullException("element")
      Return element.GetValue(IsTransparentProperty)
    End Function
    Public Shared Sub SetIsTransparent(ByVal element As TreeViewItem,
                                       ByVal value As Boolean)
      If element Is Nothing Then Throw New ArgumentNullException("element")
      element.SetValue(IsTransparentProperty, value)
    End Sub
    Public Shared ReadOnly IsTransparentProperty As DependencyProperty =
      DependencyProperty.RegisterAttached("IsTransparent", GetType(Boolean),
        GetType(TreeViewBehavior),
        New FrameworkPropertyMetadata(False,
          AddressOf IsTransparent_PropertyChanged))
    Private Shared Sub IsTransparent_PropertyChanged(
      ByVal sender As Object, ByVal e As DependencyPropertyChangedEventArgs)
      Dim tvi = DirectCast(sender, TreeViewItem)
      Dim isTransparent = CBool(e.NewValue)

      If isTransparent Then
        AddHandler tvi.Selected, AddressOf tvi_Selected
      Else
        RemoveHandler tvi.Selected, AddressOf tvi_Selected
      End If
    End Sub
    Private Shared Sub tvi_Selected(ByVal sender As Object,
                                    ByVal e As RoutedEventArgs)
      Dim treeViewItem = DirectCast(sender, TreeViewItem)
      If Not treeViewItem.IsSelected Then Exit Sub

      treeViewItem.Dispatcher.Invoke(
        Sub(tvi As TreeViewItem) tvi.IsSelected = False,
        System.Windows.Threading.DispatcherPriority.Send,
        treeViewItem)
    End Sub

  End Class
End Namespace

:

<Window xmlns:components="clr-namespace:WpfApplication.Components">
  <TreeView>
    <TreeView.ItemContainerStyle>
      <Style TargetType="TreeViewItem">
        <Setter 
          Property="components:TreeViewBehavior.IsTransparent" 
          Value="True" />
      </Style>
    </TreeView.ItemContainerStyle>
  </TreeView>
</Window> 

Answer 5

TreeViewItems . TreeView . , , , .

Xaml:

<TreeView SelectedItemChanged="TreeView_SelectionChanged">

:

private void TreeView_SelectionChanged(object sender, RoutedEventArgs e)
{
    var myTreeView = sender as TreeView;
    if (myTreeView == null) return;
    var selectedItem = (TreeViewItem)myTreeView.SelectedItem;
    if (selectedItem ==null) return;
    selectedItem.IsSelected = false;
}

Answer 6

( , - ):

<TreeView>
  <TreeView.ItemContainerStyle>
    <Style TargetType="TreeViewItem">
      <Setter Property="Focusable" Value="False" />
    </Style>
  </TreeView.ItemContainerStyle>
</TreeView>

Answer 7

, :

, ViewModel (, "ShouldPreventSelection" ) , ShouldPreventSelection , , :

TreeView PreviewSelected, :

<TreeView Name="TreeView1"
     ...
     PreviewSelected="TreeView1_PreviewSelected"
     ..
/>

codebehind :

private void TreeView1_PreviewSelected(object sender, RoutedEventArgs e)
{
    MyViewModel myViewModel = TreeView1.DataContext as MyViewModel;
    if (myViewModel == null)
    {
        return;
    }
    if (myViewModel .ShouldPreventSelection)
    {
        e.Handled = true;
    }

}