TreeViewControl.ShowingEditor Event

Occurs before a node’s editor is opened. Allows you to prevent the activation of the editor.

Namespace: DevExpress.Xpf.Grid

Assembly: DevExpress.Xpf.Grid.v23.2.dll

NuGet Package: DevExpress.Wpf.Grid.Core

Declaration

C#

public event TreeViewShowingEditorEventHandler ShowingEditor

VB.NET

Public Event ShowingEditor As TreeViewShowingEditorEventHandler

Event Data

The ShowingEditor event's data class is DevExpress.Xpf.Grid.TreeList.TreeViewShowingEditorEventArgs.

Remarks

The following code sample prevents the activation of the root node’s editor.

XAML

<dxg:TreeViewControl x:Name="treeview"
                     ...
                     AllowEditing="True"
                     ShowingEditor="treeview_ShowingEditor"/>

C#

void treeview_ShowingEditor(object sender, DevExpress.Xpf.Grid.TreeList.TreeViewShowingEditorEventArgs e) {
    e.Cancel = e.Node.Level == 0;
}

VB.NET

Private Sub treeview_ShowingEditor(ByVal sender As Object, ByVal e As DevExpress.Xpf.Grid.TreeList.TreeViewShowingEditorEventArgs)
    e.Cancel = e.Node.Level = 0
End Sub

For more information, refer to the following help topic: Edit Data.