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How to select all the leaf nodes of the parent node in WinForms TreeViewAdv?

Platform: WinForms |
Control: TreeViewAdv

AfterSelect event

We can select all the leaf nodes of the parent node by just selecting the parent node by handling the AfterSelect Event handler.


private void treeViewAdv1_AfterSelect(object sender, System.EventArgs e)
   TreeNodeAdvCollection tn = new TreeNodeAdvCollection();
   foreach (TreeNodeAdv n in this.treeViewAdv1.SelectedNodes)
      this.AddChildren(tn, n);
   foreach (TreeNodeAdv n in tn)
private void AddChildren(TreeNodeAdvCollection tn, TreeNodeAdv n)
   foreach (TreeNodeAdv child in n.Nodes)
      this.AddChildren(tn, child);


Private Sub treeViewAdv1_AfterSelect(ByVal sender As Object, ByVal e As System.EventArgs)
    Dim tn As TreeNodeAdvCollection = New TreeNodeAdvCollection()
    For Each n As TreeNodeAdv In Me.treeViewAdv1.SelectedNodes
       Me.AddChildren(tn, n)
    Next n
    For Each n As TreeNodeAdv In tn
    Next n
End Sub
Private Sub AddChildren(ByVal tn As TreeNodeAdvCollection, ByVal n As TreeNodeAdv)
    For Each child As TreeNodeAdv In n.Nodes
        Me.AddChildren(tn, child)
    Next child
End Sub

Reference link: https://help.syncfusion.com/windowsforms/treeview/treenodeadvcustomization#afterselect-event

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