Prevent selected item on child nodes

[Mattia]

Hi,

How can I prevent selected items on treelistview child nodes?

 

Thank you

[Stefan]

Hi Stefania,

The check for such restriction should be performed on data-level. You can subscribe to the SelectionChanging event of RadTreeListView. SelectionChangingEventArgs exposes a property, from which you can benefit: AddedItems. You can check if the child collection contains the currently selected item with logic similar to the one proposed below:

private void treeFileSystem_SelectionChanging(object sender,
    SelectionChangingEventArgs e)
{
    var selected = e.AddedItems[0] as Club;

    if (selected != null)
    {
        var clubs = (this.treeFileSystem.ItemsSource as ObservableCollection<Club>)
            .Where(c => c.NestedClubs.Contains(selected));

        if (clubs.Count() > 0)
        {
            e.Cancel = true;
        }
    }
}

Can you please give the approach a try and let me know should you need further assistance?

Best Regards,
Stefan
Telerik

[Mattia]

Thank you!

That's exactly what I'm looking for.