TreeView PreviewUnchecked Event

[Gnanavel]

I want to prevent unchecking of treeview node based on some condition. I tried setting using e.Handled = true of TreeView PreviewUnchecked Event still the treeview node is unchecked.

 void treeView_PreviewUnchecked(object sender, Telerik.Windows.RadRoutedEventArgs e)
        {
            RadTreeViewItem item = e.OriginalSource as RadTreeViewItem;
            Node node = (Node)item.Item;

            //Select TreeNode Value when opened from Manage Screen
            if ((XYViewModel.XYPairList != null) && (XYViewModel.XYPairList.Count > 0))
            {
              
                    MessageBox.Show("You cannot uncheck this node as this is part of XY pair. Please delete the XY Pair and uncheck again.", "Node exists in XY Pair", MessageBoxButton.OK);

                    item.CheckState = System.Windows.Automation.ToggleState.On;
                    e.Handled = true;

            }
        }

[Petar Mladenov]

Hi Gnanavel,

Unfortunately, I can't reproduce your issue. Can you please take a look at the attached example and let me know if I am missing something. Thank you in advance.

Sincerely yours,
Petar Mladenov
the Telerik team