TreeView PreviewUnchecked Event

2 posts, 0 answers
  1. Gnanavel
    Gnanavel avatar
    1 posts
    Member since:
    Sep 2010

    Posted 30 Sep 2010 Link to this post

    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;


  2. Petar Mladenov
    Petar Mladenov avatar
    3152 posts

    Posted 05 Oct 2010 Link to this post

    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
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