Receiving 'ToolTip' cannot have a logical or visual parent

Question

Since updating from .NET 4.61 to .NET 4.8 customers quite regularly receive the following exception:

System.InvalidOperationException: "ToolTip" kann keine logischen odervisuellen übergeordneten Elemente besitzen.
   bei System.Windows.Controls.ToolTip.OnAncestorChanged()
   bei System.Windows.FrameworkElement.OnAncestorChangedInternal(TreeChangeInfo parentTreeState)
   bei System.Windows.TreeWalkHelper.OnAncestorChanged(DependencyObject d, TreeChangeInfo info, Boolean visitedViaVisualTree)
   bei System.Windows.DescendentsWalker`1._VisitNode(DependencyObject d, Boolean visitedViaVisualTree)
   bei MS.Internal.PrePostDescendentsWalker`1._VisitNode(DependencyObject d, Boolean visitedViaVisualTree)
   bei System.Windows.DescendentsWalker`1.VisitNode(FrameworkElement fe, Boolean visitedViaVisualTree)
   bei System.Windows.DescendentsWalker`1.VisitNode(DependencyObject d, Boolean visitedViaVisualTree)
   bei System.Windows.DescendentsWalker`1.WalkLogicalChildren(FrameworkElement feParent, FrameworkContentElement fceParent, IEnumerator logicalChildren)
   bei System.Windows.DescendentsWalker`1.WalkFrameworkElementLogicalThenVisualChildren(FrameworkElement feParent, Boolean hasLogicalChildren)
   bei System.Windows.DescendentsWalker`1.IterateChildren(DependencyObject d)
   bei System.Windows.DescendentsWalker`1.StartWalk(DependencyObject startNode, Boolean skipStartNode)
   bei MS.Internal.PrePostDescendentsWalker`1.StartWalk(DependencyObject startNode, Boolean skipStartNode)
   bei System.Windows.TreeWalkHelper.InvalidateOnTreeChange(FrameworkElement fe, FrameworkContentElement fce, DependencyObject parent, Boolean isAddOperation)
   bei System.Windows.Controls.Primitives.Popup.UpdatePlacementTargetRegistration(UIElement oldValue, UIElement newValue)
   bei System.Windows.Controls.Primitives.Popup.CreateWindow(Boolean asyncCall)
   bei System.Windows.Controls.Primitives.Popup.OnIsOpenChanged(DependencyObject d, DependencyPropertyChangedEventArgs e)
   bei System.Windows.DependencyObject.OnPropertyChanged(DependencyPropertyChangedEventArgs e)
   bei System.Windows.FrameworkElement.OnPropertyChanged(DependencyPropertyChangedEventArgs e)
   bei System.Windows.DependencyObject.NotifyPropertyChange(DependencyPropertyChangedEventArgs args)

This may occur due to badly defined tooltips.

My problem is: the stacktrace doesn't give any hint which element is the cause for this error.

How can I find out what is the source element which caused the exception?

You could try to trigger all tool tips in your application to find the one(s) that cause the error. — BionicCode, Oct 09 '22 at 08:55

score 1 · Answer 1 · answered Oct 08 '22 at 11:26

1

Debug -> Windows -> Exception Settings -> Common Language Runtime Exceptions -> Click that you have correct mark.

Now your project stops when exception accours.

answered Oct 08 '22 at 11:26

Tuukka Lehtinen

32
1

Unfortunately this error occurs on a customer's machine. Therefore it's not possible to debug on this machine. – Abid Oct 08 '22 at 13:49
Really hard to say, probably someting simple like custom tooltip style problem. – Tuukka Lehtinen Oct 08 '22 at 14:25

Receiving 'ToolTip' cannot have a logical or visual parent

1 Answers1