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Ticket T444164
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ToolTip cannot have a logical or visual parent

created 8 years ago

Hi,

We are experiencing what appears to be a random issue that is becoming more prevalent. In our app we have a WPF GridControl together with a DXContentMenu within it. If an item with the content menu is disabled we want to provide an explanation, as such each BarButtonItem within the menu has it's Tooltip bound to a string property which is updated within the underlying ViewModel; below is a sample of a BarButtonItem.

XAML
<dxb:BarButtonItem Content="{Binding Commands.AckCommand.CommandDescription}"  
                   CommandParameter="{Binding SelectedOrders}"  
                   ToolTip="{Binding Commands.AckCommand.DisabledReason}"  
                   Command="{Binding Commands.AckCommand, Mode=OneTime}" />

Occasionally an exception is being raised with the message System.InvalidOperationException: 'ToolTip' cannot have a logical or visual parent.

From the attached stack trace line #62, you can see that the we are updating the DisabledReason property on the ViewModel. Continuing up the call stack you can see

- line #41 it enters DevExpress code
- line #40 calls DevExpress.Xpf.Bars.BarItem.OnToolTipChanged()
- line #31 call BarItemLinkControl.UpdateToolTip()

I have seen two other issues in the forum as below but these are from some time ago
https://www.devexpress.com/Support/Center/Question/Details/T235569
https://www.devexpress.com/Support/Center/Question/Details/B142608

Any assistance resolving this exception would be appreciated.

Thanks
Fahad

Comments (1)
DevExpress Support Team 8 years ago

    Hello Fahad,

    It is difficult to provide a precise solution based only on the posted call stack. It would be helpful if you provide us with step-by-step instructions how to replicate the issue. Alternatively, you can modify the attached sample project which I created while trying to replicate the exception on my side. I'm looking forward to your reply.

    Thanks,
    Michael

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