WPF and RibbonControlsLibrary throws a BindingExpression path error without even using Bindings?

Question

I have a question regarding WPF and RibbonControlsLibrary. I tried to find the source of this error myself but I just do not seem to be able to find it.

I am using the WPF RibbonControlsLibrary from Microsoft. When using the RibbonToggleButton I get the following error even without any bindings in my XAML code.

<r:RibbonWindow x:Class="WpfApplication.MainWindow"
    xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
    xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
    Title="MainWindow" Height="300" Width="300"
    xmlns:r="clr-namespace:Microsoft.Windows.Controls.Ribbon;assembly=RibbonControlsLibrary">
    <r:Ribbon>
        <r:RibbonTab Header="Admin" >
            <r:RibbonMenuButton/>
        </r:RibbonTab>
    </r:Ribbon>
</r:RibbonWindow>

System.Windows.Data Error: 39 : BindingExpression path error: 'IsChecked' property not found on 'object' ''RibbonMenuButton' (Name='')'. BindingExpression:Path=IsChecked; DataItem='RibbonMenuButton' (Name=''); target element is 'RibbonToggleButton' (Name='PART_ToggleButton'); target property is 'NoTarget' (type 'Object')

I am a bit confused by the last part of the error: target element is RibbonToggleButton (Name='PART_ToggleButton'); target property is 'NoTarget' (type 'Object'). There is no RibbonToggleButton in my XAML code at all?

Did someone else see such a behavior and is able to point me into the right direction to get rid of this error output?

Etan

Answer 1

I see that error in the VS output for any ribbontogglebutton. I have attempted to resolve it, but with no luck. Unfortunately, the only fix I have come up with is that it's one of those errors you can ignore.

Bailey

It should only appear in the VS Console unless you set up a logger for it. – Bailey

Is this still not fixed after 8 years? – Unusual

I have no idea, but it appears to still be a popular question. – Bailey

I just reported it here: developercommunity.visualstudio.com/content/problem/665487/… – Lactalbumin

Which was moved to github.com/dotnet/wpf/issues/1473 – Lactalbumin

Answer 2

Looking at the RibbonMenuButton class documentation on MSDN I see that it uses PART_ToggleButton as a TemplatePart attribute. This article describes how TemplateParts work. Since it's baked into the control it's probably expected behavior.

Update:

Looks like the WPF team has been notified of the problem in the comments here. Perhaps it will be fixed in the next release.

Uplift

That article titled "WPF Ribbon October 2010 Update Details" has no comments anymore... – Lactalbumin