[Question] [DataGrid] Binding RowStyle Foreground/Background

[brinko99]

I'm new to UWP, coming from WPF.

I'm struggling to bind the DataGrid's RowStyle Foreground (and Background) properties. The scenario is a log message viewer where the row color indicates the log message severity.

<controls:DataGrid.RowStyle>
    <Style TargetType="controls:DataGridRow">
        <Setter Property="Foreground">
            <Setter.Value>
                <Binding Path="Level"
                         Converter="{StaticResource LogLevelForegroundColorConverter}"/>
            </Setter.Value>
        </Setter>
    </Style>
</controls:DataGrid.RowStyle>

The above produces a NullReferenceException in DataGridRow.EnsureForeground(). Examining the code, it's hard to see where the null reference might be coming from.

This similar issue on SO has an answer that suggests that this is not possible with UWP / DataGrid, though the explanation is wanting. That's hard to believe, but perhaps I'm missing some fundamental limitation here.

Any help is appreciated.

Toolkit: 7.0.2
Windows: 1909

[ghost]

Hello brinko99, thank you for your interest in Windows Community Toolkit!

I have automatically added a "needs triage" label to help get things started. Our team will analyze and investigate the issue, and escalate it to the relevant team if possible.. Other community members may also answer the question and provide feedback 🙌

[michael-hawker]

Binding in styles is not supported by UWP. Direct link to Migration Notes in docs and open WinUI issue on this topic.

[brinko99]

Wow... fundamental limitation indeed. And this looks to be the same for WinUI 3 :-(

Thanks for the quick answer.

[michael-hawker]

@brinko99 yeah, hopefully when they get to the backlog of items for WinUI 3, after 1.0+, it'll be on the list. WPF compat is certainly on their radar. I've tagged that issue with the appropriate label for that as it was missing.