ui:InfoBar ：The control closing event cannot be triggered

[mingyaodagege]

Describe the bug

ui:InfoBar ：The control closing event cannot be triggered

To Reproduce

Expected behavior

Closed

Screenshots

OS version

win11

.NET version

.net6

WPF-UI NuGet version

3.0.0-preview.1

Additional context

No response

[johnvesalius]

This bug is still present in 3.0.0-preview.9.

[Virtualizer]

Same with Preview.8. Setting IsClosable to true or binding to ViewModel doesn't change anything, too.

<ui:InfoBar Title="{Binding ViewModel.Message.Value.Title}" Margin="20" HorizontalAlignment="Right" VerticalAlignment="Bottom" IsClosable="{Binding ViewModel.IsMessageOpen}" IsOpen="{Binding ViewModel.IsMessageOpen, Mode=TwoWay}" Message="{Binding ViewModel.Message.Value.Message}" Severity="{Binding ViewModel.Message.Value.Severity}" />

[pokorpa]

The problem is caused by RelayCommand<bool> used to close the InfoBar.
Since the command receives null for argument, the CanExecute logic evaluates to false.