.NET Maui SwipeItem command binding to viewmodel ancestor fails

Question

I have the following XAML

<CollectionView.ItemTemplate>
    <DataTemplate x:DataType="model:LogEntry">
        <SwipeView>
            <SwipeView.RightItems>
                <SwipeItem Text="Delete"
                           BackgroundColor="Orange"
                           Command="{Binding Source={RelativeSource AncestorType={x:Type viewModel:MainPageViewModel}}, Path=RemoveLogEntryCommand}"
                           CommandParameter="{Binding .}" />
                <SwipeItem Text="Delete" 
                           BackgroundColor="Red"
                           IsDestructive="True" />
            </SwipeView.RightItems>
            <Grid Padding="10">
                <Frame HeightRequest="125"
                           Padding="0"
                           Style="{StaticResource CardView}">
                    <Frame.GestureRecognizers>
                        <TapGestureRecognizer CommandParameter="{Binding .}"
                                              Command="{Binding Source={RelativeSource AncestorType={x:Type viewModel:MainPageViewModel}}, Path=GotoLogEntryDetailsCommand}" />
                    </Frame.GestureRecognizers>
                    <Grid Padding="0"
                              ColumnDefinitions="80,*">

with the following ICommand declarations using the community toolkit

[RelayCommand]
private async Task GotoLogEntryDetails(LogEntry logEntry)
{
    if (logEntry == null)
        return;

    await _appNavigationService.GoTo($"{nameof(LogEntryDetailsPage)}", true,
        new Dictionary<string, object>
        {
            { "LogEntry", logEntry }
        });


}

[RelayCommand]
private async Task RemoveLogEntry(LogEntry logEntry)
{

}

If I put a breakpoint in RemoveLogEntry then click my delete button the breakpoint is never reached. If I put RemoveLogEntry on the tap gesture and tap am item then the breakpoint is reached, so I know that the code generator has created a valid ICommand.

Intellisense tells me that the argument on CommandParameter . is actually a LogEntry therefore I need to declare the viewModel type.

What is wrong with the SwipeItem's ancestor binding path?

Answer 1

I can confirm that the Command Attribute in SwipeItem does not work without a SwipeItems Object as Parent.

This Binding hase worked for me:

<SwipeItems>
<SwipeItem 
    IconImageSource="delete.png" 
    Command="{Binding Source={RelativeSource AncestorType={x:Type viewmodel:TagListDetailViewModel}},Path=DeleteTagCommand}" 
    CommandParameter="{Binding .}"/>
</SwipeItems>