使用 BindableLayout.ItemsSource 在 StackLayout 中进行命令绑定（使用 RelativeSourceExtension）

Question

I am trying to bind a command (with RelativeSourceExtension) to a button within a StackLayout using BindableLayout.ItemsSource in an Xamarin.Forms App.

Not working version of MyControl.xaml:

<?xml version="1.0" encoding="UTF-8"?>
<Grid xmlns="http://xamarin.com/schemas/2014/forms" 
      ...
      x:Class="MyApp.Views.MyControl">

    <StackLayout Orientation="Horizontal" 
                 BindableLayout.ItemsSource="{Binding Data}">
        <Button Command="{Binding Source={RelativeSource AncestorType={x:Type views:MyControl}}, Path=BindingContext.RemoveCommand}"
                CommandParameter="{Binding}" 
                Text="Remove"/>
    </StackLayout>

</Grid>

Unfortunately the button is "inactive" and does not let you "click". The same command binding works fine in a ListView with ItemsSource.

Working version of MyControl.xaml:

<?xml version="1.0" encoding="UTF-8"?>
<Grid xmlns="http://xamarin.com/schemas/2014/forms" 
      ...
      x:Class="MyApp.Views.MyControl">

    <ListView ItemsSource="{Binding Data}"
              HasUnevenRows="true">
        <ListView.ItemTemplate>
            <DataTemplate>
                <ViewCell>
                    <Button Command="{Binding Source={RelativeSource AncestorType={x:Type views:MyControl}}, Path=BindingContext.RemoveCommand}"
                            CommandParameter="{Binding}" 
                            Text="Remove"/>
                </ViewCell>
            </DataTemplate>
        </ListView.ItemTemplate>
    </ListView>
</Grid>

Control Usage in MainPage.xmal:

<Grid BindingContext="{Binding Cart}">
    ...
    <views:MyControl/>
    ....
</Grid>

Am I generally doing something wrong? Or is there a trick to make this work?

Answer 1

You missed using StackLayout.ItemTemplate and after DataTemplate in you xaml. Your button is not wrapped in a good way. That's it.