CompiledBinding with Xaml Source

[albilaga]

I am confused on how to use CompiledBinding with Xaml that have list items. Lets say I have this Page

<?xml version="1.0" encoding="utf-8" ?>
<ContentPage
    x:Class="Test.Features.NewMainPage"
    xmlns="http://schemas.microsoft.com/dotnet/2021/maui"
    xmlns:x="http://schemas.microsoft.com/winfx/2009/xaml"
    xmlns:models="clr-namespace:Test.Models"
   xmlns:features="clr-namespace:Test.Features"
    x:DataType="features:MainViewModel">
    <CollectionView x:Name="CollectionView" ItemsSource="{Binding Items}">
        <CollectionView.ItemTemplate>
            <DataTemplate x:DataType="models:Item">
                <SwipeView Padding="8,4">
                    <SwipeView.RightItems>
                        <SwipeItem
                            BackgroundColor="Red"
                           Command="{Binding Source={RelativeSource AncestorType={x:Type features:MainViewModel}}, Path=DeleteItem, x:DataType=features:MainViewModel}"
                            CommandParameter="{Binding}"
                            IconImageSource="delete.png"
                            Text="Delete" />
                    </SwipeView.RightItems>
                    <Grid>
                       <Label Text="{Binding Name}" />
                    </Grid>
                </SwipeView>
            </DataTemplate>
        </CollectionView.ItemTemplate>
    </CollectionView>
</ContentPage>

this is working in debug. But when it release if I am using XAMLCompilation I got this error

Microsoft.Maui.Controls.BindingExpression.SetupPart(TypeInfo, BindingExpression.BindingExpressionPart): Attribute 'System.Runtime.CompilerServices.TupleElementNamesAttribute' is being referenced in code but the trimmer was instructed to remove all instances of this attribute. If the attribute instances are necessary make sure to either remove the trimmer attribute XML portion which removes the attribute instances, or override the removal by using the trimmer XML descriptor to keep the attribu

[Eskissimo]

Hello,

I think you miss to declare "features" viewmodel path as namespace, could you try to add this line:

<ContentPage
    ...
    xmlns:features="clr-namespace:Test.ViewModels.Features"
    ...
    x:DataType="features:MainViewModel">

Where "Test.ViewModels.Features" is the path of your MainViewModel viewmodel.

To help you with binding errors you could add this to your csproj in order to see errors:

<MauiStrictXamlCompilation>true</MauiStrictXamlCompilation>
<MauiEnableXamlCBindingWithSourceCompilation>true</MauiEnableXamlCBindingWithSourceCompilation>

You can reffer to this page for more details: https://learn.microsoft.com/en-us/dotnet/maui/fundamentals/data-binding/compiled-bindings?view=net-maui-9.0

Regards.