collectview set selected single , but it go in selected mulity when added <ContentPage.Resources> and <SwipeView>

Question

CollectionView SelectionMode="Single"  
but it is selected multiple under blow xml 
no <ContentPage.Resources> it is single , no <SwipeView> it is single too , both them it go wrong ?

<ContentPage xmlns="http://schemas.microsoft.com/dotnet/2021/maui"
             xmlns:x="http://schemas.microsoft.com/winfx/2009/xaml"
             x:Class="myMolly.Views.MyScoresPage"
             Title="收藏" Shell.NavBarIsVisible="False">
    <ContentPage.Resources>
        <Style TargetType="SwipeView">
            <Setter Property="VisualStateManager.VisualStateGroups">
                <VisualStateGroupList>
                    <VisualStateGroup x:Name="CommonStates">
                        <VisualState x:Name="Normal" />
                        <VisualState x:Name="Selected">
                            <VisualState.Setters>
                                <Setter Property="BackgroundColor"
                                        Value="LightSkyBlue" />
                               
                            </VisualState.Setters>
                        </VisualState>
                    </VisualStateGroup>
                </VisualStateGroupList>
            </Setter>
        </Style>
    </ContentPage.Resources>
    <VerticalStackLayout Margin="5">
        <CollectionView x:Name="cvScores"  ItemsSource="{Binding Scores}"  SelectionMode="Single">
            <CollectionView.ItemTemplate>
                <DataTemplate>
                    <SwipeView>
                        <SwipeView.RightItems>
                            <SwipeItems >
                                <SwipeItem Text="删除"
                                           IconImageSource="appicon.png"
                                           BackgroundColor="LightPink"
                                           Command="{Binding Source={x:Reference cvScores}, Path=BindingContext.DeleteCommand}"
                                           CommandParameter="{Binding}" />
                            </SwipeItems>
                        </SwipeView.RightItems>
                        <Grid Padding="5">
                        <Grid.RowDefinitions>
                            <RowDefinition Height="Auto" />
                            <RowDefinition Height="Auto" />
                        </Grid.RowDefinitions>
                        <Grid.ColumnDefinitions>
                            <ColumnDefinition Width="Auto" />
                            <ColumnDefinition Width="Auto" />
                        </Grid.ColumnDefinitions>
                            <Border Grid.RowSpan="2"  StrokeShape="RoundRectangle 10,10,10,10" >
                               <Image 
                               Source="{Binding ImageUrl}" 
                               Aspect="AspectFill"
                               HeightRequest="60" 
                               WidthRequest="60" />
                            </Border>
                            <Label Grid.Column="1" 
                               Text="{Binding Title}" 
                               FontAttributes="Bold" />
                        <Label Grid.Row="1"
                               Grid.Column="1" 
                               Text="{Binding Creator}"
                               FontAttributes="None" 
                               VerticalOptions="End" />
                        </Grid>
                    </SwipeView>
                </DataTemplate>
            </CollectionView.ItemTemplate>
        </CollectionView>
    </VerticalStackLayout>
</ContentPage>

Answer 1

Hello Fei Xu,

=================Update====================

System.AccessViolationException when using SwipeView in a CollectionView on Windows System.AccessViolationException when using SwipeView in a CollectionView on Windows This is a known issue. System.AccessViolationException when using SwipeView in a CollectionView on Windows This is a known issue. See MAUI github links: System.AccessViolationException when using SwipeView in a CollectionView on Windows This is a known issue. See MAUI github links: System.AccessViolationException when using SwipeView in a CollectionView on Windows - back again #9540

SwipeView throw exception on windows

And this known issue can not be solved now. Please don't use SwipeView in a CollectionView before this issue is solved.

Then I test with ListView, when you are running in windows platform with following code, this error do not show it and you can scroll it successfully without add heightrequest like Collectionview, but SwipeView do not show in window platform.

<ContentPage.Resources>
        <Style TargetType="StackLayout">
            <Setter Property="VisualStateManager.VisualStateGroups">
                <VisualStateGroupList>
                    <VisualStateGroup x:Name="CommonStates">
                        <VisualState x:Name="Normal" />
                        <VisualState x:Name="Selected">
                            <VisualState.Setters>
                                <Setter Property="BackgroundColor"
                                        Value="LightSkyBlue" />
                           </VisualState.Setters>
                        </VisualState>
                    </VisualStateGroup>
                </VisualStateGroupList>
            </Setter>
        </Style>
    </ContentPage.Resources>
    <StackLayout>
       <Button Text="scool"></Button>

       <ListView x:Name="cvScores" Margin="5" ItemsSource="{Binding Scores}"   HasUnevenRows="True"  >
            <ListView.ItemTemplate>
                <DataTemplate>
                    <ViewCell>
                        <StackLayout>
                            <SwipeView>
                                <SwipeView.RightItems>
                                    <SwipeItems >
                                        <SwipeItem Text="删除"
                                               IconImageSource="appicon.png"
                                               BackgroundColor="LightPink"
                                               Command="{Binding Source={x:Reference cvScores}, Path=BindingContext.DeleteCommand}"
                                               CommandParameter="{Binding}" />
                                    </SwipeItems>
                                </SwipeView.RightItems>
                                <Grid Padding="5">
                                    <Grid.RowDefinitions>
                                        <RowDefinition Height="Auto" />
                                        <RowDefinition Height="Auto" />
                                    </Grid.RowDefinitions>
                                    <Grid.ColumnDefinitions>
                                        <ColumnDefinition Width="Auto" />
                                        <ColumnDefinition Width="Auto" />
                                    </Grid.ColumnDefinitions>
                                    <Border Grid.RowSpan="2"  StrokeShape="RoundRectangle 10,10,10,10" >
                                        <Image
                                   Source="{Binding ImageUrl}"
                                   Aspect="AspectFill"
                                   HeightRequest="60"
                                   WidthRequest="60" />
                                    </Border>
                                    <Label Grid.Column="1"
                                   Text="{Binding Title}"
                                   FontAttributes="Bold" />
                                    <Label Grid.Row="1"
                                   Grid.Column="1"
                                   Text="{Binding Creator}"
                                   FontAttributes="None"
                                   VerticalOptions="End" >
                                    </Label>
                                </Grid>
                            </SwipeView>
                        </StackLayout>
                    </ViewCell>
                </DataTemplate>
            </ListView.ItemTemplate>
        </ListView>
   </StackLayout>
</ContentPage>

Best Regards, Leon Lu

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