zIn .net毛伊岛应用程序我有以下问题：我的集合视图在调试模式下工作正常，但在发布模式下，集合视图只显示一个白色矩形，而不是一个图像和两个标签。onClick函数工作正常：这是xaml：

<ContentPage xmlns="http://schemas.microsoft.com/dotnet/2021/maui"
             xmlns:x="http://schemas.microsoft.com/winfx/2009/xaml"
             xmlns:vm="clr-namespace:VegaMaui"
             xmlns:model="clr-namespace:VegaMaui.Model"
             x:Class="VegaMaui.MenuDetails"   x:DataType="vm:MenuDetailsViewModel"        
             Title="Ապրանքներ"
             BackgroundColor="#f9f9f9">   
    <CollectionView 
            RemainingItemsThreshold="5"
            RemainingItemsThresholdReachedCommand="{Binding LoadMoreS}"
            SelectionMode="Single"
            SelectionChanged="OnProdSelectionChanged"
            ItemsSource="{Binding ProdListS}"
            x:Name="prodcollect">
        <CollectionView.ItemsLayout>
            <GridItemsLayout Orientation="Vertical"
                        Span="2" />
        </CollectionView.ItemsLayout>       
        <CollectionView.ItemTemplate>            
            <DataTemplate x:DataType="model:ProductImg">                    
                <Grid Margin="5,5,5,5" Padding="1" >
                    <Grid.RowDefinitions>
                        <RowDefinition Height="Auto" />
                        <RowDefinition Height="Auto" />
                        <RowDefinition Height="Auto" />
                        <RowDefinition Height="Auto" />
                    </Grid.RowDefinitions>
                    <Grid.ColumnDefinitions>
                        <ColumnDefinition Width="*" />                           
                    </Grid.ColumnDefinitions>
                    <Image
                        Grid.Row="0"                           
                        Grid.Column="0"                         
                        Source= "{Binding firstPicture}"                        
                        Aspect="AspectFill"/>                    
                    <Label Grid.Row="1"
                        Grid.Column="0"                      
                        FontAttributes="Bold"
                        BackgroundColor="White"
                        LineBreakMode="WordWrap"
                        Text="{Binding product_Name}"
                        VerticalOptions="Start" />
                    <Label Grid.Row="2"
                        Grid.Column="0"                      
                        FontAttributes="Bold"
                        LineBreakMode="WordWrap"
                        BackgroundColor="White"
                        Text="{Binding product_DisPrice, StringFormat='{0:F0} դր.'}"
                        TextColor ="Red" FontSize="Default"
                        VerticalOptions="Start" />
                    <Label Grid.Row="3"
                        Grid.Column="0"                                   
                        LineBreakMode="WordWrap"
                        BackgroundColor="White"
                        IsVisible="{Binding IsShowMode}"
                        Text="{Binding product_Price, StringFormat='{0:F0} դր.'}"
                        TextColor="#40414a"  FontSize="Default" 
                        TextDecorations="Strikethrough"
                        VerticalOptions="Start" />

                </Grid>                    
            </DataTemplate>
        </CollectionView.ItemTemplate>
    </CollectionView>   
</ContentPage>

这是ViewModel：

namespace VegaMaui
{
    public  class MenuDetailsViewModel : INotifyPropertyChanged
    {
        public event PropertyChangedEventHandler PropertyChanged;
        private int startindex = 1;
        private int endindex = 10;        
        private string SubGrInd = "";
        private readonly VegaApi ApiControl;
        private void OnPropertyChanged(string propertyName) =>
            PropertyChanged?.Invoke(this, new PropertyChangedEventArgs(propertyName));
        public MenuDetailsViewModel(string SubGroup)
        {
            SubGrInd = SubGroup;    
             ApiControl = new();
            // Task.Run(() => this.LoadData(SubGroup)).Wait();
            ProdListS = new ObservableCollection<Model.Product>();
            new Thread(() =>
            {
                LoadDataS();
            }).Start();
            
        }        
        public async Task LoadDataS()
        {           
            var data =  await ApiControl.GetMenuDetAsync(SubGrInd, startindex,endindex);
            ProdListS = new ObservableCollection<Model.Product>(data);
            PropertyChanged.Invoke(this,new PropertyChangedEventArgs(nameof(ProdListS)));
        }
        public ICommand LoadMoreS => new Command(async () =>
        {           
            startindex += 16;
            endindex += 16;
                ObservableCollection<Model.Product> data = null;
                new Thread(() =>
                {
                     data=  ApiControl.GetMenuDetAsync(SubGrInd, startindex, endindex).Result;          
                    foreach (var item in data)
                    {
                        ProdListS.Add(item);
                        PropertyChanged.Invoke(this, new PropertyChangedEventArgs(nameof(ProdListS)));
                    }               
                }).Start();            
        });       
        public ObservableCollection<Model.Product> ProdListS { get; set; } 
    }
}

}        
    public async Task LoadDataS()
    {           
        var data =  await ApiControl.GetMenuDetAsync(SubGrInd, startindex,endindex);
        ProdListS = new ObservableCollection<Model.Product>(data);
        PropertyChanged.Invoke(this,new PropertyChangedEventArgs(nameof(ProdListS)));
    }
    public ICommand LoadMoreS => new Command(async () =>
    {           
        startindex += 16;
        endindex += 16;
            ObservableCollection<Model.Product> data = null;
            new Thread(() =>
            {
                 data=  ApiControl.GetMenuDetAsync(SubGrInd, startindex, endindex).Result;          
                foreach (var item in data)
                {
                    ProdListS.Add(item);
                    PropertyChanged.Invoke(this, new PropertyChangedEventArgs(nameof(ProdListS)));
                }               
            }).Start();            
    });       
    public ObservableCollection<Model.Product> ProdListS { get; set; } 
}

}
public partial class：public String[] nums;

private MenuDetailsViewModel _mdvm;
public MenuDetails(string subGID)
{        
    BindingContext = _mdvm = new MenuDetailsViewModel(subGID);
    InitializeComponent();    
   
}
async void OnProdSelectionChanged(object sender, SelectionChangedEventArgs e)
{
    
    Model.Product prodItem = this.prodcollect.SelectedItem as Model.Product;
    int id_Param = prodItem.product_Id;
    VegaApi ApiControl = new();
    List<Model.ProdParams> ParamList = await ApiControl.GetParamDetAsync(id_Param.ToString());      
    ProdInformation ProfilePage = new ProdInformation();
    ProfilePage.Title = this.Title;
    ProfilePage.BindingContext = prodItem;        
    VerticalStackLayout PropsStack = ProfilePage.FindByName<VerticalStackLayout>("InfoLayout");
    //Label NmLabel = ProfilePage.FindByName<Label>("prodname");
    //NmLabel.Text = prodItem.product_Name;
    //Label PrLabel = ProfilePage.FindByName<Label>("prodprice");
    //PrLabel.Text = prodItem․+ " դր.";
   
    // Adding Images carousel view      
    string[] picarray = prodItem.product_PicturePath.Split('@');
        System.Collections.ObjectModel.ObservableCollection<Promo> Data = new System.Collections.ObjectModel.ObservableCollection<Promo>();      
    Data.Add(new Promo() { ImgSource =prodItem.firstPicture});
    if (picarray.Count() > 1)
    {          
        for (int k = 1; k < picarray.Count(); k++)
        {
            if (picarray[k] != null && picarray[k].Length > 3)
            {
                Data.Add(new Promo() { ImgSource = "https://vega.am/image/"+ picarray[k] });
            }
        }
    }
   
   CarouselView CurCarousel= ProfilePage.FindByName<CarouselView>("pcarousel");
    CurCarousel.ItemsSource = Data;
    //  StackLayout slayout = new StackLayout();    
   
   
   // PropsStack.Add(primage);
    List<int> TitleIds = (from el in ParamList select el.Title_Id).Distinct().ToList();
    if (TitleIds != null && TitleIds.Count > 0)
    {
        for (int j = 0; j<TitleIds.Count; j++)
        {
            List<Model.ProdParams> subLst= ParamList.Where(p => p.Title_Id == TitleIds[j]).ToList();
            if(subLst != null && subLst.Count > 0)
            {
                Label ltitle= new Label();
                ltitle.Text = subLst[0].Title_Name;
                ltitle.FontSize = 18;
                ltitle.TextColor = Color.FromRgb(16, 26, 175);
                ltitle.Padding = new Thickness(3, 5, 3, 5);
                ltitle.HorizontalOptions = LayoutOptions.Start;
                PropsStack.Add(ltitle);
                Grid CurGrid = new Grid
                {
                    
                    ColumnDefinitions =
                     {
                        new ColumnDefinition{Width = new GridLength(5, GridUnitType.Star)},
                        new ColumnDefinition{Width = new GridLength(3, GridUnitType.Star)}
                     }
                };                    
                for (int q=0;q< subLst.Count;q++)
                {     
                    CurGrid.AddRowDefinition(new RowDefinition());
                   
                    
                    CurGrid.Add(new Label
                    {
                        
                        Text = subLst[q].Param_Name+" ",
                        LineBreakMode = LineBreakMode.WordWrap,
                        MaxLines =2,
                        HorizontalOptions = LayoutOptions.Start,
                        VerticalOptions = LayoutOptions.Center
                    },0,q);
                    CurGrid.Add(new Label
                     {
                        Text = subLst[q].Param_Value,
                        LineBreakMode = LineBreakMode.WordWrap,
                        MaxLines = 2,
                        HorizontalOptions = LayoutOptions.Start,
                        VerticalOptions = LayoutOptions.Center
                    },1,q);
                }
                PropsStack.Add(CurGrid);
            }
        }
    }        
    await Navigation.PushAsync(ProfilePage);
}

}