Xamarin Update data inside CollectionView doesn't work

Question

I've a CollectionView inside my Page and a label Name binding with class

<CollectionView Grid.Column="0"
                    Grid.Row="1"
                    SelectionMode="Single"
                    ItemsSource="{Binding MarketplacePackages}">

            <CollectionView.ItemTemplate>
                <DataTemplate>
                    <StackLayout Orientation="Vertical">
                        <Label Text="{Binding Name}" />
                    </StackLayout>
                </DataTemplate>
            </CollectionView.ItemTemplate>
        </CollectionView>

then i've a class Marketplace

public class MarketplacePackage
{
    public string Name { get; set; }
}

and inside my ViewModel i've that

a listView

List<MarketplacePackage> marketplacePackages;
    public List<MarketplacePackage> MarketplacePackages
    {
        get { return marketplacePackages; }
        set { SetProperty(ref marketplacePackages, value); }
    }

a constructor where i initialize the list

public MarketplaceViewModel()
    {
        Catalogue = new Command(onCatalogueClicked);
        MyDevice = new Command(onMyDeviceClicked);
        MyOrders = new Command(onMyOrderdsClicked);

        MarketplacePackages = new List<MarketplacePackage>() {
            new MarketplacePackage()
            {
                Name = catalogueList[0],
            },
            new MarketplacePackage()
            {
                Name = catalogueList[1]
            },
            new MarketplacePackage()
            {
                Name = catalogueList[2]
            },
            new MarketplacePackage()
            {
                Name = catalogueList[3]
            }
        };

        //this works!
        //MarketplacePackages[0].Name = "String";
    }

and when i call onClickMethod i try to change the data inside my listView

private async void onCatalogueClicked()
    {
        MarketplacePackages[0].Name = "String";
    }

Answer 1

Your MarketplacePackage class has to implement the INotifyPropertyChanged interface (or to inherit from ObservableObject if you're using XamarinCommunityToolkit or MvvmHelpers) and notify when the Name property is changed.

e.g.:

public class MarketplacePackage : ObservableObject
{
    string name;
    public string Name { get => name; set => SetProperty(ref name, value); }
}

It works when you set/change the Name property in the constructor of the ViewModel because the View reads the initial values after the constructor is finished.