按特定值中的值对 ListView 或 ListView.ItemTemplate 进行排序

Question

I trying to sort or order a ListView by a value in a specific, for example by date but I haven't anything like that, I want sort the values from an API, for example by Date, but there are Notices of type Important and No important, I did it in a Grid on the Web

I have to do the same but in a ListView in Xamarin

My ListView:

<ListView  x:Name="ItemsListView" RefreshCommand="{Binding LoadItemsCommand}" IsRefreshing="{Binding IsBusy, Mode=OneWay}" SeparatorVisibility="None" Style="{ StaticResource ResponsiveLandscapeMarginStyle }" ItemsSource="{ Binding Messages }">
    <ListView.RowHeight>
        <OnIdiom x:TypeArguments="x:Int32" Phone="120" Tablet="160" />
    </ListView.RowHeight>

<ListView.ItemTemplate>
    <DataTemplate>
        <ViewCell>

            <local:DataItemTemplate />

        </ViewCell>
    </DataTemplate>
</ListView.ItemTemplate>

My ViewModel:

    public ObservableCollection<Notice> Messages { get; set; }
    public Command LoadItemsCommand { get; set; }
    public Command LoadHighImportantItems { get; set; }

    public Notice Message { get; set; }
    public Command UpdateMessage { get; }
   
    public NoticeViewModel()
    {
        Messages = new ObservableCollection<Notice>();
        LoadItemsCommand = new Command(async () => await ExecuteLoadItemsCommand());
        LoadHighImportantItems = new Command(() => ExecuteLoadHighImportantItemsCommand());
        UpdateMessage = new Command(() => ExecuteUpdateRead());
    }

    async Task ExecuteLoadItemsCommand()
    {

        if (IsBusy)
            return;
        IsBusy = true;

        try
        {
            var serviceStore = new ServiceStoreAPI();
            await serviceStore.GetItemsAsync(ServicesKey.Event,true);
            await serviceStore.GetItemsAsync(ServicesKey.EmployeeServicesRequests, true);
            await serviceStore.GetItemsAsync(ServicesKey.Raffle, true);
            new EmployeeServicesRequestsViewModel().LoadItemsCommand.Execute(null);
            new RaffleViewModel().LoadItemsCommand.Execute(null);
            Messages.Clear();
            var items = await NoticeStore.GetItemsAsync(true);

            foreach (var item in items)
                Messages.Add(item);
        }
        catch (Exception ex)
        {
            Debug.WriteLine(ex);
        }
        finally
        {
            IsBusy = false;
        }
    }

Is there a way to sort by date or by any value, to display the values in the ListView?

Answer 1

I tried this

foreach (var item in items.OrderByDescending(d => d.Date)
  Messages.Add(item);

Answer 2

I would us a CollectionViewSource to order output:

<CollectionViewSource x:Key="SortedComboBoxItems" Source="{Binding Path=ComboBoxItems}">
    <CollectionViewSource.SortDescriptions>
        <componentModel:SortDescription PropertyName="Order" />
    </CollectionViewSource.SortDescriptions>
</CollectionViewSource>