How to make CollectionView's item loop when scrolling in Xamarin - xamarin.forms

Question

I am using CollectionView to display data by scroll. However, there is a problem that after the data, it scrolls iteratively? Means after I reach the last element, it will show me the first element again. I know CarouselView has a property called loop for that. However, for some reason, I don't use CarouselView. This is the code I used:
PageOne.xaml
<CollectionView x:Name="_data" HeightRequest="115" ItemsUpdatingScrollMode="KeepItemsInView" HorizontalScrollBarVisibility="Never" VerticalScrollBarVisibility="Never" Scrolled="_data_Scrolled">
<CollectionView.ItemsLayout>
<LinearItemsLayout Orientation="Horizontal" SnapPointsType="MandatorySingle" SnapPointsAlignment="Start" />
</CollectionView.ItemsLayout>
<CollectionView.ItemTemplate>
<DataTemplate>
<StackLayout Orientation="Horizontal" HorizontalOptions="FillAndExpand">
...
</StackLayout>
</DataTemplate>
</CollectionView.ItemTemplate>
</CollectionView>
PageOne.xaml.cs
Do I autorun items in CollectionView
....
Device.StartTimer(TimeSpan.FromSeconds(4), (Func<bool>)(() =>
{
_data.ScrollTo(listData.Count + 2, -1, ScrollToPosition.Start, true);
//return true;
}));
In my code, check the _data_Scrolled event when the last element is reached
private void _data_Scrolled(object sender, ItemsViewScrolledEventArgs e)
{
if(e.LastVisibleItemIndex + 1 == countHotSeling)
{
Device.StartTimer(TimeSpan.FromSeconds(4), (Func<bool>)(() =>
{
_data.ScrollTo(listData.Count - 2, +1, ScrollToPosition.Start, true);
return true;
}));
}
}
When t debug, it actually jumps to the event when the last element is reached. However, it does not loop?
Looking forward to everyone's help. Thank you!

Answer 1

You can use the ​RemainingItemsThresholdReached​ event to load more items by setting the ​RemainingItemsThreshold​ parameter when reaching the last item. However, since the items in Collectionview are not listed in order so we can't reach the last element.We only can replicate the _data.
Here is the code sample below for your reference:
public Test2()
{
InitializeComponent();
LoadData();
_data.RemainingItemsThreshold = 13;
_data.RemainingItemsThresholdReached += _data_RemainingItemsThresholdReached;
}
private async void _data_RemainingItemsThresholdReached(object sender, EventArgs e)
{
var monkeyJson = await httpClient.GetStringAsync(monkeyUrl);
var monkeys = JsonConvert.DeserializeObject<Monkey[]>(monkeyJson);
foreach (var monkey in monkeys)
{
Monkeys.Add(monkey);
count++;
}
_listProd = Monkeys.ToList();
_data.ItemsSource = _listProd;
}
Reference link:https://learn.microsoft.com/en-us/xamarin/xamarin-forms/user-interface/collectionview/populate-data#load-data-incrementally