public ViewModel7357()
{
for (var i = 0; i < 50; i++)
{
var model = new Model7357 {
Text = "Item " + i
};
if (i == 49)
{
model.BackgroundColor = Colors.Pink;
}
ItemsSource.Add(model);
}
}
async void CollectionView_RemainingItemsThresholdReached(object sender, System.EventArgs e)
{
if (_isUpdatingSource)
{
return;
}
await _semaphoreSlim.WaitAsync();
try
{
_isUpdatingSource = true;
var itemsSource = ((sender as CollectionView).ItemsSource as ObservableCollection <Model7357>);
var count = itemsSource.Count;
if (count == 100)
{
return;
}
for (var i = count; i < count + 50; i++)
{
var model = new Model7357 {
Text = "Item " + i
};
if (i == 99)
{
model.BackgroundColor = Colors.Pink;
}
itemsSource.Add(model);
}
}
finally
{
_semaphoreSlim.Release();
_isUpdatingSource = false;
}
}