private void OnItemAppearing(object sender, ItemVisibilityEventArgs e)
{
if (ItemAppearingCommand != null)
{
ItemAppearingCommand?.Execute(e.Item);
}
}
private void OnItemAppearing(object sender, ItemVisibilityEventArgs e)
{
if (ItemAppearingCommand != null)
{
ItemAppearingCommand?.Execute(e.Item);
}
if (LoadMoreCommand != null)
{
if (IsGroupingEnabled)
{
if (PageSize == null)
{
var firstItem = ((IList)ItemsSource.Cast <object>().First()).Cast <object>().First();
if (e.Item == firstItem && !IsRefreshing)
{
LoadMoreCommand?.Execute(null);
}
}
else
{
var firstItem = ((IList)ItemsSource.Cast <object>().First()).Cast <object>().First();
var totalItems = 0;
foreach (var item in ItemsSource.Cast <object>())
{
totalItems = totalItems + ((IList)item).Cast <object>().Count();
}
if (e.Item == firstItem && !IsRefreshing
& totalItems >= PageSize.Value)
{
LoadMoreCommand?.Execute(null);
}
}
}
else
{
if (PageSize == null)
{
if (e.Item == ItemsSource.Cast <object>().First() && !IsRefreshing)
{
LoadMoreCommand?.Execute(null);
}
}
else
{
if (e.Item == ItemsSource.Cast <object>().First() && !IsRefreshing
& ItemsSource.Cast <object>().Count() >= PageSize.Value)
{
LoadMoreCommand?.Execute(null);
}
}
}
}
}
// If the new item that is appearing on the screen is the last one in the
// collection, we execute the LoadMoreCommand so our ViewModel knows we
// want to load more data for our user from the data service.
private void OnItemAppearing(object sender, ItemVisibilityEventArgs e)
{
ItemAppearingCommand?.Execute(e.Item);
//If its the last item execute command and load more data.
if (e.Item == ItemsSource.Cast <object>().Last())
{
LoadMoreCommand?.Execute(null);
}
}
private void OnItemAppearing(object sender, ItemVisibilityEventArgs e)
{
if (ItemAppearingCommand != null)
{
ItemAppearingCommand?.Execute(e.Item);
}
if (LoadMoreCommand != null)
{
if (e.Item == ItemsSource.Cast <object>().Last())
{
LoadMoreCommand?.Execute(null);
}
}
}