How to know the position of the wpf listbox's slider?

Question

WPF

You need to load the elements in the listbox if the slider is scrolled all the way down / up. How to track this position?

Answer 1

You can subscribe to the ScrollChangedEvent routed event . The ScrollChangedEventArgs event argument has detailed information about the scroll. If this is not enough - use the OrigianSource property, which points to a ScrollViewer , from which you can already request the current HorizontalOffset and VerticalOffset

Answer 2

Probably the most convenient way would be to hook on Track: https://docs.microsoft.com/ru-ru/dotnet/api/system...
Or Thumb: https://docs.microsoft.com/ru-ru/dotnet/api /system...
which is the ScrollBar slider: https://docs.microsoft.com/ru-ru/dotnet/api/system...
but then it will turn out, reacting to OnDragComplete to react to scrolling only with the slider