Hello,
I created a simple ListBox and bound it to some ObservableCollection and I'd like the listbox to autoscroll when I'm adding item to the source collection. Since I'm really into WPF UI/data separation, my data source object doesn't know anything about the ListBox (so it cannot call ListBox.ScrollIntoView on each item add).
The easiest way I could come to seems to be extremally tricky for such a trivial task. Something like this:
Another way would be to "listen" to ItemSource changes for my ListBox/ListView but this is as tricky as the sample above (and would also bring UI/data separation because this way ListBox should know some stuff about its data source)
There are several other ways to achieve the same thing, but they are even more tricky (e.g. sit on ItemContainerGenerator events, or find ScrollViewer in the visual tree and play with its scroll offset etc.).
Am I missing something or there's really no straightforward way to do such a common task in WPF?
Thanks,
Boris.
I created a simple ListBox and bound it to some ObservableCollection and I'd like the listbox to autoscroll when I'm adding item to the source collection. Since I'm really into WPF UI/data separation, my data source object doesn't know anything about the ListBox (so it cannot call ListBox.ScrollIntoView on each item add).
The easiest way I could come to seems to be extremally tricky for such a trivial task. Something like this:
| <ListBox Name="lb" ItemsSource="{Binding Path=Data}" VirtualizingStackPanel.IsVirtualizing="False"/> |
| lb.IsSynchronizedWithCurrentItem = true; |
| lb.SelectionChanged += (s, e1) => { lb.ScrollIntoView(lb.Items[lb.Items.Count-1]); }; |
| // on every Add to the source collection: |
| ..Data.Add(“blablabla”); |
| CollectionViewSource.GetDefaultView(..Data).MoveCurrentToLast(); |
Another way would be to "listen" to ItemSource changes for my ListBox/ListView but this is as tricky as the sample above (and would also bring UI/data separation because this way ListBox should know some stuff about its data source)
There are several other ways to achieve the same thing, but they are even more tricky (e.g. sit on ItemContainerGenerator events, or find ScrollViewer in the visual tree and play with its scroll offset etc.).
Am I missing something or there's really no straightforward way to do such a common task in WPF?
Thanks,
Boris.