Detect when WPF listview scrollbar is at the bottom?
For UWP I got it like this
<ScrollViewer Name="scroll" ViewChanged="scroll_ViewChanged">
<ListView />
</ScrollViewer>
private void scroll_ViewChanged(object sender, ScrollViewerViewChangedEventArgs e)
{
var scrollViewer = (ScrollViewer)sender;
if (scrollViewer.VerticalOffset == scrollViewer.ScrollableHeight)
btnNewUpdates.Visibility = Visibility.Visible;
}
I figured it out. It seems I should have been getting events from the ScrollBar (<ListView ScrollBar.Scroll="currentTagNotContactsList_Scroll"
in XAML) itself, rather than the viewer. This works, but I just have to figure a way to avoid the event handler being called repeatedly once the scrollbar is down. Maybe a timer would be good:
private void currentTagNotContactsList_Scroll(object sender, ScrollEventArgs e) {
ScrollBar sb = e.OriginalSource as ScrollBar;
if (sb.Orientation == Orientation.Horizontal)
return;
if (sb.Value == sb.Maximum) {
Debug.Print("At the bottom of the list!");
}
}
//A small change in the "Max's" answer to stop the repeatedly call.
//this line to stop the repeatedly call
ScrollViewer.CanContentScroll="False"
private void dtGrid_ScrollChanged(object sender, ScrollChangedEventArgs e)
{
//this is for vertical check & will avoid the call at the load time (first time)
if (e.VerticalChange > 0)
{
if (e.VerticalOffset + e.ViewportHeight == e.ExtentHeight)
{
// Do your Stuff
}
}
}