WPF Scrollviewer鼠标向上

Question

I have a control that has a ScrollViewer and in the ScrollViewer there is an Image control, what I would like to do is when my ScrollViewer reaches the bottom (see code) I would like to switch to the next Image .

    private void ImageScrollViewer_ScrollChanged(object sender, System.Windows.Controls.ScrollChangedEventArgs e)
{
  var scrollViewer = (ScrollViewer)sender;
  if (!_hasChangedDueToScroll)
  {
    if (scrollViewer.VerticalOffset == scrollViewer.ScrollableHeight && scrollViewer.ScrollableHeight != 0.0)
    {
      if (_pageNo != _maxPageNo - 1)
      {
        ChangePage(_pageNo + 1);
        _hasChangedDueToScroll = true;
        scrollViewer.ScrollToTop();
      }
    }
  }
}

Thing is, the _hasChangedDueToScroll needs to be there so that the code does not just run through all images to the last one, so I want to change _hasChangedDueToScroll when the mouse button is up from the ScrollViewer , but even if i add an event for MouseUp , the event never executes.

Any ideas why that might be?

Thank you

Answer 1

使用PreviewMouseLeftButtonUp而不是MouseUp