xaml – 如何检测ListView向上或向下滚动

var sv = (ScrollViewer)VisualTreeHelper.GetChild(VisualTreeHelper.GetChild(this.ListV,0),0);

编辑

正如Romasz建议的那样,一旦你获得了ScrollViewer,就可以使用它的ViewChanged事件来监视它何时滚动以及何时停止.

此外,这是我用于遍历可视树的通用扩展方法：

// The method traverses the visual tree lazily,layer by layer
// and returns the objects of the desired type
public static IEnumerable<T> GetChildrenOfType<T>(this DependencyObject start) where T : class 
{
    var queue = new Queue<DependencyObject>();
    queue.Enqueue(start);

    while (queue.Count > 0) {
        var item = queue.Dequeue();

        var realItem = item as T;
        if (realItem != null) {
             yield return realItem;
        }

        int count = VisualTreeHelper.GetChildrenCount(item);
        for (int i = 0; i < count; i++) {
            queue.Enqueue(VisualTreeHelper.GetChild(item,i));
        }
    }
}

要使用此方法获取ScrollViewer,请执行以下操作：

var sv = yourListView.GetChildrenOfType<ScrollViewer>().First();