<pre class="brush:c#; toolbar: true; auto-links: false;">        private void listbox1_MouseMove(object sender, MouseEventArgs e)         {             if (Result[0] == "1")             {                 //获取listbox的子类型ScrollViewer                             ScrollViewer scrollViewer = FindChildOfType<ScrollViewer>((ListBox)sender);                 if (scrollViewer == null)                 {                     throw new InvalidOperationException("erro");                 }                 else                 {                     //判断当前滚动的高度是否大于或者等于scrollViewer实际可滚动高度，如果等于或者大于就证明到底了                     if ((scrollViewer.VerticalOffset + 1) >= scrollViewer.ScrollableHeight)                     {                         MessageBox.Show("aaa");                     }                 }             }         }          //获取子类型                 public static T FindChildOfType<T>(DependencyObject root) where T : class         {             var queue = new Queue<DependencyObject>();             queue.Enqueue(root);             while (queue.Count > 0)             {                 DependencyObject current = queue.Dequeue();                 for (int i = VisualTreeHelper.GetChildrenCount(current) - 1; 0 <= i; i--)                 {                     var child = VisualTreeHelper.GetChild(current, i);                     var typedChild = child as T;                     if (typedChild != null)                     {                         return typedChild;                     }                     queue.Enqueue(child);                 }             }             return null;         }</pre>    <br />