wpf datagrid-由于拖放,无法使用鼠标滚动

我正在使用允许拖动其行的数据报。我的问题是,当我试图用侧边滚动条上的鼠标在网格上向下滚动时,我得到了“禁止进入”标志,这意味着“这里不允许拖放,伙计…”。如何修改拖放功能以识别这不是拖放操作,而是滚动鼠标操作?

private new void MouseMove(object sender, MouseEventArgs e)
    {
        if (e.LeftButton == MouseButtonState.Pressed)
        {
            Point currentPosition = e.GetPosition(GridUC);

            Object selectedItem = GridUC.SelectedItem;

            if (selectedItem == null) return;

            DragDropContainerObject ddObject = new DragDropContainerObject(typeof(Actor), selectedItem);

            DataGridRow container = (DataGridRow)GridUC.ItemContainerGenerator.ContainerFromItem(selectedItem);

            if (container != null)
            {
                DragDropEffects finalDropEffect = DragDrop.DoDragDrop(container, ddObject, DragDropEffects.Link);
            }
        }

    }