ListView的问题

Question

开发环境是2.0  VS2008  WIN7
实现ListView的拖拽功能
 private void listView2_DragOver(object sender, DragEventArgs e)
        {
            Point targetPoint = listView2.PointToClient(new Point(e.X, e.Y));
            int targetIndex = listView2.InsertionMark.NearestIndex(targetPoint);            if (targetIndex > -1)
            {
                Rectangle itemBounds = listView2.GetItemRect(targetIndex);
                if (targetPoint.X > itemBounds.Left + (itemBounds.Width / 2))
                {
                    listView2.InsertionMark.AppearsAfterItem = true;
                }
                else
                {
                    listView2.InsertionMark.AppearsAfterItem = false;
                }
            }
            listView2.InsertionMark.Index = targetIndex;
        }        private void listView2_DragLeave(object sender, EventArgs e)
        {
            listView2.InsertionMark.Index = -1;
        }
        private void listView1_DragEnter(object sender, DragEventArgs e)
        {
            e.Effect = DragDropEffects.Copy;
        }        private void listView1_ItemDrag(object sender, ItemDragEventArgs e)
        {
            ListViewItem[] items = new ListViewItem[listView1.SelectedItems.Count];
            int i = 0;            foreach (ListViewItem item in ((ListView)(sender)).SelectedItems)
            {
                items[i] = item.Clone() as ListViewItem;
                i++;
            }            listView1.DoDragDrop(new DataObject("System.Windows.Forms.ListViewItem()", items), DragDropEffects.Copy);        }
开发下没问题   拿到XP下运行这个功能就没了   
何解？

Answer 1

XP下  InsertionMark  这个值一直为－1 导致只能删除
哪位仁兄 有相关的替换代码