listview与treeview拖动问题

Question

 private void lsvScan_ItemDrag(object sender, ItemDragEventArgs e)
        {
            try
            {
                this.DoDragDrop(e.Item, DragDropEffects.Move);
            }
            catch (Exception)
            {
            }
        }        private void lsvScan_DragEnter(object sender, DragEventArgs e)
        {
            try
            {
                e.Effect = DragDropEffects.Move;
            }
            catch (Exception)
            {
            }
        }        private void trvClassify_DragEnter(object sender, DragEventArgs e)
        {
            ListViewItem lvi = (ListViewItem)e.Data.GetData(typeof(ListViewItem));
            if (lvi != null)
            {
                e.Effect = DragDropEffects.Move;
            }
            else
            {
                Cursor = Cursors.No;
            }
        }        private void trvClassify_DragDrop(object sender, DragEventArgs e)
        {
            ListViewItem lvi = (ListViewItem)e.Data.GetData(typeof(ListViewItem));            Point pt;
            TreeNode targeNode;
            pt = ((TreeView)(sender)).PointToClient(new Point(e.X, e.Y));
            targeNode = this.trvClassify.GetNodeAt(pt);
            TreeNode NewMoveNode = new TreeNode(lvi.Text);
            if (targeNode != null)
            {
                this.trvClassify.Nodes.Add(NewMoveNode);
                trvClassify.SelectedNode = NewMoveNode;
                trvClassify.ExpandAll();
                trvClassify.Refresh();
            }
        }我想在从listview 中拖动到treeview中的时候将从listview中拖出的item放到treeview选中的节点下。

Answer 1

现在情况是没拖动到treeview一个item treeview中都会从新创建一个根节点！