TreeView中拖放TreeNode的实现

private void treeView2_DragDrop(object sender, System.Windows.Forms.DragEventArgs e)
{
TreeNode newNode;
if (e.Data.GetDataPresent("System.Windows.Forms.TreeNode", false))
{
Point pt;
TreeNode destinationNode;
pt = treeView2.PointToClient(new Point(e.X, e.Y));
destinationNode = treeView2.GetNodeAt(pt);
newNode = (TreeNode) e.Data.GetData("System.Windows.Forms.TreeNode");
if (!destinationNode.Equals(newNode))
{
//destinationNode.Nodes.Add(newNode.Clone());
            destinationNode.Nodes.Add((TreeNode) newNode.Clone());
destinationNode.Expand();
//Remove original node
            newNode.Remove();
}
}
}
private void treeView2_DragEnter(object sender, System.Windows.Forms.DragEventArgs e)
{
e.Effect = DragDropEffects.Move;
}
private void treeView2_ItemDrag(object sender, System.Windows.Forms.ItemDragEventArgs e)
{
DoDragDrop(e.Item, DragDropEffects.Move);
}