1  private void listView1_ItemDrag(object sender, System.Windows.Forms.ItemDragEventArgs e)
 2         {
 3             this.DoDragDrop(e.Item,DragDropEffects.Move);
 4         }
 5 
 6         private void listView1_DragEnter(object sender, System.Windows.Forms.DragEventArgs e)
 7         {
 8             e.Effect=DragDropEffects.Move;
 9         }
10 
11         private void treeView1_DragEnter(object sender, System.Windows.Forms.DragEventArgs e)
12         {
13             //判定是否现在拖动的数据是LISTVIEW项
14             ListViewItem lvi = (ListViewItem)e.Data.GetData(typeof(ListViewItem)); 
15             if (lvi != null) 
16             { 
17                 e.Effect = DragDropEffects.Move; 
18             } 
19             else 
20                 Cursor = Cursors.No; 
21 
22         }
23         private void treeView1_DragDrop(object sender, System.Windows.Forms.DragEventArgs e)
24         {
25             //获得拖放中的项
26             ListViewItem lvi = (ListViewItem)e.Data.GetData(typeof(ListViewItem)); 
27 
28             //根据鼠标坐标确定要移动到的目标节点
29             Point pt;
30             TreeNode targeNode;
31             pt = ((TreeView)(sender)).PointToClient(new Point(e.X, e.Y));
32             targeNode = this.treeView1.GetNodeAt(pt);
33             TreeNode NewMoveNode  =new TreeNode(lvi.Text);
34             if(targeNode!=null)//如果目标节点未选中，则添加到一级节点
35             {
36                 targeNode.Nodes.Add(NewMoveNode);
37                 //更新当前拖动的节点选择
38                 treeView1.SelectedNode = NewMoveNode;
39                 //展开目标节点,便于显示拖放效果
40                 targeNode.Expand();
41                 treeView1.Refresh();
42             }
43             else
44             {
45                 this.treeView1.Nodes.Add(NewMoveNode);
46                 //更新当前拖动的节点选择
47                 treeView1.SelectedNode = NewMoveNode;
48                 //展开目标节点,便于显示拖放效果
49                 treeView1.ExpandAll();
50                 treeView1.Refresh();
51             }
52 
53             
54         }