白给分了。哎

大白天，人家都上班，谁有时间给你写这个东西啊！你好好看看基础也学会了，工作后都不怎么用系统自带的控件了，都是第三方插件。
周五了，我写了一个不知道行不行，

//构造一个TreeView成员
 public void  LoadData()
        {
            TreeNode node = new TreeNode("祖宗");
            this.treeView1.Nodes.Add(node);
            TreeNode Gnode = new TreeNode("爷爷");
            node.Nodes.Add(Gnode);
            TreeNode Fnode = new TreeNode("爸爸");
            Gnode.Nodes.Add(Fnode);
            TreeNode Snode = new TreeNode("儿子");
            TreeNode Snode1 = new TreeNode("儿子1");
            Fnode.Nodes.Add(Snode);
            Fnode.Nodes.Add(Snode1);
            TreeNode node1 = new TreeNode("祖宗");
            this.treeView1.Nodes.Add(node1);
            TreeNode Gnode1 = new TreeNode("爷爷");
            node1.Nodes.Add(Gnode1);
            TreeNode Fnode1 = new TreeNode("爸爸");
            Gnode1.Nodes.Add(Fnode1);
            TreeNode Snode2 = new TreeNode("儿子");
            TreeNode Snode3 = new TreeNode("儿子1");
            Fnode1.Nodes.Add(Snode2);
            Fnode1.Nodes.Add(Snode3);
        }

//加载窗体时显示
 private void Form1_Load(object sender, EventArgs e)
        {
            LoadData();
            
        }

 string[] str=new string[100];
        int i = 0;
//遍历节点
        public void GetLastNode(TreeNode node)
        {
            if(node.Nodes.Count==0)
                str[i++]=node.Text;
            else
            {
                for (int k = 0; k < node.Nodes.Count; k++)
                {
                    GetLastNode(node.Nodes[k]);
                }
            }
                 
        }

//显示最后一个节点出结果
        private void button1_Click(object sender, EventArgs e)
        {
            for (int i = 0; i < this.treeView1.Nodes.Count; i++)
            {
                GetLastNode(this.treeView1.Nodes[i]);
            }
            for (int k = 0; k < i; k++)
            {
                MessageBox.Show(str[k]);
            }
        }

感觉此论坛好冷清哦。