将文件夹层次显示在treeview控件中

private void Form1_Load(object sender, EventArgs e)

        {

            string rootpath = @"E:\config";

            DirectoryInfo dir = new DirectoryInfo(rootpath);

            TreeNode rootnode = new TreeNode();

            rootnode.Text = "任务列表";

            treeView1.Nodes.Add(rootnode);



            Recursion(dir, rootnode);

        }



        private void Recursion(DirectoryInfo dirParent, TreeNode tnParent)

        {

            DirectoryInfo[] dirarr = dirParent.GetDirectories();

            if (dirarr == null) return;//若无子文件夹则退出

            foreach (DirectoryInfo diri in dirarr)

            {

                TreeNode siteNode = new TreeNode();

                siteNode.Text = diri.Name;

                siteNode.Name = diri.FullName;

                tnParent.Nodes.Add(siteNode);



                Recursion(diri, siteNode);//递归

            }

        }

    }