我要生成一棵树，循环写出来了，但是树无法显示，帮我调调吧~很急啊！ 谢谢了！

Question

using System;
using System.Collections;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Text;
using System.Windows.Forms;
using System.IO;
namespace LoopBulidTree
{
    public  partial  class Form1 : Form
    {
        #region 1: 初始化定义数据
        string aimFilePath = @"我的电脑\C:\Documents and Settings\foven\桌面\File Test";
        int arraySymbol = 1;     //初始化层数
        object[][] sumArray = new object[20][];   // 综合各层文件夹的 FullName
        ArrayList sonList = new ArrayList();  //存放一层的子文件夹的地址；
        #endregion
        public Form1()
        {
            InitializeComponent();
            BulidRoot();//初始化节点列表          
            for (int i = 1; i < 8;i++ )
            {
                SetParentNode(sumArray[i],false);               
            }
        }
        public string GetFileName(string str)       // (从完整路径) 取出文件夹的名称
        {
            string name = str.Remove(0, (str.LastIndexOf(@"\") + 1));
            return name;
        }        public void BulidRoot()  // 建立 根节点
        {
           sumArray[0] = new object[] { aimFilePath };
            TreeNode rootNode = new TreeNode(GetFileName(aimFilePath));
            treeView1.Nodes.Add(aimFilePath);
            SetParentNode(sumArray[0],true);         
        }        public void SetNode_LayerArray(object[] sonNodeArray)          //节点_层次 二维数组
        { 
            sumArray [arraySymbol] = sonNodeArray;
            arraySymbol++;                                             //  本层已完 换下层
            sonList.Clear();
        }        public void SetParentNode(object[] parentArray, bool rootPathJudge)
        {          
            for (int i = 0; i < parentArray.Length; i++)
            {
                bool loopFinish;
                string parentPath = parentArray[i].ToString();
                if (rootPathJudge)
                { parentPath = parentPath.Remove(0, 5); }
                TreeNode pNode = new TreeNode(parentPath);    //问题好想出在这里 是新建了一个节点 而不是取出已添加的节点  我想不出办法了
                if (i == parentArray.Length - 1) { loopFinish = true; }
                else { loopFinish = false; }
                AddSonNode(parentPath, pNode, loopFinish);
            }
        }       
        public void AddSonNode(string upPath,TreeNode tn,bool flag)
        {
            tn.Nodes.Clear();
            //获得当前目录
            DirectoryInfo dirinfo = new DirectoryInfo(upPath);
            DirectoryInfo[] adirinfo;
            try
            {
                adirinfo = dirinfo.GetDirectories();
            }
            catch
            { return; }           
            foreach (DirectoryInfo di in adirinfo)
            {
                TreeNode tnDir = new TreeNode(di.Name, 4, 5);
                tn.Nodes.Add(tnDir);
                 sonList.Add(di.FullName);
           }
            if (flag)    // 本层父节点扫描完毕
            {
                object[] sonArry = sonList.ToArray();              
                SetNode_LayerArray(sonArry);          
            }
        }
    }
}  VS 2005 C# 里面建个应用程序 加个Treeview控件 这个代码就能运行了吧。 我想完成的是 输入一个文件夹的 完全路径 “string aimFilePath = @"我的电脑\C:\Documents and Settings\foven\桌面\File Test";” 然后把这个文件夹的所有子文件夹以树形结构显示在 Treeview 控件上。有些类似与 资源管理器 但不同的是，这里运行后会自动展开全部节点，而不需要去点击各个节点去展开。  
   缠了我几天了，麻烦帮我看下  
       万分感谢！

Answer 1

        private void button1_Click(object sender, EventArgs e)
        {
            DirectoryInfo di = new DirectoryInfo(textBox1.Text);
            if (!di.Exists)
            {
                MessageBox.Show("路径不存在");
                return;
            }
            TreeNode tn = new TreeNode(di.Name);
            tn.Tag = di.FullName;
            treeView1.Nodes.Add(tn);
            AddChildNodes(tn);
            treeView1.ExpandAll();
        }        private void AddChildNodes(TreeNode tn)
        {
            DirectoryInfo di = new DirectoryInfo(tn.Tag.ToString());
            if (!di.Exists)
                return;
            foreach (DirectoryInfo dir in di.GetDirectories("*.*", SearchOption.AllDirectories))
            {
                TreeNode node = new TreeNode(dir.Name);
                node.Tag = dir.FullName;
                tn.Nodes.Add(node);
                AddChildNodes(node);
            }
        }

Answer 2

以前写的一个通过sql server 取远程目录结构的代码，你看着改吧if (TvServerDirectories.SelectedNode.GetNodeCount(false) == 0)
    EnumServerDirectories(TvServerDirectories.SelectedNode);#region DataTable GetServerDirectories(String ParentPath) // 取子目录
        /// <summary>
        /// 取子目录
        /// </summary>
        /// <param name="ParentPath">父附录</param>
        /// <returns>子目录</returns>
        DataTable GetServerDirectories(String ParentPath)
        {
            using (SqlConnection Connection = new SqlConnection(ConnectionString))
            {
                SqlDataAdapter DataAdapter = new SqlDataAdapter("MASTER..XP_SUBDIRS '" + ParentPath + "'", Connection);
                DataTable DT = new DataTable();
                DataAdapter.Fill(DT);
                return DT;
            }
        }
        #endregion        #region void EnumServerDirectories(TreeNode ParentNode) // 加载目录
        /// <summary>
        /// 加载目录
        /// </summary>
        /// <param name="ParentNode">父节点</param>
        void EnumServerDirectories(TreeNode ParentNode)
        {
            TvServerDirectories.SelectedNode = ParentNode;
            String DirectoryPath = ParentNode.Tag.ToString();
            if (ParentNode.Nodes.Count == 0)
            {
                if (DirectoryPath.Substring(DirectoryPath.Length - 1) != "\\")
                    DirectoryPath += "\\";
                try
                {
                    foreach (DataRow DR in GetServerDirectories(DirectoryPath).Rows)
                    {
                        TreeNode TempNode = new TreeNode();
                        TempNode.Text = DR["subDirectory"].ToString();
                        TempNode.Tag = DirectoryPath + DR["subDirectory"].ToString() + "\\";
                        TempNode.ImageIndex = 3;
                        TempNode.SelectedImageIndex = 2;
                        TvServerDirectories.SelectedNode.Nodes.Add(TempNode);
                    }
                }
                catch (Exception)
                {
                }
            }
        }
        #endregion

Answer 3

这是点一次后加载该节点的子节点，如果你想一次载入所有的就
foreach (DataRow DR in GetServerDirectories(DirectoryPath).Rows)
                    {
                        TreeNode TempNode = new TreeNode();
                        TempNode.Text = DR["subDirectory"].ToString();
                        TempNode.Tag = DirectoryPath + DR["subDirectory"].ToString() + "\\";
                        TempNode.ImageIndex = 3;
                        TempNode.SelectedImageIndex = 2;
                        TvServerDirectories.SelectedNode.Nodes.Add(TempNode);
EnumServerDirectories(TempNode); // 递归调用
                    }

Answer 4

ojlovecd 的方法学了 收藏下

Answer 5

private void button1_Click(object sender, EventArgs e)
        {
            DirectoryInfo di = new DirectoryInfo(textBox1.Text);
            if (!di.Exists)
            {
                MessageBox.Show("路径不存在");
                return;
            }
            TreeNode tn = new TreeNode(di.Name);
            tn.Tag = di.FullName;
            treeView1.Nodes.Add(tn);
            AddChildNodes(tn);
            treeView1.ExpandAll();
        }        private void AddChildNodes(TreeNode tn)
        {
            DirectoryInfo di = new DirectoryInfo(tn.Tag.ToString());
            if (!di.Exists)
                return;
            foreach (DirectoryInfo dir in di.GetDirectories("*.*", SearchOption.AllDirectories))
            {
                TreeNode node = new TreeNode(dir.Name);
                node.Tag = dir.FullName;
                tn.Nodes.Add(node);
                AddChildNodes(node);
            }
        }

Answer 6

     呵呵   在次感谢   ojlovecd  提供的方法！  搞定了 结贴！