求救！谁给一个读全盘，但要点击展开的时候才读下一级目录的treeView代码给我啊！！要能运行的！ 谢谢

Question

求救！谁给一个读全盘，但要点击展开的时候才读下一级目录的treeView代码给我啊！！要能运行的！  谢谢 

Answer 1

using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Text;
using System.Windows.Forms;
using System.IO;
namespace GetSystemDirectory
{
    public partial class Form1 : Form
    {
        public Form1()
        {
            InitializeComponent();
            FillTree(this.treeView1, true);
            this.saveFileDialog1.Filter = "(*.txt)|*.txt";
            
        }        private void FillTree(TreeView treeView, bool isSource)
        {
            treeView.Nodes.Clear();
            string[] strDrives = Environment.GetLogicalDrives();
            foreach (string rootDirectoryName in strDrives)
            {
                try
                {
                    DirectoryInfo dir = new DirectoryInfo(rootDirectoryName);
                    if (dir.Exists == true)
                    {
                        TreeNode newNode = new TreeNode(rootDirectoryName);
                        treeView.Nodes.Add(newNode);
                        if (isSource)
                        {
                            GetSubDirectoryNodes(newNode, newNode.Text, true);                        }
                        else
                        {
                            GetSubDirectoryNodes(newNode, newNode.Text, false);
                        }
                    }
                }
                catch(Exception exc)
                {
                    MessageBox.Show(exc.Message);
                }
            }
        }        private void GetSubDirectoryNodes(TreeNode parent, string fullName, bool getFileNames)
        {
            DirectoryInfo dir = new DirectoryInfo(fullName);
            DirectoryInfo[] subDirs = dir.GetDirectories();            foreach (DirectoryInfo subDir in subDirs)
            {
                if ((subDir.Attributes & FileAttributes.Hidden) != 0)
                {
                    continue;
                }                TreeNode subNode = new TreeNode(subDir.Name);
                parent.Nodes.Add(subNode);                GetSubDirectoryNodes(subNode, subDir.FullName, getFileNames);
            }            if (getFileNames)
            {
                FileInfo []files=dir.GetFiles();
                foreach (FileInfo file in files)
                {
                    TreeNode fileNode = new TreeNode(file.Name);
                    parent.Nodes.Add(fileNode);
                }
            }
        }        private void button1_Click(object sender, EventArgs e)
        {
            TreeNode selectNode = this.treeView1.SelectedNode;
            DirectoryInfo info = new DirectoryInfo(selectNode.FullPath);            string[] strArray = new string[4];
            strArray[0] = "完整目录:"+"\n"+info.FullName;
            strArray[1] = "创建时间:"+"\n"+info.CreationTime.ToString();
            strArray[2] ="最近访问时间:"+"\n"+ info.LastAccessTime.ToString();
            strArray[3] = "最近写入时间:"+"\n"+info.LastWriteTime.ToString();            this.richTextBox1.Lines = strArray;            DateTime nowDate = new DateTime();
            nowDate = DateTime.Now;
            this.richTextBox1.Text =this.richTextBox1.Text+"\n"+"当前时间:"+"\n"+ nowDate.ToString();
            
        }        private void button2_Click(object sender, EventArgs e)
        {
            this.richTextBox1.Text = "";
        }        private void button4_Click(object sender, EventArgs e)
        {
            if (this.saveFileDialog1.ShowDialog() == DialogResult.OK)
            {
                this.richTextBox1.SaveFile(this.saveFileDialog1.FileName, RichTextBoxStreamType.PlainText);
            }
        }        private void button3_Click(object sender, EventArgs e)
        {
            this.Close();
        }
    }
}