winform treeview的问题

Question

我有个文件夹，里面有多个文件夹和记事本文件，我现在要把他们读到treeview里面，右击treeview节点有 添加文件夹，添加文件，修改文件等菜单，单击treeview的文件夹节点展开，单击记事本文件就在一个文本框里显示出来。求个思路，有个小demo就更好了分不多了，大虾帮忙。

Answer 1

这个并不复杂
FileInfo 类操作文件 改名删除操作StreamReader 来读取txt 文件using System;
using System.IO;class Test 
{
    public static void Main() 
    {
        try 
        {
            // Create an instance of StreamReader to read from a file.
            // The using statement also closes the StreamReader.
            using (StreamReader sr = new StreamReader("TestFile.txt")) 
            {
                string line;
                // Read and display lines from the file until the end of 
                // the file is reached.
                while ((line = sr.ReadLine()) != null) 
                {
                    Console.WriteLine(line);
                }
            }
        }
        catch (Exception e) 
        {
            // Let the user know what went wrong.
            Console.WriteLine("The file could not be read:");
            Console.WriteLine(e.Message);
        }
    }
}

Answer 2

        /// <summary>
        /// 此方法映射磁盘
        /// </summary>
        public void reflectDriver()
        {
            DriveInfo[] dr = DriveInfo.GetDrives();
            string driveName = "";
            foreach (DriveInfo d in dr)
            {
                switch (d.DriveType)
                {
                    case DriveType.Fixed:
                        driveName = "本地磁盘(" + d.Name.Substring(0, 2) + ")";
                        break;
                    case DriveType.Removable:
                        driveName = "可移动磁盘(" + d.Name.Substring(0, 2) + ")";
                        break;
                    case DriveType.CDRom:
                        driveName = "DVD驱动器(" + d.Name.Substring(0, 2) + ")";
                        break;
                    case DriveType.Network:
                        driveName = "网络驱动器(" + d.Name.Substring(0, 2) + ")";
                        break;
                    default:
                        driveName = "未知(" + d.Name + ")";
                        break;
                }
                this.treeView1.Nodes.Add(d.Name, driveName);
            }
        }
//调用
 private void button6_Click(object sender, EventArgs e)
        {
            reflectDriver();
        }

Answer 3

续
        private void treeView1_NodeMouseClick(object sender, TreeNodeMouseClickEventArgs e)
        {
            if (e.Node.Nodes.Count > 0)
            {
                if (e.Node.IsExpanded)
                {
                    e.Node.Collapse();                }
                else
                {
                    e.Node.Expand();
                }
            }
            else
            {
                if (Directory.Exists(e.Node.Name))
                {
                    try
                    {
                        string[] allDirectory = Directory.GetDirectories(e.Node.Name);
                        foreach (string s in allDirectory)
                        {
                            e.Node.Nodes.Add(s, s.Remove(0, s.LastIndexOf("\\") + 1));
                        }
                        listBox1.Items.Clear();
                        string[] allFiles = Directory.GetFiles(e.Node.Name);
                        foreach (string sf in allFiles)
                        {
                            //listBox1.Items.Add(sf.Remove(0, sf.LastIndexOf("\\") + 1));
                            listBox1.Items.Add(sf);
                            listBox1.SelectedIndexChanged += new EventHandler(listBox1_SelectedIndexChanged);
                         }
                    }
                    catch
                    {
                    }
                }
                e.Node.Expand();
            }
        }        void listBox1_SelectedIndexChanged(object sender, EventArgs e)
        {
            string path = listBox1.Items[1].ToString();
            StreamReader sr = new StreamReader(path, Encoding.GetEncoding("gb2312"));//读取文件            string str = null;
            while ((str = sr.ReadLine()) != null)//判断行
            {
                listBox1.Items.Add(str);
            }
        }