windows文件系统左侧那样的导航栏是怎么作出来的？

Question

如题，请教一下！

Answer 1

using System;
using System.Text;
using System.Drawing;
using System.Collections;
using System.ComponentModel;
using System.IO;
using System.Windows.Forms;
using System.Data;
using System.Xml;
using System.Runtime.InteropServices; namespace CSharpWinForm
{
    /**//// <summary>
    /// Form1 的摘要说明。
    /// </summary>
    public class Form1 : System.Windows.Forms.Form
    {
        private System.Windows.Forms.TreeView treeView1;
        private System.Windows.Forms.TextBox textBox1;
        private System.Windows.Forms.ListView listView1;
        private System.Windows.Forms.ColumnHeader columnHeader1;
        private System.Windows.Forms.ColumnHeader columnHeader2;
        private System.Windows.Forms.ColumnHeader columnHeader3;
        private System.Windows.Forms.ColumnHeader columnHeader4;
        private System.Windows.Forms.Splitter splitter1;         private DirectoryInfo folder; // 用于保存目录信息 
        private static string driveLetters = "ABCDEFGHIJKLMNOPQRSTUVWXYZ";
        private System.Windows.Forms.MainMenu mainMenu1;
        private System.Windows.Forms.MenuItem menuItem1;
        private System.Windows.Forms.MenuItem menuItem2;
        private System.Data.Odbc.OdbcConnection odbcConnection1;     // 用于列举驱动器盘符 
        /**//// <summary>
        /// 必需的设计器变量。
        /// </summary>
        private System.ComponentModel.Container components = null;        public Form1()
        {
            //
            // Windows 窗体设计器支持所必需的
            //
            InitializeComponent();            //
            // TODO: 在 InitializeComponent 调用后添加任何构造函数代码
            //
        }        /**//// <summary>
        /// 清理所有正在使用的资源。
        /// </summary>
        protected override void Dispose( bool disposing )
        {
            if( disposing )
            {
                if (components != null) 
                {
                    components.Dispose();
                }
            }
            base.Dispose( disposing );
        }        Windows 窗体设计器生成的代码#region Windows 窗体设计器生成的代码
        /**//// <summary>
        /// 设计器支持所需的方法 - 不要使用代码编辑器修改
        /// 此方法的内容。
        /// </summary>
        private void InitializeComponent()
        {
            this.treeView1 = new System.Windows.Forms.TreeView();
            this.textBox1 = new System.Windows.Forms.TextBox();
            this.listView1 = new System.Windows.Forms.ListView();
            this.columnHeader1 = new System.Windows.Forms.ColumnHeader();
            this.columnHeader2 = new System.Windows.Forms.ColumnHeader();
            this.columnHeader3 = new System.Windows.Forms.ColumnHeader();
            this.columnHeader4 = new System.Windows.Forms.ColumnHeader();
            this.splitter1 = new System.Windows.Forms.Splitter();
            this.mainMenu1 = new System.Windows.Forms.MainMenu();
            this.menuItem1 = new System.Windows.Forms.MenuItem();
            this.menuItem2 = new System.Windows.Forms.MenuItem();
            this.odbcConnection1 = new System.Data.Odbc.OdbcConnection();
            this.SuspendLayout();
            // 
            // treeView1
            // 
            this.treeView1.Dock = System.Windows.Forms.DockStyle.Left;
            this.treeView1.ImageIndex = -1;
            this.treeView1.Location = new System.Drawing.Point(0, 0);
            this.treeView1.Name = "treeView1";
            this.treeView1.SelectedImageIndex = -1;
            this.treeView1.Size = new System.Drawing.Size(200, 573);
            this.treeView1.TabIndex = 0;
            this.treeView1.BeforeSelect += new System.Windows.Forms.TreeViewCancelEventHandler(this.treeView1_BeforeSelect);
            this.treeView1.BeforeExpand += new System.Windows.Forms.TreeViewCancelEventHandler(this.treeView1_BeforeExpand);
            // 
            // textBox1
            // 
            this.textBox1.Dock = System.Windows.Forms.DockStyle.Top;
            this.textBox1.Location = new System.Drawing.Point(200, 0);
            this.textBox1.Name = "textBox1";
            this.textBox1.Size = new System.Drawing.Size(592, 21);
            this.textBox1.TabIndex = 1;
            this.textBox1.Text = "textBox1";
            // 
            // listView1
            // 
            this.listView1.Columns.AddRange(new System.Windows.Forms.ColumnHeader[] {
                                                                                        this.columnHeader1,
                                                                                        this.columnHeader2,
                                                                                        this.columnHeader3,
                                                                                        this.columnHeader4});
            this.listView1.Dock = System.Windows.Forms.DockStyle.Fill;
            this.listView1.Location = new System.Drawing.Point(200, 21);
            this.listView1.Name = "listView1";
            this.listView1.Size = new System.Drawing.Size(592, 552);
            this.listView1.TabIndex = 2;
            this.listView1.View = System.Windows.Forms.View.Details;
            // 
            // columnHeader1
            // 
            this.columnHeader1.Text = "名称";
            this.columnHeader1.Width = 120;
            // 
            // columnHeader2
            // 
            this.columnHeader2.Text = "大小";
            this.columnHeader2.Width = 100;
            // 
            // columnHeader3
            // 
            this.columnHeader3.Text = "类型";
            this.columnHeader3.Width = 120;
            // 
            // columnHeader4
            // 
            this.columnHeader4.Text = "时间";
            this.columnHeader4.Width = 140;
            // 
            // splitter1
            // 
            this.splitter1.Location = new System.Drawing.Point(200, 21);
            this.splitter1.Name = "splitter1";
            this.splitter1.Size = new System.Drawing.Size(3, 552);
            this.splitter1.TabIndex = 3;
            this.splitter1.TabStop = false;
            // 
            // mainMenu1
            // 
            this.mainMenu1.MenuItems.AddRange(new System.Windows.Forms.MenuItem[] {
                                                                                      this.menuItem1});
            // 
            // menuItem1
            // 
            this.menuItem1.Index = 0;
            this.menuItem1.MenuItems.AddRange(new System.Windows.Forms.MenuItem[] {
                                                                                      this.menuItem2});
            this.menuItem1.Text = "文件";
            // 
            // menuItem2
            // 
            this.menuItem2.Index = 0;
            this.menuItem2.Text = "新建";
            // 
            // Form1
            // 
            this.AutoScaleBaseSize = new System.Drawing.Size(6, 14);
            this.ClientSize = new System.Drawing.Size(792, 573);
            this.Controls.Add(this.splitter1);
            this.Controls.Add(this.listView1);
            this.Controls.Add(this.textBox1);
            this.Controls.Add(this.treeView1);
            this.Menu = this.mainMenu1;
            this.Name = "Form1";
            this.Text = "Form1";
            this.ResumeLayout(false);        }
        #endregion

Answer 2

        /**//// <summary>
        /// 应用程序的主入口点。
        /// </summary>
        [STAThread]
        static void Main() 
        {
            Application.Run(new Form1());
        }        private void fillTree(TreeView tv) 
        { 
            DirectoryInfo directory; 
            string sCurPath = ""; // 重新清空 
            tv.Nodes.Clear();             // 将硬盘上的所有的驱动器都列举出来 
            foreach( char c in driveLetters ) 
            { 
                sCurPath = c + ":\\"; 
                try 
                { 
                    // 获得该路径的目录信息 
                    directory = new DirectoryInfo(sCurPath);                     // 如果获得的目录信息正确，则将它添加到目录树视中 
                    if ( directory.Exists == true ) 
                    { 
                        TreeNode newNode = new TreeNode(directory.FullName); 
                        tv.Nodes.Add(newNode); // 添加新的节点到根节点 
                        getSubDirs(newNode); 
                        // 调用getSubDirs（）函数，检查该驱动器上的任何存在子目录 
                    } 
                } 
                catch( Exception doh) 
                { 
                    Console.WriteLine(doh.Message); 
                } 
            } 
        }         private void getSubDirs( TreeNode parent ) 
        { 
            DirectoryInfo directory; 
            try 
            { 
                // 如果还没有检查过这个文件夹，则检查之 
                if ( parent.Nodes.Count == 0 ) 
                { 
                    directory = new DirectoryInfo(parent.FullPath); 
                    foreach( DirectoryInfo dir in directory.GetDirectories()) 
                    { 
                        // 新建一个数节点，并添加到目录树视 
                        TreeNode newNode = new TreeNode(dir.Name); 
                        parent.Nodes.Add(newNode); 
                    } 
                }                 foreach(TreeNode node in parent.Nodes) 
                { 
                    // 如果还没有检查过这个文件夹，则检查 
                    if (node.Nodes.Count == 0) 
                    { 
                        directory = new DirectoryInfo(node.FullPath);                         // 检查该目录上的任何子目录 
                        foreach( DirectoryInfo dir in directory.GetDirectories()) 
                        { 
                            // 新建一个数节点，并添加到目录树视 
                            TreeNode newNode = new TreeNode(dir.Name); 
                            node.Nodes.Add(newNode); 
                        } 
                    } 
                } 
            } 
            catch( Exception doh ) 
            { 
                Console.WriteLine(doh.Message); 
            } 
        }         private void fillListView(ListView lv, string strPath)
        {
            DirectoryInfo directory = new DirectoryInfo(strPath);
            lv.Items.Clear();
            foreach( DirectoryInfo dir in directory.GetDirectories()) 
            { 
                ListViewItem item = new ListViewItem(dir.Name);
                item.SubItems.Add(string.Empty);
                item.SubItems.Add("文件夹");
                item.SubItems.Add(string.Empty);
                lv.Items.Add(item);
            } 
            foreach(FileInfo file in directory.GetFiles()) 
            { 
                ListViewItem item = new ListViewItem(file.Name);
                item.SubItems.Add((file.Length / 1024).ToString() + " KB");
                item.SubItems.Add(file.Extension + "文件");
                item.SubItems.Add(file.LastWriteTime.ToString());
                lv.Items.Add(item);
            } 
        }        private string fixPath( TreeNode node ) 
        { 
            string sRet = ""; 
            try 
            { 
                sRet = node.FullPath; 
                int index = sRet.IndexOf("\\\\"); 
                if (index > 1 ) 
                { 
                    sRet = node.FullPath.Remove(index, 1); 
                } 
            } 
            catch( Exception doh ) 
            { 
                Console.WriteLine(doh.Message); 
            } 
            return sRet; 
        }        private void treeView1_BeforeSelect(object sender, System.Windows.Forms.TreeViewCancelEventArgs e) 
        { 
            getSubDirs(e.Node); // 取得选择节点的子文件夹 
            textBox1.Text = fixPath(e.Node); // 更新文本框内容 
            folder = new DirectoryInfo(e.Node.FullPath); // 获得它的目录信息
            fillListView(listView1, fixPath(e.Node));
        }         private void treeView1_BeforeExpand(object sender, System.Windows.Forms.TreeViewCancelEventArgs e) 
        { 
            getSubDirs(e.Node); // 取得选择节点的子文件夹 
            textBox1.Text = fixPath(e.Node); // 更新文本框内容 
            folder = new DirectoryInfo(e.Node.FullPath); // 获得它的目录信息 
        }
    }
}