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   源码介绍

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using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Linq;
using System.Text;
using System.Windows.Forms;

using System.Data;
using System.IO;
using System.Runtime.InteropServices;


namespace WindowsFormsApplication1
{
    public partial class Form1 : Form
    {
        private System.Windows.Forms.ImageList TreeImageList;
        private System.Windows.Forms.MainMenu mainMenu1;
        private System.Windows.Forms.MenuItem menuItem1;
        private System.Windows.Forms.ListView listView1;
        private System.Windows.Forms.TextBox textBox1;
        private System.Windows.Forms.TreeView treeView1;
        private System.Windows.Forms.Panel panel2;
        private System.Windows.Forms.Panel panel1;
        private System.Windows.Forms.Splitter splitter1;
        private System.Windows.Forms.Button button1;
        private System.Windows.Forms.ImageList LisrimageList;
        private System.Windows.Forms.ImageList LisrimageList2;
        private System.Windows.Forms.StatusBar statusBar1;
        private System.Windows.Forms.StatusBarPanel statusBarPanel1;
        private System.Windows.Forms.StatusBarPanel statusBarPanel2;
        private System.Windows.Forms.MenuItem menuItem2;
        private System.Windows.Forms.MenuItem menuItem3;
        private System.Windows.Forms.MenuItem menuItem4;
        private System.Windows.Forms.MenuItem menuItem5;
        private System.Windows.Forms.MenuItem menuItem6;
        private System.Windows.Forms.MenuItem menuItem7;
        private System.Windows.Forms.Label label1;
        //private System.ComponentModel.IContainer components;




        public Form1()
        {
            //
            // Windows 窗体设计器支持所必需的
            //
            InitializeComponent();

            Icon ic0 = myExtractIcon("%SystemRoot%\\system32\\shell32.dll", 15);
            TreeImageList.Images.Add(ic0);
            Icon ic1 = myExtractIcon("%SystemRoot%\\system32\\shell32.dll", 5);
            TreeImageList.Images.Add(ic1);
            Icon ic2 = myExtractIcon("%SystemRoot%\\system32\\shell32.dll", 7);
            TreeImageList.Images.Add(ic2);
            Icon ic3 = myExtractIcon("%SystemRoot%\\system32\\shell32.dll", 11);
            TreeImageList.Images.Add(ic3);

            Icon ic4 = myExtractIcon("%SystemRoot%\\system32\\shell32.dll", 3);
            TreeImageList.Images.Add(ic4);
            Icon ic5 = myExtractIcon("%SystemRoot%\\system32\\shell32.dll", 4);
            TreeImageList.Images.Add(ic5);
            Icon ic6 = myExtractIcon("%SystemRoot%\\system32\\shell32.dll", 101);
            TreeImageList.Images.Add(ic6);


            GetDrive();
        }


        //*************************************************************************************
        [DllImport("Shell32.dll")]
        public static extern int ExtractIcon(IntPtr h, string strx, int ii);

        [DllImport("Shell32.dll")]
        public static extern int SHGetFileInfo(string pszPath, uint dwFileAttributes, ref SHFILEINFO psfi, uint cbFileInfo, uint uFlags);

        public struct SHFILEINFO
        {
            public IntPtr hIcon;
            public int iIcon;
            public uint dwAttributes;
            public char szDisplayName;
            public char szTypeName;
        }


        string strFilePath = "";
        //************************************************************************************* 

        protected virtual Icon myExtractIcon(string FileName, int iIndex)
        {
            try
            {
                IntPtr hIcon = (IntPtr)ExtractIcon(this.Handle, FileName, iIndex);
                if (!hIcon.Equals(null))
                {
                    Icon icon = Icon.FromHandle(hIcon);
                    return icon;
                }
            }
            catch (Exception ex)
            { MessageBox.Show(ex.Message, "错误提示", 0, MessageBoxIcon.Error); }
            return null;
        }
        //*************************************************************************************

        protected virtual void SetIcon(ImageList imageList, string FileName, bool tf)
        {
            SHFILEINFO fi = new SHFILEINFO();
            if (tf == true)
            {
                int iTotal = (int)SHGetFileInfo(FileName, 0, ref fi, 100, 16640);//SHGFI_ICON|SHGFI_SMALLICON
                try
                {
                    if (iTotal > 0)
                    {
                        Icon ic = Icon.FromHandle(fi.hIcon);
                        imageList.Images.Add(ic);
                        //return ic;
                    }
                }
                catch (Exception ex)
                { MessageBox.Show(ex.Message, "错误提示", 0, MessageBoxIcon.Error); }
            }
            else
            {
                int iTotal = (int)SHGetFileInfo(FileName, 0, ref fi, 100, 257);
                try
                {
                    if (iTotal > 0)
                    {
                        Icon ic = Icon.FromHandle(fi.hIcon);
                        imageList.Images.Add(ic);
                        //return ic;
                    }
                }
                catch (Exception ex)
                { MessageBox.Show(ex.Message, "错误提示", 0, MessageBoxIcon.Error); }
            }
            // return null;
        }
        //*************************************************************************************

        public void GetDrive()
        {
            treeView1.ImageList = TreeImageList;

            treeView1.BeginUpdate();
            treeView1.Nodes.Clear();

            TreeNode RootNode = new TreeNode("我的电脑", 0, 0);
            treeView1.Nodes.Add(RootNode);

            int iImageIndex = 2; int iSelectedIndex = 2;
            string[] astrDrives = Directory.GetLogicalDrives();

            foreach (string str in astrDrives)
            {
                if (str == "A:\\")
                { iImageIndex = 1; iSelectedIndex = 1; }
                else if (str == "G:\\")
                { iImageIndex = 3; iSelectedIndex = 3; }
                else
                { iImageIndex = 2; iSelectedIndex = 2; }

                TreeNode tnDrive = new TreeNode(str, iImageIndex, iSelectedIndex);
                treeView1.Nodes[0].Nodes.Add(tnDrive);
                AddDirectories(tnDrive);

                if (str == "C:\\")
                { treeView1.SelectedNode = tnDrive; }
            }
            treeView1.EndUpdate();
        }
        //*************************************************************************************

        void AddDirectories(TreeNode tn)
        {
            tn.Nodes.Clear();

            string strPath = tn.FullPath;
            strPath = strPath.Remove(0, 5);

            //获得当前目录
            DirectoryInfo dirinfo = new DirectoryInfo(strPath);
            DirectoryInfo[] adirinfo;
            try
            {
                adirinfo = dirinfo.GetDirectories();
            }
            catch
            { return; }

            int iImageIndex = 4; int iSelectedIndex = 5;
            foreach (DirectoryInfo di in adirinfo)
            {
                if (di.Name == "RECYCLER" || di.Name == "RECYCLED" || di.Name == "Recycled")
                { iImageIndex = 6; iSelectedIndex = 6; }
                else
                { iImageIndex = 4; iSelectedIndex = 5; }

                TreeNode tnDir = new TreeNode(di.Name, iImageIndex, iSelectedIndex);
                tn.Nodes.Add(tnDir);
            }


            /**/
            /*
           //获得当前目录下的所有文件 
           FileInfo[] dirFiles;
           dirFiles=dirinfo.GetFiles();
           int iCount=7;

           foreach (FileInfo fi in dirFiles)
           {
          //得到每个文件的图标
          string str=fi.FullName;
          try
          {
            SetIcon(TreeImageList,str,false);
          }
          catch(Exception ex)
          { MessageBox.Show(ex.Message,"错误提示",0,MessageBoxIcon.Error);}
        
          TreeNode tnDir = new TreeNode(fi.Name, iCount, iCount);
          tn.Nodes.Add(tnDir);

          iCount  ;
           }
        */
        }
        //*************************************************************************************
        //在大图标、小图标、详细列表切换时调用
        protected virtual void ListViewAB(int iii)
        {
            if (iii == 1)
            {
                LisrimageList2.ImageSize = new Size(32, 32);
                listView1.LargeImageList = LisrimageList2;

                if (listView1.View == View.Details || listView1.View == View.SmallIcon)
                { listView1.View = View.LargeIcon; }
            }
            else if (iii == 2)
            {
                if (listView1.View == View.Details || listView1.View == View.LargeIcon)
                { listView1.View = View.SmallIcon; }
            }
            else
            {
                if (listView1.View == View.LargeIcon || listView1.View == View.SmallIcon)
                { listView1.View = View.Details; }
            }
        }
        //*************************************************************************************
        private void treeView1_BeforeExpand_1(object sender, System.Windows.Forms.TreeViewCancelEventArgs e)
        {
            //base.OnBeforeExpand(e);

            treeView1.BeginUpdate();

            foreach (TreeNode tn in e.Node.Nodes)
            { AddDirectories(tn); }

            treeView1.EndUpdate();
        }

        //*************************************************************************************

        protected virtual void InitList(TreeNode tn)
        {
            this.statusBarPanel1.Text = "正在刷新文件夹，请稍等..";
            this.Cursor = Cursors.WaitCursor;

            this.LisrimageList2.Images.Clear();
            this.LisrimageList.Images.Clear();
            listView1.SmallImageList = LisrimageList;
            Icon ic0 = myExtractIcon("%SystemRoot%\\system32\\shell32.dll", 3);
            LisrimageList.Images.Add(ic0);
            LisrimageList2.Images.Add(ic0);

            listView1.Clear();
            //设置列表框的表头
            listView1.Columns.Add("文件名", 160, HorizontalAlignment.Left);
            listView1.Columns.Add("文件大小", 120, HorizontalAlignment.Left);
            listView1.Columns.Add("创建时间", 120, HorizontalAlignment.Left);
            listView1.Columns.Add("访问时间", 200, HorizontalAlignment.Left);


            string strPath = tn.FullPath;
            strPath = strPath.Remove(0, 5);
            //获得当前目录下的所有文件 
            DirectoryInfo curDir = new DirectoryInfo(strPath);//创建目录对象。
            FileInfo[] dirFiles;
            try
            {
                dirFiles = curDir.GetFiles();
            }
            catch { return; }

            string[] arrSubItem = new string[4];
            //文件的创建时间和访问时间。
            int iCount = 0; int iconIndex = 1;//用1，而不用0是要让过0号图标。
            foreach (FileInfo fileInfo in dirFiles)
            {
                string strFileName = fileInfo.Name;

                //如果不是文件pagefile.sys
                if (!strFileName.Equals("pagefile.sys"))
                {
                    arrSubItem[0] = strFileName;
                    arrSubItem[1] = fileInfo.Length   " 字节";
                    arrSubItem[2] = fileInfo.CreationTime.ToString();
                    arrSubItem[3] = fileInfo.LastAccessTime.ToString();
                }
                else
                { arrSubItem[1] = "未知大小"; arrSubItem[2] = "未知日期"; arrSubItem[3] = "未知日期"; }


                //得到每个文件的图标
                string str = fileInfo.FullName;
                try
                {
                    SetIcon(LisrimageList, str, false);
                    SetIcon(LisrimageList2, str, true);
                }
                catch (Exception ex)
                { MessageBox.Show(ex.Message, "错误提示", 0, MessageBoxIcon.Error); }


                //插入列表项    
                ListViewItem LiItem = new ListViewItem(arrSubItem, iconIndex);
                listView1.Items.Insert(iCount, LiItem);

                iCount  ;
                iconIndex  ;
            }
            strFilePath = strPath;
            textBox1.Text = strPath;
            this.statusBarPanel1.Text = strPath;
            this.statusBarPanel2.Text = "文件数量: "   iCount.ToString()   "个";
            this.Cursor = Cursors.Arrow;



            //以下是向列表框中插入目录，不是文件。获得当前目录下的各个子目录。
            int iItem = 0;

            DirectoryInfo Dir = new DirectoryInfo(strPath);
            foreach (DirectoryInfo di in Dir.GetDirectories())
            {
                ListViewItem LiItem = new ListViewItem(di.Name, 0);
                listView1.Items.Insert(iItem, LiItem);
                iItem  ;
            }

        }
        //*************************************************************************************

        protected virtual void InitList2(string strName)
        {
            this.statusBarPanel1.Text = "正在刷新文件夹，请稍等..";
            this.Cursor = Cursors.WaitCursor;

            this.LisrimageList2.Images.Clear();
            this.LisrimageList.Images.Clear();
            listView1.SmallImageList = LisrimageList;
            Icon ic0 = myExtractIcon("%SystemRoot%\\system32\\shell32.dll", 3);
            LisrimageList.Images.Add(ic0);
            LisrimageList2.Images.Add(ic0);

            listView1.Clear();
            //设置列表框的表头
            listView1.Columns.Add("文件名", 160, HorizontalAlignment.Left);
            listView1.Columns.Add("文件大小", 120, HorizontalAlignment.Left);
            listView1.Columns.Add("创建时间", 120, HorizontalAlignment.Left);
            listView1.Columns.Add("访问时间", 200, HorizontalAlignment.Left);


            //获得当前目录下的所有文件 
            DirectoryInfo curDir = new DirectoryInfo(strName);//创建目录对象。
            FileInfo[] dirFiles;
            try
            {
                dirFiles = curDir.GetFiles();
            }
            catch { return; }

            string[] arrSubItem = new string[4];
            //文件的创建时间和访问时间。
            int iCount = 0; int iconIndex = 1;//用1，而不用0是要让过0号图标。
            foreach (FileInfo fileInfo in dirFiles)
            {
                string strFileName = fileInfo.Name;

                //如果不是文件pagefile.sys
                if (!strFileName.Equals("pagefile.sys"))
                {
                    arrSubItem[0] = strFileName;
                    arrSubItem[1] = fileInfo.Length   " 字节";
                    arrSubItem[2] = fileInfo.CreationTime.ToString();
                    arrSubItem[3] = fileInfo.LastAccessTime.ToString();
                }
                else
                { arrSubItem[1] = "未知大小"; arrSubItem[2] = "未知日期"; arrSubItem[3] = "未知日期"; }


                //得到每个文件的图标
                string str = fileInfo.FullName;
                try
                {
                    SetIcon(LisrimageList, str, false);
                    SetIcon(LisrimageList2, str, true);
                }
                catch (Exception ex)
                { MessageBox.Show(ex.Message, "错误提示", 0, MessageBoxIcon.Error); }


                //插入列表项    
                ListViewItem LiItem = new ListViewItem(arrSubItem, iconIndex);
                listView1.Items.Insert(iCount, LiItem);

                iCount  ;
                iconIndex  ;//必须加在listView1.Items.Insert(iCount,LiItem);
            }
            strFilePath = strName;//把路径赋值于全局变量strFilePath

            textBox1.Text = strName;
            this.statusBarPanel2.Text = "文件数量: "   iCount.ToString()   "个";
            this.Cursor = Cursors.Arrow;



            //以下是向列表框中插入目录，不是文件。获得当前目录下的各个子目录。
            int iItem = 0;//调用listView1.Items.Insert(iItem,LiItem);时用。不能使用iconIndex。

            DirectoryInfo Dir = new DirectoryInfo(strName);//创建目录对象。
            foreach (DirectoryInfo di in Dir.GetDirectories())
            {
                ListViewItem LiItem = new ListViewItem(di.Name, 0);
                listView1.Items.Insert(iItem, LiItem);
                iItem  ;
            }

        }
        //*************************************************************************************

        private void treeView1_AfterSelect_1(object sender, System.Windows.Forms.TreeViewEventArgs e)
        {
            if (e.Node.Text == "我的电脑")
            { return; }

            InitList(e.Node);
        }
        //*************************************************************************************

        private void button1_Click(object sender, System.EventArgs e)
        {
            this.panel1.Hide();
        }
        //*************************************************************************************

        private void listView1_ItemActivate(object sender, System.EventArgs e)
        {
            string str = Path.Combine(strFilePath, listView1.FocusedItem.Text);
            try
            {
                if (listView1.FocusedItem.SubItems.Count > 1)
                { System.Diagnostics.Process.Start(str); }
                else
                { InitList2(str); }
            }
            catch { return; }
        }
        //*************************************************************************************
        private void menuItem3_Click(object sender, System.EventArgs e)
        {
            this.panel1.Visible = !panel1.Visible;
        }
        //*************************************************************************************
        private void menuItem5_Click(object sender, System.EventArgs e)
        {
            ListViewAB(1);
        }
        //*************************************************************************************
        private void menuItem6_Click(object sender, System.EventArgs e)
        {
            ListViewAB(2);
        }
        //*************************************************************************************
        private void menuItem7_Click(object sender, System.EventArgs e)
        {
            ListViewAB(3);
        }
        //*************************************************************************************


    }
}