高分求教C#遍历指定目录下所有文件（包括子目录中的文件）较好的办法?

[情傷]

最近要做一个Winform，实现指定文件夹目录后，扫描该目录下所有的文件，包括该文件夹下的子目录及孙目录中的文件
例：扫描D盘中所有文件夹里面的所有文件，有没有什么较为高效的办法，要求能防止程序卡死！不要一点击程序就出现未响应状态！

//定义代理
        delegate void Mydelegate(DirectoryInfo dir, DateTime dtStart, DateTime dtEnd);
        delegate void PrintDelegate(FileInfo file);

        private void btnSelectDirectory_Click(object sender, EventArgs e)
        {
            FolderBrowserDialog path = new FolderBrowserDialog();
            path.ShowDialog();
            if (!"".Equals(path.SelectedPath))
            {
                tboSelectPath.Text = path.SelectedPath;
            }
        }

        private void btnStartScan_Click(object sender, EventArgs e)
        {
            DateTime dtStart = dateTimePicker1.Value.Date;
            DateTime dtEnd = new DateTime(dateTimePicker2.Value.Year, dateTimePicker2.Value.Month, dateTimePicker2.Value.Day + 1, 0, 0, 0);
            DirectoryInfo di = new DirectoryInfo("F:\\bea");
            Scan(di, dtStart, dtEnd);
        }

        private void print(FileInfo file)
        {

            if (tboFiles.InvokeRequired)
            {
                PrintDelegate Md = new PrintDelegate(print);
                tboFiles.Invoke(Md, file);   //
            }
            else
                tboFiles.Text += file.FullName;
        }

        private void Scan(DirectoryInfo dir, DateTime dtStart, DateTime dtEnd)
        {
            if (dir.Exists)
            {
                FileInfo[] files = dir.GetFiles();
                if (files.Length > 0)
                {

                    foreach (FileInfo item in files)
                    {
                        if (item.LastWriteTime > dtStart && item.LastWriteTime < dtEnd)
                        {
                            PrintDelegate Md = new PrintDelegate(print);
                            //实例一个回调代理
                            AsyncCallback callback = new AsyncCallback(callbackMethod);
                            //开始执行异步方法
                            Md.BeginInvoke(item, callbackMethod, Md);
                        }
                    }
                }
                DirectoryInfo[] dirs = dir.GetDirectories();
                if (dirs.Length > 0)
                {
                    foreach (DirectoryInfo item in dirs)
                    {
                        Mydelegate Md = new Mydelegate(Scan);
                        //实例一个回调代理
                        AsyncCallback callback = new AsyncCallback(callbackMethod);
                        //开始执行异步方法
                        Md.BeginInvoke(item, dtStart, dtEnd, callbackMethod, Md);
                    }
                }
            }
        }//回调方法
        static void callbackMethod(IAsyncResult Ias)
        {
        }

现代码如上，麻烦高手指教！

[情傷]

用多线程弄的如下，

private void btnSelectDirectory_Click(object sender, EventArgs e)
        {
            FolderBrowserDialog path = new FolderBrowserDialog();
            path.ShowDialog();
            if (!"".Equals(path.SelectedPath))
            {
                tboSelectPath.Text = path.SelectedPath;
            }
        }

        private void Form1_Load(object sender, EventArgs e)
        {
            dateTimePicker2.Value = DateTime.Now;
        }

        private void btnStartScan_Click(object sender, EventArgs e)
        {

            DateTime dtStart = dateTimePicker1.Value.Date;
            DateTime dtEnd = new DateTime(dateTimePicker2.Value.Year, dateTimePicker2.Value.Month, dateTimePicker2.Value.Day + 1, 0, 0, 0);
            DirectoryInfo d = new DirectoryInfo(tboSelectPath.Text.Trim());
            //Thread t = new Thread(new ThreadStart(new ScanFile(d, dtStart, dtEnd).Scans));
            //t.Start();
            Scans(d, dtStart, dtEnd);
        }

        DirectoryInfo[] dirs; FileInfo[] files;
        static int filesCount = 0;
        private void Scans(DirectoryInfo dir, DateTime dtStart, DateTime dtEnd)
        {
            files = dir.GetFiles();
            dirs = dir.GetDirectories();
            if (files.Length > 0)
            {
                foreach (FileInfo item in files)
                {
                    filesCount++;
                    if (dtStart <= item.LastWriteTime && item.LastWriteTime <= dtEnd)
                    {
                        Console.WriteLine(item.FullName);
                        if (tboFiles.InvokeRequired)
                        {
                            ScanDelegate s = new ScanDelegate(Scans);
                            s.Invoke(dir, dtStart, dtEnd);
                        }
                        else
                            tboFiles.Text += "修改时间:" + item.LastWriteTime.ToString() + "    " + item.FullName + "\r\n";
                    }
                }
            }

            if (dirs.Length > 0)
            {
                foreach (DirectoryInfo item in dirs)
                {
                    //

                    Thread t = new Thread(new ThreadStart(new ScanFile(item, dtStart, dtEnd).Scans));
                    t.Start();
                }
            }
        }

        public delegate void Scan(DirectoryInfo[] folder, DateTime dtStart, DateTime dtEnd);
        public delegate void ScanDelegate(DirectoryInfo dir, DateTime dtStart, DateTime dtEnd);

        private void ScanFiles(DirectoryInfo[] folder, DateTime dtStart, DateTime dtEnd)
        {
            foreach (DirectoryInfo d in folder)
            {
                if (d.Exists)
                {

                    FileInfo[] files = d.GetFiles();
                    foreach (FileInfo file in files)
                    {
                        if (dtStart <= file.LastWriteTime && file.LastWriteTime <= dtEnd)
                        {
                            if (tboFiles.InvokeRequired)
                            {
                                Scan setpos = new Scan(ScanFiles);
                                tboFiles.Invoke(setpos, folder, dtStart, dtEnd);   //重新调用SetListBox函数
                                //setpos.BeginInvoke(ds, dtStart, dtEnd, null, setpos);
                            }
                            else
                                tboFiles.Text += (tboFiles.Text.Trim().Length == 0 ? "" : "\r\n") + "修改时间:" + file.LastWriteTime.ToString() + "    " + file.DirectoryName + "\\" + file.Name;
                        }
                    }
                    DirectoryInfo[] ds = d.GetDirectories();
                    if (ds.Count() > 0)
                    {
                        //ScanFiles(ds, dtStart, dtEnd);

                        //Scan setpos = new Scan(ScanFiles);
                        //setpos.BeginInvoke(ds, dtStart, dtEnd, null, setpos);
                        Thread fThread = new Thread(new ThreadStart(new ScanFile(ds, dtStart, dtEnd).Scan));//开辟一个新的线程 

                        fThread.Start();
                    }
                }
            }
        }

        public static void ScanFile(DirectoryInfo[] folder, DateTime dtStart, DateTime dtEnd)
        {
            ScanFile(folder, dtStart, dtEnd);
        }
        public static void ScanFile(DirectoryInfo dir, DateTime dtStart, DateTime dtEnd)
        {
            new Form1().Scans(dir, dtStart, dtEnd);
        }
    }

    public class ScanFile
    {
        private DirectoryInfo[] dis;
        private DirectoryInfo dir;
        //private FileInfo[] files;
        private DateTime dtStart;
        private DateTime dtEnd;
        //private StringBuilder sbFiles;
        public ScanFile(DirectoryInfo[] dis, DateTime dtStart, DateTime dtEnd)
        {
            this.dis = dis;
            this.dtStart = dtStart;
            this.dtEnd = dtEnd;
        }
        public ScanFile(DirectoryInfo dir, DateTime dtStart, DateTime dtEnd)
        {
            this.dir = dir;
            this.dtStart = dtStart;
            this.dtEnd = dtEnd;
        }
        public void Scan()
        {
            Form1.ScanFile(this.dis, this.dtStart, this.dtEnd);
        }
        public void Scans()
        {
            Form1.ScanFile(dir, dtStart, dtEnd);
        }

    }

[bdmh]

放到线程中，用委托和UI交互

[铛铛]

其实你并不用一下子完全扫描出来。因为看的人不会一下子展开全部节点
你可以在展开某个节点的时候扫描该节点下的内容

[情傷]

[Quote=引用 3 楼 的回复:]

其实你并不用一下子完全扫描出来。因为看的人不会一下子展开全部节点
你可以在展开某个节点的时候扫描该节点下的内容
[/Quote]
3楼的回复是可以考虑，做成树型菜单，一边是结构，一边显示点击的目录中的修改文件，这想法可以！

[情傷]

[code=#]
private void btnStartScan_Click(object sender, EventArgs e)
{

DateTime dtStart = dateTimePicker1.Value.Date;
DateTime dtEnd = new DateTime(dateTimePicker2.Value.Year, dateTimePicker2.Value.Month, dateTimePicker2.Value.Day + 1, 0, 0, 0);
DirectoryInfo d = new DirectoryInfo(tboSelectPath.Text.Trim());
//Thread t = new Thread(new ThreadStart(new ScanFile(d, dtStart, dtEnd).Scans));
//t.Start();
Scans(d, dtStart, dtEnd);
}
[/code]
将上面这段注释的部分取消注释，下面一行注释掉之后，扫描出来的文件名无法添加在textbox中，这是为何?