使用控制线程监视目录文件变化

using System;
using System.IO;
using System.Xml;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Text;
using System.Windows.Forms;
using System.Threading;
using System.Diagnostics;
using SynchroManager;
using SynchroManager.baseclass;



namespace SynchroManager
{
    public partial class frmChange : Form
    {
        public frmChange()
        {
            InitializeComponent();
         }
        delegate void SetTextCallback(string text);

        private string s;
        private string _dowlist;
        private string _LookFolder;
        private Thread demoThread = null;

        private void btnRun_Click(object sender, EventArgs e)
        {
            FileSystemWatcher watcher = new FileSystemWatcher();
            if (txtFilter.Text.Length < 2)
            {
                MessageBox.Show("请选择监视目录");
                return;
            }

            watcher.Path = txtFilter.Text;
            watcher.NotifyFilter = NotifyFilters.LastAccess | NotifyFilters.LastWrite | NotifyFilters.FileName | NotifyFilters.DirectoryName;

            watcher.Filter = "";


            watcher.Changed += new FileSystemEventHandler(OnChanged);
            watcher.Created += new FileSystemEventHandler(OnCreated);
            watcher.Deleted += new FileSystemEventHandler(OnDeleted);
            watcher.Renamed += new RenamedEventHandler(OnRenamed);
            watcher.EnableRaisingEvents = true;
            watcher.EndInit();

        }

        private void OnChanged(object source, FileSystemEventArgs e)
        {
            s = e.FullPath + " " + e.ChangeType;
            this.demoThread = new Thread(new ThreadStart(this.ThreadProcSafe));
            this.demoThread.Start();
            //StreamWriter  strW = File.CreateText("C:Inetpub tprootdownlist.txt");
            //strW.WriteLine(s);
            //strW.Close();


        }
        private void OnCreated(object source, FileSystemEventArgs e)
        {
            s = e.FullPath + " " + e.ChangeType;
            this.demoThread = new Thread(new ThreadStart(this.ThreadProcSafe));
            this.demoThread.Start();
            //StreamWriter strW = File.CreateText("C:Inetpub tprootdownlist.txt");
            //strW.WriteLine(s);
            //strW.Close();

        }
        private void OnDeleted(object source, FileSystemEventArgs e)
        {
            s = e.FullPath + " " + e.ChangeType;
            this.demoThread = new Thread(new ThreadStart(this.ThreadProcSafe));
            this.demoThread.Start();
            //StreamWriter strW = File.CreateText("C:Inetpub tprootdownlist.txt");
            //strW.WriteLine(s);
            //strW.Close();

        }

        private void OnRenamed(object source, FileSystemEventArgs e)
        {
            s = e.FullPath + " " + e.ChangeType;
            this.demoThread = new Thread(new ThreadStart(this.ThreadProcSafe));
            this.demoThread.Start();

            //StreamWriter strW = File.CreateText("C:Inetpub tprootdownlist.txt");
            //while((st=strR.ReadLine())!=null;
            //strW.WriteLine(s);
            //strW.Close();

        }

        private void SetText(string text)
        {
            if (this.lblist.InvokeRequired)
            {
                SetTextCallback d = new SetTextCallback(SetText);
                this.Invoke(d, new object[] { text });
            }
            else
            {
                this.lblist.Items.Add(text);
            }
        }
        private void ThreadProcSafe()
        {
            this.SetText(s);
        }

      }
}
}