C# 利用FTP自动下载xml文件后利用 FileSystemWatcher 监控目录下文件变化并自动更新数据库

using FtpLib;using System;using System.Collections.Generic;using System.ComponentModel;using System.Data;using System.Diagnostics;using System.IO;using System.Linq;using System.ServiceProcess;using System.Text;using System.Threading;using System.Threading.Tasks;namespace WindowsService1{public partial class Service1 : ServiceBase{private int TimeoutMillis = 2000; //定时器触发间隔private int _countFileChangeEvent = 0, _countTimerEvent = 0;System.IO.FileSystemWatcher fsw = new System.IO.FileSystemWatcher();System.Threading.Timer m_timer = null;System.Threading.Timer m_timerDownLoad = null;List<String> files = new List<string>(); //记录待处理文件的队列private Thread ThreadHello;private Thread ThreadDownLoad;private List<ChannelTvListInfo> lstNewTvInfo; public Service1(){InitializeComponent();}//http://blog.csdn.net/hwt0101/article/details/8514291//http://www.cnblogs.com/mywebname/articles/1244745.html//http://www.cnblogs.com/jzywh/archive/2008/07/23/filesystemwatcher.html/// <summary>/// 服务启动的操作/// </summary>/// <param name="args"></param>protected override void OnStart(string[] args){try{ThreadDownLoad = new Thread(new ThreadStart(ThreadTime));ThreadDownLoad.Start();ThreadHello = new Thread(new ThreadStart(Hello));ThreadHello.Start();WriteInLog("服务线程任务开始", false);System.Diagnostics.Trace.Write("线程任务开始");}catch (Exception ex){System.Diagnostics.Trace.Write(ex.Message);throw ex;}}public List<ChannelTvListInfo> listFTPFiles(string FTPAddress, string username, string password){List<ChannelTvListInfo> listinfo = new List<ChannelTvListInfo>();using (FtpConnection ftp = new FtpConnection(FTPAddress, username, password)){ftp.Open();ftp.Login();foreach (var file in ftp.GetFiles("/")){listinfo.Add(new ChannelTvListInfo { TVName = file.Name,LastWriteTime = Convert.ToDateTime(file.LastWriteTime).ToString("yyyy/MM/dd HH:mm") });}ftp.Dispose();ftp.Close();}return listinfo;}/// <summary>/// 服务停止的操作/// </summary>protected override void OnStop(){try{ThreadHello.Abort();WriteInLog("服务线程停止", false);System.Diagnostics.Trace.Write("线程停止");}catch (Exception ex){System.Diagnostics.Trace.Write(ex.Message);}}private void Hello(){try{fsw.Filter = "*.xml"; //设置监控文件的类型fsw.Path = @"D:\ChannelTvXML";   //设置监控的文件目录fsw.IncludeSubdirectories = true;   //设置监控C盘目录下的所有子目录fsw.InternalBufferSize = 100000;fsw.NotifyFilter = NotifyFilters.CreationTime | NotifyFilters.Size | NotifyFilters.LastWrite | NotifyFilters.FileName | NotifyFilters.DirectoryName; ;   //设置文件的文件名、目录名及文件的大小改动会触发Changed事件fsw.Changed += new FileSystemEventHandler(this.fsw_Changed);fsw.Error += new ErrorEventHandler(this.fsw_Error);fsw.EnableRaisingEvents = true;// Create the timer that will be used to deliver events. Set as disabledif (m_timer == null){//设置定时器的回调函数。此时定时器未启动m_timer = new System.Threading.Timer(new TimerCallback(OnWatchedFileChange), null, Timeout.Infinite, Timeout.Infinite);} }catch (Exception ex){System.Diagnostics.Trace.Write(ex.Message);throw ex;}Thread.Sleep(5000);}private void ThreadTime(){List<ChannelTvListInfo> lstNewTvInfo = listFTPFiles("xxx.xx.140.170", "", "");WriteInLog(lstNewTvInfo.Count + "获取列表信息成功", false);// Create the timer that will be used to deliver events. Set as disabledif (m_timerDownLoad == null){//设置定时器的回调函数。此时定时器未启动m_timerDownLoad = new System.Threading.Timer(new TimerCallback(DownLoadTvListInfo), null, Timeout.Infinite, Timeout.Infinite);}Thread.Sleep(5000);}private void DownLoadTvListInfo(object state){List<ChannelTvListInfo> lstOldTvInfo = new List<ChannelTvListInfo>();DirectoryInfo TheFolder = new DirectoryInfo(@"D:\ChannelTvXML");foreach (FileInfo NextFile in TheFolder.GetFileSystemInfos()){lstOldTvInfo.Add(new ChannelTvListInfo { TVName = NextFile.Name, LastWriteTime = NextFile.LastWriteTime.ToString("yyyy/MM/dd HH:mm") });}var result = lstNewTvInfo.Except(lstOldTvInfo, new ProductComparer()).ToList();if (result.Count > 0){foreach (var item in result){new FtpHelper().DownloadFtpFile("", "", "xx.xx.140.170", @"D:\ChannelTvXML", item.TVName);WriteInLog(item.TVName + "下载成功", false);}}}    private void fsw_Changed(object sender, FileSystemEventArgs e){Mutex mutex = new Mutex(false, "Wait");mutex.WaitOne();if (!files.Contains(e.Name)){files.Add(e.Name);}mutex.ReleaseMutex();//重新设置定时器的触发间隔，并且仅仅触发一次m_timer.Change(TimeoutMillis, Timeout.Infinite);}/// <summary>/// 定时器事件触发代码：进行文件的实际处理/// </summary>/// <param name="state"></param>private void OnWatchedFileChange(object state){_countTimerEvent++;WriteInLog(string.Format("TimerEvent {0}", _countTimerEvent.ToString("#00")), false);List<String> backup = new List<string>();Mutex mutex = new Mutex(false, "Wait");mutex.WaitOne();backup.AddRange(files);files.Clear();mutex.ReleaseMutex();foreach (string file in backup){_countFileChangeEvent++;WriteInLog(string.Format("FileEvent {0} :{1}文件已于{2}进行{3}", _countFileChangeEvent.ToString("#00"), file, DateTime.Now, "changed"), false);}}private void fsw_Error(object sender, ErrorEventArgs e){WriteInLog(e.GetException().Message, false);}/// <summary>/// 写入文件操作/// </summary>/// <param name="msg">写入内容</param>/// <param name="IsAutoDelete">是否删除</param>private void WriteInLog(string msg, bool IsAutoDelete){try{string logFileName = @"D:\DownTvList_" + DateTime.Now.ToString("yyyyMMdd") + "_log.txt" + ""; // 文件路径FileInfo fileinfo = new FileInfo(logFileName);if (IsAutoDelete){if (fileinfo.Exists && fileinfo.Length >= 1024){fileinfo.Delete();}}using (FileStream fs = fileinfo.OpenWrite()){StreamWriter sw = new StreamWriter(fs);sw.BaseStream.Seek(0, SeekOrigin.End);sw.Write("INFO-" + DateTime.Now.ToString() + "--日志内容为:" + msg + "\r\n");//sw.WriteLine("=====================================");sw.Flush();sw.Close();}}catch (Exception ex){ex.ToString();}}}}

FtpHelper.cs　类代码using System;using System.Collections.Generic;using System.IO;using System.Linq;using System.Net;using System.Text;using System.Threading.Tasks;namespace WindowsService1{public class FtpHelper{private FtpWebRequest ftpRequest = null;private FtpWebResponse ftpResponse = null;private Stream ftpStream = null;/// <summary>///  Get Filelist  Name/// </summary>/// <param name="userId">ftp userid</param>/// <param name="pwd">ftp password</param>/// <param name="ftpIP">ftp ip</param>/// <returns></returns>public string[] GetFtpFileName(string userId, string pwd, string ftpIP, string filename){string[] downloadFiles;StringBuilder result = new StringBuilder();try{ftpRequest = (FtpWebRequest)FtpWebRequest.Create(ftpIP + "/" + filename);ftpRequest.Credentials = new NetworkCredential(userId, pwd);ftpRequest.UseBinary = true;ftpRequest.UsePassive = true;ftpRequest.KeepAlive = true;ftpRequest.Method = WebRequestMethods.Ftp.ListDirectory;ftpResponse = (FtpWebResponse)ftpRequest.GetResponse();ftpStream = ftpResponse.GetResponseStream();StreamReader ftpReader = new StreamReader(ftpStream);string line = ftpReader.ReadLine();while (line != null){result.Append(line);result.Append("\n");line = ftpReader.ReadLine();}result.Remove(result.ToString().LastIndexOf('\n'), 1);ftpReader.Close();ftpStream.Close();ftpResponse.Close();ftpRequest = null;return result.ToString().Split('\n');}catch (Exception ex){downloadFiles = null;return downloadFiles;}}public string[] GetFtpFileName(string userId, string pwd, string ftpIP){string[] downloadFiles;StringBuilder result = new StringBuilder();try{ftpRequest = (FtpWebRequest)FtpWebRequest.Create(ftpIP + "/");ftpRequest.Credentials = new NetworkCredential(userId, pwd);ftpRequest.UseBinary = true;ftpRequest.UsePassive = true;ftpRequest.KeepAlive = true;ftpRequest.Method = WebRequestMethods.Ftp.ListDirectory;ftpResponse = (FtpWebResponse)ftpRequest.GetResponse();ftpStream = ftpResponse.GetResponseStream();StreamReader ftpReader = new StreamReader(ftpStream);string line = ftpReader.ReadLine();while (line != null){result.Append(line);result.Append("\n");line = ftpReader.ReadLine();}result.Remove(result.ToString().LastIndexOf('\n'), 1); ftpReader.Close();ftpStream.Close();ftpResponse.Close();ftpRequest = null; return result.ToString().Split('\n');  }catch (Exception ex){downloadFiles = null;return downloadFiles;}}/// <summary>///从ftp服务器上下载文件的功能/// </summary>/// <param name="userId"></param>/// <param name="pwd"></param>/// <param name="ftpUrl">ftp地址</param>/// <param name="filePath"></param>/// <param name="fileName"></param>public void DownloadFtpFile(string userId, string pwd, string ftpUrl, string filePath, string fileName){FtpWebRequest reqFTP = null;FtpWebResponse response = null;try{String onlyFileName = Path.GetFileName(fileName);string downFileName = filePath + "\\" + onlyFileName;string url = "ftp://" + ftpUrl + "/" + fileName;if (File.Exists(downFileName)){DeleteDir(downFileName);}FileStream outputStream = new FileStream(downFileName, FileMode.Create);reqFTP = (FtpWebRequest)FtpWebRequest.Create(new Uri(url));reqFTP.Credentials = new NetworkCredential(userId, pwd);reqFTP.UseBinary = true;reqFTP.UsePassive = true;reqFTP.KeepAlive = true;reqFTP.Method = WebRequestMethods.Ftp.DownloadFile;response = (FtpWebResponse)reqFTP.GetResponse(); Stream ftpStream = response.GetResponseStream();long cl = response.ContentLength;int bufferSize = 2048;int readCount;byte[] buffer = new byte[bufferSize];readCount = ftpStream.Read(buffer, 0, bufferSize);while (readCount > 0){outputStream.Write(buffer, 0, readCount);readCount = ftpStream.Read(buffer, 0, bufferSize);}ftpStream.Close();outputStream.Close();response.Close();}catch (Exception ex){throw ex;}}          public DateTime GetDateTimestamp(string ftpUrl, string remoteFile, string username, string password)        {            string url = "ftp://" + ftpUrl + "/" + remoteFile;            FtpWebRequest reqFTP = (FtpWebRequest)FtpWebRequest.Create(new Uri(url));            reqFTP.Credentials = new NetworkCredential(username, password);            reqFTP.UseBinary = true;            reqFTP.UsePassive = true;            reqFTP.KeepAlive = true;            reqFTP.Method = WebRequestMethods.Ftp.GetDateTimestamp;            FtpWebResponse response = (FtpWebResponse)reqFTP.GetResponse();            return response.LastModified;        }/// 基姆拉尔森计算公式计算日期/// </summary>/// <param name="y">年</param>/// <param name="m">月</param>/// <param name="d">日</param>/// <returns>星期几</returns>public static string CaculateWeekDay(int y, int m, int d){if (m == 1 || m == 2){m += 12;y--;         //把一月和二月看成是上一年的十三月和十四月，例：如果是2004-1-10则换算成：2003-13-10来代入公式计算。}int week = (d + 2 * m + 3 * (m + 1) / 5 + y + y / 4 - y / 100 + y / 400) % 7;string weekstr = "";switch (week){case 0: weekstr = "星期一"; break;case 1: weekstr = "星期二"; break;case 2: weekstr = "星期三"; break;case 3: weekstr = "星期四"; break;case 4: weekstr = "星期五"; break;case 5: weekstr = "星期六"; break;case 6: weekstr = "星期日"; break;}return weekstr;}/// <summary>/// 返回不带后缀的文件名/// </summary>/// <param name="fileName"></param>/// <returns></returns>public static string GetFirstFileName(string fileName){return Path.GetFileNameWithoutExtension(fileName);}#region 删除指定目录以及该目录下所有文件/// </summary><param name="dir">欲删除文件或者目录的路径</param>public static void DeleteDir(string dir){CleanFiles(dir);//第一次删除文件CleanFiles(dir);//第二次删除目录}/// <summary>/// 删除文件和目录/// </summary>///使用方法Directory.Delete( path, true)private static void CleanFiles(string dir){if (!Directory.Exists(dir)){File.Delete(dir); return;}else{string[] dirs = Directory.GetDirectories(dir);string[] files = Directory.GetFiles(dir);if (0 != dirs.Length){foreach (string subDir in dirs){if (null == Directory.GetFiles(subDir)){ Directory.Delete(subDir); return; }else CleanFiles(subDir);}}if (0 != files.Length){foreach (string file in files){ File.Delete(file); }}else Directory.Delete(dir);}}#endregion}public class ChannelListInfo{//   public string ChannelID { get; set; }public string WeekDate { get; set; }public string ChannelTV { get; set; }public string ChannelName { get; set; }public string ChannelType { get; set; }public string ChannelSummary { get; set; }//   public string ChannelImg { get; set; }public DateTime ChannelStartDate { get; set; }public DateTime ChannelEndDate { get; set; }//   public DateTime? AddTime { get; set; }public DateTime? ChannelPlayDate { get; set; }}public class ChannelTvListInfo{public string TVName { get; set; }public string LastWriteTime { get; set; }}// Custom comparer for the Product classpublic class ProductComparer : IEqualityComparer<ChannelTvListInfo>{// Products are equal if their names and product numbers are equal.public bool Equals(ChannelTvListInfo x, ChannelTvListInfo y){//Check whether the compared objects reference the same data.if (Object.ReferenceEquals(x, y)) return true;//Check whether any of the compared objects is null.if (Object.ReferenceEquals(x, null) || Object.ReferenceEquals(y, null))return false;//Check whether the products' properties are equal.return x.TVName == y.TVName && x.LastWriteTime == y.LastWriteTime;}// If Equals() returns true for a pair of objects // then GetHashCode() must return the same value for these objects.public int GetHashCode(ChannelTvListInfo product){//Check whether the object is nullif (Object.ReferenceEquals(product, null)) return 0;//Get hash code for the Name field if it is not null.int hashProductName = product.TVName == null ? 0 : product.TVName.GetHashCode();//Get hash code for the Code field.int hashProductCode = product.LastWriteTime.GetHashCode();//Calculate the hash code for the product.return hashProductName ^ hashProductCode;}}}