C# FTP操作类分享_C#

本文实例为大家分享了C# FTP操作类的具体代码，可进行FTP的上传，下载等其他功能，支持断点续传，供大家参考，具体内容如下
FTPHelper
				?

									using System;

									using System.Collections.Generic;

									using System.IO;

									using System.Linq;

									using System.Net;

									using System.Text;

									using System.Threading.Tasks;

									namespace ManagementProject

									{

									 public class FTPHelper

									 {

									 string ftpRemotePath;

									 #region 变量属性

									 /// <summary>

									 /// Ftp服务器ip

									 /// </summary>

									 public static string FtpServerIP = "";

									 /// <summary>

									 /// Ftp 指定用户名

									 /// </summary>

									 public static string FtpUserID = "";

									 /// <summary>

									 /// Ftp 指定用户密码

									 /// </summary>

									 public static string FtpPassword = "";

									 public static string ftpURI = "ftp://" + FtpServerIP + "/";

									 #endregion

									 #region 从FTP服务器下载文件，指定本地路径和本地文件名

									 /// <summary>

									 /// 从FTP服务器下载文件，指定本地路径和本地文件名

									 /// </summary>

									 /// <param name="remoteFileName">远程文件名</param>

									 /// <param name="localFileName">保存本地的文件名（包含路径）</param>

									 /// <param name="ifCredential">是否启用身份验证（false：表示允许用户匿名下载）</param>

									 /// <param name="updateProgress">报告进度的处理(第一个参数：总大小，第二个参数：当前进度)</param>

									 /// <returns>是否下载成功</returns>

									 public static bool FtpDownload(string remoteFileName, string localFileName, bool ifCredential, Action<int, int> updateProgress = null)

									 {

									  FtpWebRequest reqFTP, ftpsize;

									  Stream ftpStream = null;

									  FtpWebResponse response = null;

									  FileStream outputStream = null;

									  try

									  {

									  outputStream = new FileStream(localFileName, FileMode.Create);

									  if (FtpServerIP == null || FtpServerIP.Trim().Length == 0)

									  {

									   throw new Exception("ftp下载目标服务器地址未设置！");

									  }

									  Uri uri = new Uri("ftp://" + FtpServerIP + "/" + remoteFileName);

									  ftpsize = (FtpWebRequest)FtpWebRequest.Create(uri);

									  ftpsize.UseBinary = true;

									  reqFTP = (FtpWebRequest)FtpWebRequest.Create(uri);

									  reqFTP.UseBinary = true;

									  reqFTP.KeepAlive = false;

									  if (ifCredential)//使用用户身份认证

									  {

									   ftpsize.Credentials = new NetworkCredential(FtpUserID, FtpPassword);

									   reqFTP.Credentials = new NetworkCredential(FtpUserID, FtpPassword);

									  }

									  ftpsize.Method = WebRequestMethods.Ftp.GetFileSize;

									  FtpWebResponse re = (FtpWebResponse)ftpsize.GetResponse();

									  long totalBytes = re.ContentLength;

									  re.Close();

									  reqFTP.Method = WebRequestMethods.Ftp.DownloadFile;

									  response = (FtpWebResponse)reqFTP.GetResponse();

									  ftpStream = response.GetResponseStream();

									  //更新进度 

									  if (updateProgress != null)

									  {

									   updateProgress((int)totalBytes, 0);//更新进度条 

									  }

									  long totalDownloadedByte = 0;

									  int bufferSize = 2048;

									  int readCount;

									  byte[] buffer = new byte[bufferSize];

									  readCount = ftpStream.Read(buffer, 0, bufferSize);

									  while (readCount > 0)

									  {

									   totalDownloadedByte = readCount + totalDownloadedByte;

									   outputStream.Write(buffer, 0, readCount);

									   //更新进度 

									   if (updateProgress != null)

									   {

									   updateProgress((int)totalBytes, (int)totalDownloadedByte);//更新进度条 

									   }

									   readCount = ftpStream.Read(buffer, 0, bufferSize);

									  }

									  ftpStream.Close();

									  outputStream.Close();

									  response.Close();

									  return true;

									  }

									  catch (Exception ex)

									  {

									  return false;

									  throw;

									  }

									  finally

									  {

									  if (ftpStream != null)

									  {

									   ftpStream.Close();

									  }

									  if (outputStream != null)

									  {

									   outputStream.Close();

									  }

									  if (response != null)

									  {

									   response.Close();

									  }

									  }

									 }

									 /// <summary>

									 /// 从FTP服务器下载文件，指定本地路径和本地文件名（支持断点下载）

									 /// </summary>

									 /// <param name="remoteFileName">远程文件名</param>

									 /// <param name="localFileName">保存本地的文件名（包含路径）</param>

									 /// <param name="ifCredential">是否启用身份验证（false：表示允许用户匿名下载）</param>

									 /// <param name="size">已下载文件流大小</param>

									 /// <param name="updateProgress">报告进度的处理(第一个参数：总大小，第二个参数：当前进度)</param>

									 /// <returns>是否下载成功</returns>

									 public static bool FtpBrokenDownload(string remoteFileName, string localFileName, bool ifCredential, long size, Action<int, int> updateProgress = null)

									 {

									  FtpWebRequest reqFTP, ftpsize;

									  Stream ftpStream = null;

									  FtpWebResponse response = null;

									  FileStream outputStream = null;

									  try

									  {

									  outputStream = new FileStream(localFileName, FileMode.Append);

									  if (FtpServerIP == null || FtpServerIP.Trim().Length == 0)

									  {

									   throw new Exception("ftp下载目标服务器地址未设置！");

									  }

									  Uri uri = new Uri("ftp://" + FtpServerIP + "/" + remoteFileName);

									  ftpsize = (FtpWebRequest)FtpWebRequest.Create(uri);

									  ftpsize.UseBinary = true;

									  ftpsize.ContentOffset = size;

									  reqFTP = (FtpWebRequest)FtpWebRequest.Create(uri);

									  reqFTP.UseBinary = true;

									  reqFTP.KeepAlive = false;

									  reqFTP.ContentOffset = size;

									  if (ifCredential)//使用用户身份认证

									  {

									   ftpsize.Credentials = new NetworkCredential(FtpUserID, FtpPassword);

									   reqFTP.Credentials = new NetworkCredential(FtpUserID, FtpPassword);

									  }

									  ftpsize.Method = WebRequestMethods.Ftp.GetFileSize;

									  FtpWebResponse re = (FtpWebResponse)ftpsize.GetResponse();

									  long totalBytes = re.ContentLength;

									  re.Close();

									  reqFTP.Method = WebRequestMethods.Ftp.DownloadFile;

									  response = (FtpWebResponse)reqFTP.GetResponse();

									  ftpStream = response.GetResponseStream();

									  //更新进度 

									  if (updateProgress != null)

									  {

									   updateProgress((int)totalBytes, 0);//更新进度条 

									  }

									  long totalDownloadedByte = 0;

									  int bufferSize = 2048;

									  int readCount;

									  byte[] buffer = new byte[bufferSize];

									  readCount = ftpStream.Read(buffer, 0, bufferSize);

									  while (readCount > 0)

									  {

									   totalDownloadedByte = readCount + totalDownloadedByte;

									   outputStream.Write(buffer, 0, readCount);

									   //更新进度 

									   if (updateProgress != null)

									   {

									   updateProgress((int)totalBytes, (int)totalDownloadedByte);//更新进度条 

									   }

									   readCount = ftpStream.Read(buffer, 0, bufferSize);

									  }

									  ftpStream.Close();

									  outputStream.Close();

									  response.Close();

									  return true;

									  }

									  catch (Exception ex)

									  {

									  return false;

									  throw;

									  }

									  finally

									  {

									  if (ftpStream != null)

									  {

									   ftpStream.Close();

									  }

									  if (outputStream != null)

									  {

									   outputStream.Close();

									  }

									  if (response != null)

									  {

									   response.Close();

									  }

									  }

									 }

									 /// <summary>

									 /// 从FTP服务器下载文件，指定本地路径和本地文件名

									 /// </summary>

									 /// <param name="remoteFileName">远程文件名</param>

									 /// <param name="localFileName">保存本地的文件名（包含路径）</param>

									 /// <param name="ifCredential">是否启用身份验证（false：表示允许用户匿名下载）</param>

									 /// <param name="updateProgress">报告进度的处理(第一个参数：总大小，第二个参数：当前进度)</param>

									 /// <param name="brokenOpen">是否断点下载：true 会在localFileName 找是否存在已经下载的文件，并计算文件流大小</param>

									 /// <returns>是否下载成功</returns>

									 public static bool FtpDownload(string remoteFileName, string localFileName, bool ifCredential, bool brokenOpen, Action<int, int> updateProgress = null)

									 {

									  if (brokenOpen)

									  {

									  try

									  {

									   long size = 0;

									   if (File.Exists(localFileName))

									   {

									   using (FileStream outputStream = new FileStream(localFileName, FileMode.Open))

									   {

									    size = outputStream.Length;

									   }

									   }

									   return FtpBrokenDownload(remoteFileName, localFileName, ifCredential, size, updateProgress);

									  }

									  catch

									  {

									   throw;

									  }

									  }

									  else

									  {

									  return FtpDownload(remoteFileName, localFileName, ifCredential, updateProgress);

									  }

									 }

									 #endregion

									 #region 上传文件到FTP服务器

									 /// <summary>

									 /// 上传文件到FTP服务器

									 /// </summary>

									 /// <param name="localFullPath">本地带有完整路径的文件名</param>

									 /// <param name="updateProgress">报告进度的处理(第一个参数：总大小，第二个参数：当前进度)</param>

									 /// <returns>是否下载成功</returns>

									 public static bool FtpUploadFile(string localFullPathName, Action<int, int> updateProgress = null)

									 {

									  FtpWebRequest reqFTP;

									  Stream stream = null;

									  FtpWebResponse response = null;

									  FileStream fs = null;

									  try

									  {

									  FileInfo finfo = new FileInfo(localFullPathName);

									  if (FtpServerIP == null || FtpServerIP.Trim().Length == 0)

									  {

									   throw new Exception("ftp上传目标服务器地址未设置！");

									  }

									  Uri uri = new Uri("ftp://" + FtpServerIP + "/" + finfo.Name);

									  reqFTP = (FtpWebRequest)FtpWebRequest.Create(uri);

									  reqFTP.KeepAlive = false;

									  reqFTP.UseBinary = true;

									  reqFTP.Credentials = new NetworkCredential(FtpUserID, FtpPassword);//用户，密码

									  reqFTP.Method = WebRequestMethods.Ftp.UploadFile;//向服务器发出下载请求命令

									  reqFTP.ContentLength = finfo.Length;//为request指定上传文件的大小

									  response = reqFTP.GetResponse() as FtpWebResponse;

									  reqFTP.ContentLength = finfo.Length;

									  int buffLength = 1024;

									  byte[] buff = new byte[buffLength];

									  int contentLen;

									  fs = finfo.OpenRead();

									  stream = reqFTP.GetRequestStream();

									  contentLen = fs.Read(buff, 0, buffLength);

									  int allbye = (int)finfo.Length;

									  //更新进度 

									  if (updateProgress != null)

									  {

									   updateProgress((int)allbye, 0);//更新进度条 

									  }

									  int startbye = 0;

									  while (contentLen != 0)

									  {

									   startbye = contentLen + startbye;

									   stream.Write(buff, 0, contentLen);

									   //更新进度 

									   if (updateProgress != null)

									   {

									   updateProgress((int)allbye, (int)startbye);//更新进度条 

									   }

									   contentLen = fs.Read(buff, 0, buffLength);

									  }

									  stream.Close();

									  fs.Close();

									  response.Close();

									  return true;

									  }

									  catch (Exception ex)

									  {

									  return false;

									  throw;

									  }

									  finally

									  {

									  if (fs != null)

									  {

									   fs.Close();

									  }

									  if (stream != null)

									  {

									   stream.Close();

									  }

									  if (response != null)

									  {

									   response.Close();

									  }

									  }

									 }

									 /// <summary>

									 /// 上传文件到FTP服务器(断点续传)

									 /// </summary>

									 /// <param name="localFullPath">本地文件全路径名称：C:\Users\JianKunKing\Desktop\IronPython脚本测试工具</param>

									 /// <param name="remoteFilepath">远程文件所在文件夹路径</param>

									 /// <param name="updateProgress">报告进度的处理(第一个参数：总大小，第二个参数：当前进度)</param>

									 /// <returns></returns> 

									 public static bool FtpUploadBroken(string localFullPath, string remoteFilepath, Action<int, int> updateProgress = null)

									 {

									  if (remoteFilepath == null)

									  {

									  remoteFilepath = "";

									  }

									  string newFileName = string.Empty;

									  bool success = true;

									  FileInfo fileInf = new FileInfo(localFullPath);

									  long allbye = (long)fileInf.Length;

									  if (fileInf.Name.IndexOf("#") == -1)

									  {

									  newFileName = RemoveSpaces(fileInf.Name);

									  }

									  else

									  {

									  newFileName = fileInf.Name.Replace("#", "＃");

									  newFileName = RemoveSpaces(newFileName);

									  }

									  long startfilesize = GetFileSize(newFileName, remoteFilepath);

									  if (startfilesize >= allbye)

									  {

									  return false;

									  }

									  long startbye = startfilesize;

									  //更新进度 

									  if (updateProgress != null)

									  {

									  updateProgress((int)allbye, (int)startfilesize);//更新进度条 

									  }

									  string uri;

									  if (remoteFilepath.Length == 0)

									  {

									  uri = "ftp://" + FtpServerIP + "/" + newFileName;

									  }

									  else

									  {

									  uri = "ftp://" + FtpServerIP + "/" + remoteFilepath + "/" + newFileName;

									  }

									  FtpWebRequest reqFTP;

									  // 根据uri创建FtpWebRequest对象 

									  reqFTP = (FtpWebRequest)FtpWebRequest.Create(new Uri(uri));

									  // ftp用户名和密码 

									  reqFTP.Credentials = new NetworkCredential(FtpUserID, FtpPassword);

									  // 默认为true，连接不会被关闭 

									  // 在一个命令之后被执行 

									  reqFTP.KeepAlive = false;

									  // 指定执行什么命令 

									  reqFTP.Method = WebRequestMethods.Ftp.AppendFile;

									  // 指定数据传输类型 

									  reqFTP.UseBinary = true;

									  // 上传文件时通知服务器文件的大小 

									  reqFTP.ContentLength = fileInf.Length;

									  int buffLength = 2048;// 缓冲大小设置为2kb 

									  byte[] buff = new byte[buffLength];

									  // 打开一个文件流 (System.IO.FileStream) 去读上传的文件 

									  FileStream fs = fileInf.OpenRead();

									  Stream strm = null;

									  try

									  {

									  // 把上传的文件写入流 

									  strm = reqFTP.GetRequestStream();

									  // 每次读文件流的2kb 

									  fs.Seek(startfilesize, 0);

									  int contentLen = fs.Read(buff, 0, buffLength);

									  // 流内容没有结束 

									  while (contentLen != 0)

									  {

									   // 把内容从file stream 写入 upload stream 

									   strm.Write(buff, 0, contentLen);

									   contentLen = fs.Read(buff, 0, buffLength);

									   startbye += contentLen;

									   //更新进度 

									   if (updateProgress != null)

									   {

									   updateProgress((int)allbye, (int)startbye);//更新进度条 

									   }

									  }

									  // 关闭两个流 

									  strm.Close();

									  fs.Close();

									  }

									  catch

									  {

									  success = false;

									  throw;

									  }

									  finally

									  {

									  if (fs != null)

									  {

									   fs.Close();

									  }

									  if (strm != null)

									  {

									   strm.Close();

									  }

									  }

									  return success;

									 }

									 /// <summary>

									 /// 去除空格

									 /// </summary>

									 /// <param name="str"></param>

									 /// <returns></returns>

									 private static string RemoveSpaces(string str)

									 {

									  string a = "";

									  CharEnumerator CEnumerator = str.GetEnumerator();

									  while (CEnumerator.MoveNext())

									  {

									  byte[] array = new byte[1];

									  array = System.Text.Encoding.ASCII.GetBytes(CEnumerator.Current.ToString());

									  int asciicode = (short)(array[0]);

									  if (asciicode != 32)

									  {

									   a += CEnumerator.Current.ToString();

									  }

									  }

									  string sdate = System.DateTime.Now.Year.ToString() + System.DateTime.Now.Month.ToString() + System.DateTime.Now.Day.ToString() + System.DateTime.Now.Hour.ToString()

									  + System.DateTime.Now.Minute.ToString() + System.DateTime.Now.Second.ToString() + System.DateTime.Now.Millisecond.ToString();

									  return a.Split('.')[a.Split('.').Length - 2] + "." + a.Split('.')[a.Split('.').Length - 1];

									 }

									 /// <summary>

									 /// 获取已上传文件大小

									 /// </summary>

									 /// <param name="filename">文件名称</param>

									 /// <param name="path">服务器文件路径</param>

									 /// <returns></returns>

									 public static long GetFileSize(string filename, string remoteFilepath)

									 {

									  long filesize = 0;

									  try

									  {

									  FtpWebRequest reqFTP;

									  FileInfo fi = new FileInfo(filename);

									  string uri;

									  if (remoteFilepath.Length == 0)

									  {

									   uri = "ftp://" + FtpServerIP + "/" + fi.Name;

									  }

									  else

									  {

									   uri = "ftp://" + FtpServerIP + "/" + remoteFilepath + "/" + fi.Name;

									  }

									  reqFTP = (FtpWebRequest)FtpWebRequest.Create(uri);

									  reqFTP.KeepAlive = false;

									  reqFTP.UseBinary = true;

									  reqFTP.Credentials = new NetworkCredential(FtpUserID, FtpPassword);//用户，密码

									  reqFTP.Method = WebRequestMethods.Ftp.GetFileSize;

									  FtpWebResponse response = (FtpWebResponse)reqFTP.GetResponse();

									  filesize = response.ContentLength;

									  return filesize;

									  }

									  catch

									  {

									  return 0;

									  }

									 }

									 //public void Connect(String path, string ftpUserID, string ftpPassword)//连接ftp

									 //{

									 // // 根据uri创建FtpWebRequest对象

									 // reqFTP = (FtpWebRequest)FtpWebRequest.Create(new Uri(path));

									 // // 指定数据传输类型

									 // reqFTP.UseBinary = true;

									 // // ftp用户名和密码

									 // reqFTP.Credentials = new NetworkCredential(ftpUserID, ftpPassword);

									 //}

									 #endregion

									 #region 获取当前目录下明细

									 /// <summary>

									 /// 获取当前目录下明细(包含文件和文件夹)

									 /// </summary>

									 /// <returns></returns>

									 public static string[] GetFilesDetailList()

									 {

									  string[] downloadFiles;

									  try

									  {

									  StringBuilder result = new StringBuilder();

									  FtpWebRequest ftp;

									  ftp = (FtpWebRequest)FtpWebRequest.Create(new Uri(ftpURI));

									  ftp.Credentials = new NetworkCredential(FtpUserID, FtpPassword);

									  ftp.Method = WebRequestMethods.Ftp.ListDirectoryDetails;

									  WebResponse response = ftp.GetResponse();

									  StreamReader reader = new StreamReader(response.GetResponseStream(), Encoding.Default);

									  string line = reader.ReadLine();

									  while (line != null)

									  {

									   result.Append(line);

									   result.Append("\n");

									   line = reader.ReadLine();

									  }

									  result.Remove(result.ToString().LastIndexOf("\n"), 1);

									  reader.Close();

									  response.Close();

									  return result.ToString().Split('\n');

									  }

									  catch (Exception ex)

									  {

									  downloadFiles = null;

									  throw ex;

									  }

									 }

									 /// <summary>

									 /// 获取当前目录下文件列表(仅文件)

									 /// </summary>

									 /// <returns></returns>

									 public static string[] GetFileList(string mask)

									 {

									  string[] downloadFiles;

									  StringBuilder result = new StringBuilder();

									  FtpWebRequest reqFTP;

									  try

									  {

									  reqFTP = (FtpWebRequest)FtpWebRequest.Create(new Uri(ftpURI));

									  reqFTP.UseBinary = true;

									  reqFTP.Credentials = new NetworkCredential(FtpUserID, FtpPassword);

									  reqFTP.Method = WebRequestMethods.Ftp.ListDirectory;

									  WebResponse response = reqFTP.GetResponse();

									  StreamReader reader = new StreamReader(response.GetResponseStream(), Encoding.Default);

									  string line = reader.ReadLine();

									  while (line != null)

									  {

									   if (mask.Trim() != string.Empty && mask.Trim() != "*.*")

									   {

									   string mask_ = mask.Substring(0, mask.IndexOf("*"));

									   if (line.Substring(0, mask_.Length) == mask_)

									   {

									    result.Append(line);

									    result.Append("\n");

									   }

									   }

									   else

									   {

									   result.Append(line);

									   result.Append("\n");

									   }

									   line = reader.ReadLine();

									  }

									  result.Remove(result.ToString().LastIndexOf('\n'), 1);

									  reader.Close();

									  response.Close();

									  return result.ToString().Split('\n');

									  }

									  catch (Exception ex)

									  {

									  downloadFiles = null;

									  throw ex;

									  }

									 }

									 /// <summary>

									 /// 获取当前目录下所有的文件夹列表(仅文件夹)

									 /// </summary>

									 /// <returns></returns>

									 public static string[] GetDirectoryList()

									 {

									  string[] drectory = GetFilesDetailList();

									  string m = string.Empty;

									  foreach (string str in drectory)

									  {

									  int dirPos = str.IndexOf("<DIR>");

									  if (dirPos > 0)

									  {

									   /*判断 Windows 风格*/

									   m += str.Substring(dirPos + 5).Trim() + "\n";

									  }

									  else if (str.Trim().Substring(0, 1).ToUpper() == "D")

									  {

									   /*判断 Unix 风格*/

									   string dir = str.Substring(54).Trim();

									   if (dir != "." && dir != "..")

									   {

									   m += dir + "\n";

									   }

									  }

									  }

									  char[] n = new char[] { '\n' };

									  return m.Split(n);

									 }

									 #endregion

									 #region 删除文件及文件夹

									 /// <summary>

									 /// 删除文件

									 /// </summary>

									 /// <param name="fileName"></param>

									 public static bool Delete(string fileName)

									 {

									  try

									  {

									  string uri = ftpURI + fileName;

									  FtpWebRequest reqFTP;

									  reqFTP = (FtpWebRequest)FtpWebRequest.Create(new Uri(uri));

									  reqFTP.Credentials = new NetworkCredential(FtpUserID, FtpPassword);

									  reqFTP.KeepAlive = false;

									  reqFTP.Method = WebRequestMethods.Ftp.DeleteFile;

									  string result = String.Empty;

									  FtpWebResponse response = (FtpWebResponse)reqFTP.GetResponse();

									  long size = response.ContentLength;

									  Stream datastream = response.GetResponseStream();

									  StreamReader sr = new StreamReader(datastream);

									  result = sr.ReadToEnd();

									  sr.Close();

									  datastream.Close();

									  response.Close();

									  return true;

									  }

									  catch (Exception ex)

									  {

									  return false;

									  throw ex;

									  }

									 }

									 /// <summary>

									 /// 删除文件夹

									 /// </summary>

									 /// <param name="folderName"></param>

									 public static void RemoveDirectory(string folderName)

									 {

									  try

									  {

									  string uri = ftpURI + folderName;

									  FtpWebRequest reqFTP;

									  reqFTP = (FtpWebRequest)FtpWebRequest.Create(new Uri(uri));

									  reqFTP.Credentials = new NetworkCredential(FtpUserID, FtpPassword);

									  reqFTP.KeepAlive = false;

									  reqFTP.Method = WebRequestMethods.Ftp.RemoveDirectory;

									  string result = String.Empty;

									  FtpWebResponse response = (FtpWebResponse)reqFTP.GetResponse();

									  long size = response.ContentLength;

									  Stream datastream = response.GetResponseStream();

									  StreamReader sr = new StreamReader(datastream);

									  result = sr.ReadToEnd();

									  sr.Close();

									  datastream.Close();

									  response.Close();

									  }

									  catch (Exception ex)

									  {

									  throw ex;

									  }

									 }

									 #endregion

									 #region 其他操作

									 /// <summary>

									 /// 获取指定文件大小

									 /// </summary>

									 /// <param name="filename"></param>

									 /// <returns></returns>

									 public static long GetFileSize(string filename)

									 {

									  FtpWebRequest reqFTP;

									  long fileSize = 0;

									  try

									  {

									  reqFTP = (FtpWebRequest)FtpWebRequest.Create(new Uri(ftpURI + filename));

									  reqFTP.Method = WebRequestMethods.Ftp.GetFileSize;

									  reqFTP.UseBinary = true;

									  reqFTP.Credentials = new NetworkCredential(FtpUserID, FtpPassword);

									  FtpWebResponse response = (FtpWebResponse)reqFTP.GetResponse();

									  Stream ftpStream = response.GetResponseStream();

									  fileSize = response.ContentLength;

									  ftpStream.Close();

									  response.Close();

									  }

									  catch (Exception ex)

									  {

									  throw ex;

									  }

									  return fileSize;

									 }

									 /// <summary>

									 /// 判断当前目录下指定的子目录是否存在

									 /// </summary>

									 /// <param name="RemoteDirectoryName">指定的目录名</param>

									 public bool DirectoryExist(string RemoteDirectoryName)

									 {

									  try

									  {

									  string[] dirList = GetDirectoryList();

									  foreach (string str in dirList)

									  {

									   if (str.Trim() == RemoteDirectoryName.Trim())

									   {

									   return true;

									   }

									  }

									  return false;

									  }

									  catch

									  {

									  return false;

									  }

									 }

									 /// <summary>

									 /// 判断当前目录下指定的文件是否存在

									 /// </summary>

									 /// <param name="RemoteFileName">远程文件名</param>

									 public bool FileExist(string RemoteFileName)

									 {

									  string[] fileList = GetFileList("*.*");

									  foreach (string str in fileList)

									  {

									  if (str.Trim() == RemoteFileName.Trim())

									  {

									   return true;

									  }

									  }

									  return false;

									 }

									 /// <summary>

									 /// 创建文件夹

									 /// </summary>

									 /// <param name="dirName"></param>

									 public void MakeDir(string dirName)

									 {

									  FtpWebRequest reqFTP;

									  try

									  {

									  // dirName = name of the directory to create.

									  reqFTP = (FtpWebRequest)FtpWebRequest.Create(new Uri(ftpURI + dirName));

									  reqFTP.Method = WebRequestMethods.Ftp.MakeDirectory;

									  reqFTP.UseBinary = true;

									  reqFTP.Credentials = new NetworkCredential(FtpUserID, FtpPassword);

									  FtpWebResponse response = (FtpWebResponse)reqFTP.GetResponse();

									  Stream ftpStream = response.GetResponseStream();

									  ftpStream.Close();

									  response.Close();

									  }

									  catch (Exception ex)

									  {

									  throw ex;

									  }

									 }

									 /// <summary>

									 /// 改名

									 /// </summary>

									 /// <param name="currentFilename"></param>

									 /// <param name="newFilename"></param>

									 public void ReName(string currentFilename, string newFilename)

									 {

									  FtpWebRequest reqFTP;

									  try

									  {

									  reqFTP = (FtpWebRequest)FtpWebRequest.Create(new Uri(ftpURI + currentFilename));

									  reqFTP.Method = WebRequestMethods.Ftp.Rename;

									  reqFTP.RenameTo = newFilename;

									  reqFTP.UseBinary = true;

									  reqFTP.Credentials = new NetworkCredential(FtpUserID, FtpPassword);

									  FtpWebResponse response = (FtpWebResponse)reqFTP.GetResponse();

									  Stream ftpStream = response.GetResponseStream();

									  ftpStream.Close();

									  response.Close();

									  }

									  catch (Exception ex)

									  {

									  throw ex;

									  }

									 }

									 /// <summary>

									 /// 移动文件

									 /// </summary>

									 /// <param name="currentFilename"></param>

									 /// <param name="newFilename"></param>

									 public void MovieFile(string currentFilename, string newDirectory)

									 {

									  ReName(currentFilename, newDirectory);

									 }

									 /// <summary>

									 /// 切换当前目录

									 /// </summary>

									 /// <param name="DirectoryName"></param>

									 /// <param name="IsRoot">true 绝对路径 false 相对路径</param>

									 public void GotoDirectory(string DirectoryName, bool IsRoot)

									 {

									  if (IsRoot)

									  {

									  ftpRemotePath = DirectoryName;

									  }

									  else

									  {

									  ftpRemotePath += DirectoryName + "/";

									  }

									  ftpURI = "ftp://" + FtpServerIP + "/" + ftpRemotePath + "/";

									 } 

									 #endregion

									 }

									}