/*FTP操作公共類*/
 
  private string FtpIp, FtpPort, FtpUser, FtpPwd, FtpUrl;
 
  private FTPUtil()
  {
 
  }
 
  public FTPUtil(string ftpIp, string ftpPort, string ftpUser, string ftpPwd)
  {
      FtpIp = ftpIp;
      FtpPort = ftpPort;
      FtpUser = ftpUser;
      FtpPwd = ftpPwd;
 
      FtpUrl = "ftp://" + ftpIp + ":" + ftpPort + "/";
  }
 
  private FtpWebRequest GetFtpWebRequest(string path, string method)
  {
      FtpWebRequest Ftp = (FtpWebRequest)FtpWebRequest.Create(new Uri(FtpUrl + "/" + path));
      Ftp.Credentials = new NetworkCredential(FtpUser, FtpPwd);
      Ftp.KeepAlive = false;
      Ftp.UsePassive = true;
      Ftp.Method = method;
      return Ftp;
  }
 
  /// <summary>
  /// 獲取路徑下所有文件夾
  /// </summary>
  /// <param name="dirName"></param>
  /// <returns></returns>
  public List<FileModel> GetDirs(string dirName)
  {
      return GetAllFiles(dirName).FindAll(s => s.Type == "文件夾");
  }
 
  /// <summary>
  /// 獲取路徑下所有文件
  /// </summary>
  /// <param name="dirName"></param>
  /// <returns></returns>
  public List<FileModel> GetFiles(string dirName)
  {
      return GetAllFiles(dirName).FindAll(s => s.Type == "文件");
  }
 
  /// <summary>
  /// 獲取路徑下所有項(xiàng)目
  /// </summary>
  /// <param name="dirName"></param>
  /// <returns></returns>
  public List<FileModel> GetAllFiles(string dirName)
  {
      List<FileModel> fileList = new List<FileModel>();
      try
      {
          FtpWebRequest Ftp = GetFtpWebRequest(dirName, WebRequestMethods.Ftp.ListDirectoryDetails);
 
          using (WebResponse response = Ftp.GetResponse())
          {
              using (StreamReader reader = new StreamReader(response.GetResponseStream(), Encoding.UTF8))
              {
                  string line = "";
                  while ((line = reader.ReadLine()) != null)
                  {
                      fileList.Add(ConvertFile(line, dirName));
                  }
              }
          }
      }
      catch (Exception ex)
      {
          throw ex;
      }
      return fileList;
  }
 
  /// <summary>
  /// FTP文件信息轉(zhuǎn)換
  /// </summary>
  /// <param name="value"></param>
  /// <param name="dirName"></param>
  /// <returns></returns>
  private FileModel ConvertFile(string value, string dirName)
  {
      string[] arr = value.Split(new string[] { " " },4, StringSplitOptions.RemoveEmptyEntries);
 
     FileModel model = new FileModel();
      model.Date = arr[0];
      model.Time = arr[1];
      if (arr[2] == "<DIR>")
      {
          model.Type = "文件夾";
          model.Size = 0;
      }
      else
      {
          model.Type = "文件";
          model.Size = Convert.ToInt64(arr[2]);
      }
      model.Name = arr[3];
      model.FullName = dirName + "/" + model.Name;
      return model;
  }
 
  /// <summary>
  /// 上傳
  /// </summary>
  /// <param name="fileName"></param>
  /// <param name="desFile"></param>
  public void Upload(string fileName, string desFile)
  {
      try
      {
          FileInfo fileInfo = new FileInfo(fileName);
 
          FtpWebRequest Ftp = GetFtpWebRequest(desFile, WebRequestMethods.Ftp.UploadFile);
          Ftp.UseBinary = true;
          Ftp.ContentLength = fileInfo.Length;
 
 
          int buffLength = 2048;
          byte[] buff = new byte[buffLength];
          int len = 0;
          using (FileStream fs = fileInfo.OpenRead())
          {
              using (Stream stream = Ftp.GetRequestStream())
              {
                  while ((len = fs.Read(buff, 0, buffLength)) != 0)
                  {
                      stream.Write(buff, 0, buffLength);
                  }
              }
          }
      }
      catch (Exception ex)
      {
          throw ex;
      }
 
 
  }
 
  /// <summary>
  /// 下載
  /// </summary>
  /// <param name="fileName"></param>
  /// <param name="desFile"></param>
  public void DownLoad(string fileName, string desFile)
  {
      try
      {
          FtpWebRequest Ftp = GetFtpWebRequest(fileName, WebRequestMethods.Ftp.DownloadFile);
          Ftp.UseBinary = true;
 
          FtpWebResponse response = (FtpWebResponse)Ftp.GetResponse();
          int buffLength = 2048;
          byte[] buff = new byte[buffLength];
          int len = 0;
          using (FileStream fs = new FileStream(desFile, FileMode.Create))
          {
              using (Stream stream = response.GetResponseStream())
              {
                  while ((len = stream.Read(buff, 0, buffLength)) != 0)
                  {
                      fs.Write(buff, 0, buffLength);
                  }
              }
          }
      }
      catch (Exception ex)
      {
          throw ex;
      }
  }
 
  /// <summary>
  /// 刪除文件
  /// </summary>
  /// <param name="fileName"></param>
  public void DeleteFile(string fileName)
  {
      try
      {
          FtpWebRequest Ftp = GetFtpWebRequest(fileName, WebRequestMethods.Ftp.DeleteFile);
 
          FtpWebResponse response = (FtpWebResponse)Ftp.GetResponse();
 
          using (Stream datastream = response.GetResponseStream())
          {
              using (StreamReader sr = new StreamReader(datastream))
              {
                  sr.ReadToEnd();
              }
          }
      }
      catch (Exception ex)
      {
          throw ex;
      }
  }
 
 
  /// <summary>
  /// 重命名
  /// </summary>
  /// <param name="fileName"></param>
  /// <param name="newName"></param>
  public void ReName(string fileName, string newName)
  {
      try
      {
          FtpWebRequest Ftp = GetFtpWebRequest(fileName, WebRequestMethods.Ftp.Rename);
          Ftp.RenameTo = newName;
          Ftp.UseBinary = true;
 
          FtpWebResponse response = (FtpWebResponse)Ftp.GetResponse();
 
          using (Stream datastream = response.GetResponseStream())
          {
              using (StreamReader sr = new StreamReader(datastream))
              {
                  sr.ReadToEnd();
              }
          }
      }
      catch (Exception ex)
      {
          throw ex;
      }
  }