FTPClientHelper辅助类 实现文件上传，目录操作，下载等操作

string userName = "xxx";string password = "xxx";var ftp = new FTPClientHelper("xxx", ".", userName, password, 1021);

//-------------------------------------------------------------------------------------// All Rights Reserved , Copyright (C) 2015 , ZTO , Ltd .//-------------------------------------------------------------------------------------using System;using System.IO;using System.Net;using System.Net.Sockets;using System.Text;using System.Threading;namespace ZTO.PicTest.Utilities{  /// <summary>  /// FTP操作帮助类  ///  /// 修改纪录  ///  ///     2016-4-4 版本：1.0 YangHengLian 创建主键，注意命名空间的排序，测试非常好。  ///   /// 版本：1.0  ///  /// <author>  ///    <name>YangHengLian</name>  ///    <date>2016-4-4</date>  /// </author>  /// </summary>  public class FTPClientHelper  {    public static object Obj = new object();    #region 构造函数    /// <summary>    /// 缺省构造函数    /// </summary>    public FTPClientHelper()    {      RemoteHost = "";      _strRemotePath = "";      _strRemoteUser = "";      _strRemotePass = "";      _strRemotePort = 21;      _bConnected = false;    }    /// <summary>    /// 构造函数    /// </summary>    public FTPClientHelper(string remoteHost, string remotePath, string remoteUser, string remotePass, int remotePort)    {      // Ip地址      RemoteHost = remoteHost;      // 这个很重要，表示连接路径，如果是.表示根目录      _strRemotePath = remotePath;      // 登录账号      _strRemoteUser = remoteUser;      // 登录密码      _strRemotePass = remotePass;      // ftp端口号      _strRemotePort = remotePort;      Connect();    }    #endregion    #region 字段    private int _strRemotePort;    private Boolean _bConnected;    private string _strRemotePass;    private string _strRemoteUser;    private string _strRemotePath;    /// <summary>    /// 服务器返回的应答信息(包含应答码)    /// </summary>    private string _strMsg;    /// <summary>    /// 服务器返回的应答信息(包含应答码)    /// </summary>    private string _strReply;    /// <summary>    /// 服务器返回的应答码    /// </summary>    private int _iReplyCode;    /// <summary>    /// 进行控制连接的socket    /// </summary>    private Socket _socketControl;    /// <summary>    /// 传输模式    /// </summary>    private TransferType _trType;    /// <summary>    /// 接收和发送数据的缓冲区    /// </summary>    private const int BlockSize = 512;    /// <summary>    /// 编码方式    /// </summary>    readonly Encoding _ascii = Encoding.ASCII;    /// <summary>    /// 字节数组    /// </summary>    readonly Byte[] _buffer = new Byte[BlockSize];    #endregion    #region 属性    /// <summary>    /// FTP服务器IP地址    /// </summary>    public string RemoteHost { get; set; }    /// <summary>    /// FTP服务器端口    /// </summary>    public int RemotePort    {      get      {        return _strRemotePort;      }      set      {        _strRemotePort = value;      }    }    /// <summary>    /// 当前服务器目录    /// </summary>    public string RemotePath    {      get      {        return _strRemotePath;      }      set      {        _strRemotePath = value;      }    }    /// <summary>    /// 登录用户账号    /// </summary>    public string RemoteUser    {      set      {        _strRemoteUser = value;      }    }    /// <summary>    /// 用户登录密码    /// </summary>    public string RemotePass    {      set      {        _strRemotePass = value;      }    }    /// <summary>    /// 是否登录    /// </summary>    public bool Connected    {      get      {        return _bConnected;      }    }    #endregion    #region 链接    /// <summary>    /// 建立连接     /// </summary>    public void Connect()    {      lock (Obj)      {        _socketControl = new Socket(AddressFamily.InterNetwork, SocketType.Stream, ProtocolType.Tcp);        var ep = new IPEndPoint(IPAddress.Parse(RemoteHost), _strRemotePort);        try        {          _socketControl.Connect(ep);        }        catch (Exception)        {          throw new IOException("不能连接ftp服务器");        }      }      ReadReply();      if (_iReplyCode != 220)      {        DisConnect();        throw new IOException(_strReply.Substring(4));      }      SendCommand("USER " + _strRemoteUser);      if (!(_iReplyCode == 331 || _iReplyCode == 230))      {        CloseSocketConnect();        throw new IOException(_strReply.Substring(4));      }      if (_iReplyCode != 230)      {        SendCommand("PASS " + _strRemotePass);        if (!(_iReplyCode == 230 || _iReplyCode == 202))        {          CloseSocketConnect();          throw new IOException(_strReply.Substring(4));        }      }      _bConnected = true;      ChDir(_strRemotePath);    }    /// <summary>    /// 关闭连接    /// </summary>    public void DisConnect()    {      if (_socketControl != null)      {        SendCommand("QUIT");      }      CloseSocketConnect();    }    #endregion    #region 传输模式    /// <summary>    /// 传输模式:二进制类型、ASCII类型    /// </summary>    public enum TransferType { Binary, ASCII };    /// <summary>    /// 设置传输模式    /// </summary>    /// <param name="ttType">传输模式</param>    public void SetTransferType(TransferType ttType)    {      SendCommand(ttType == TransferType.Binary ? "TYPE I" : "TYPE A");      if (_iReplyCode != 200)      {        throw new IOException(_strReply.Substring(4));      }      _trType = ttType;    }    /// <summary>    /// 获得传输模式    /// </summary>    /// <returns>传输模式</returns>    public TransferType GetTransferType()    {      return _trType;    }    #endregion    #region 文件操作    /// <summary>    /// 获得文件列表    /// </summary>    /// <param name="strMask">文件名的匹配字符串</param>    public string[] Dir(string strMask)    {      if (!_bConnected)      {        Connect();      }      Socket socketData = CreateDataSocket();      SendCommand("NLST " + strMask);      if (!(_iReplyCode == 150 || _iReplyCode == 125 || _iReplyCode == 226))      {        throw new IOException(_strReply.Substring(4));      }      _strMsg = "";      Thread.Sleep(2000);      while (true)      {        int iBytes = socketData.Receive(_buffer, _buffer.Length, 0);        _strMsg += _ascii.GetString(_buffer, 0, iBytes);        if (iBytes < _buffer.Length)        {          break;        }      }      char[] seperator = { '/n' };      string[] strsFileList = _strMsg.Split(seperator);      socketData.Close(); //数据socket关闭时也会有返回码      if (_iReplyCode != 226)      {        ReadReply();        if (_iReplyCode != 226)        {          throw new IOException(_strReply.Substring(4));        }      }      return strsFileList;    }    public void NewPutByGuid(string strFileName, string strGuid)    {      if (!_bConnected)      {        Connect();      }      string str = strFileName.Substring(0, strFileName.LastIndexOf("//", StringComparison.Ordinal));      string strTypeName = strFileName.Substring(strFileName.LastIndexOf(".", StringComparison.Ordinal));      strGuid = str + "//" + strGuid;      Socket socketData = CreateDataSocket();      SendCommand("STOR " + Path.GetFileName(strGuid));      if (!(_iReplyCode == 125 || _iReplyCode == 150))      {        throw new IOException(_strReply.Substring(4));      }      var input = new FileStream(strGuid, FileMode.Open);      input.Flush();      int iBytes;      while ((iBytes = input.Read(_buffer, 0, _buffer.Length)) > 0)      {        socketData.Send(_buffer, iBytes, 0);      }      input.Close();      if (socketData.Connected)      {        socketData.Close();      }      if (!(_iReplyCode == 226 || _iReplyCode == 250))      {        ReadReply();        if (!(_iReplyCode == 226 || _iReplyCode == 250))        {          throw new IOException(_strReply.Substring(4));        }      }    }    /// <summary>    /// 获取文件大小    /// </summary>    /// <param name="strFileName">文件名</param>    /// <returns>文件大小</returns>    public long GetFileSize(string strFileName)    {      if (!_bConnected)      {        Connect();      }      SendCommand("SIZE " + Path.GetFileName(strFileName));      long lSize;      if (_iReplyCode == 213)      {        lSize = Int64.Parse(_strReply.Substring(4));      }      else      {        throw new IOException(_strReply.Substring(4));      }      return lSize;    }    /// <summary>    /// 获取文件信息    /// </summary>    /// <param name="strFileName">文件名</param>    /// <returns>文件大小</returns>    public string GetFileInfo(string strFileName)    {      if (!_bConnected)      {        Connect();      }      Socket socketData = CreateDataSocket();      SendCommand("LIST " + strFileName);      if (!(_iReplyCode == 150 || _iReplyCode == 125        || _iReplyCode == 226 || _iReplyCode == 250))      {        throw new IOException(_strReply.Substring(4));      }      byte[] b = new byte[512];      MemoryStream ms = new MemoryStream();      while (true)      {        int iBytes = socketData.Receive(b, b.Length, 0);        ms.Write(b, 0, iBytes);        if (iBytes <= 0)        {          break;        }      }      byte[] bt = ms.GetBuffer();      string strResult = Encoding.ASCII.GetString(bt);      ms.Close();      return strResult;    }    /// <summary>    /// 删除    /// </summary>    /// <param name="strFileName">待删除文件名</param>    public void Delete(string strFileName)    {      if (!_bConnected)      {        Connect();      }      SendCommand("DELE " + strFileName);      if (_iReplyCode != 250)      {        throw new IOException(_strReply.Substring(4));      }    }    /// <summary>    /// 重命名(如果新文件名与已有文件重名,将覆盖已有文件)    /// </summary>    /// <param name="strOldFileName">旧文件名</param>    /// <param name="strNewFileName">新文件名</param>    public void Rename(string strOldFileName, string strNewFileName)    {      if (!_bConnected)      {        Connect();      }      SendCommand("RNFR " + strOldFileName);      if (_iReplyCode != 350)      {        throw new IOException(_strReply.Substring(4));      }      // 如果新文件名与原有文件重名,将覆盖原有文件      SendCommand("RNTO " + strNewFileName);      if (_iReplyCode != 250)      {        throw new IOException(_strReply.Substring(4));      }    }    #endregion    #region 上传和下载    /// <summary>    /// 下载一批文件    /// </summary>    /// <param name="strFileNameMask">文件名的匹配字符串</param>    /// <param name="strFolder">本地目录(不得以/结束)</param>    public void Get(string strFileNameMask, string strFolder)    {      if (!_bConnected)      {        Connect();      }      string[] strFiles = Dir(strFileNameMask);      foreach (string strFile in strFiles)      {        if (!strFile.Equals(""))//一般来说strFiles的最后一个元素可能是空字符串        {          Get(strFile, strFolder, strFile);        }      }    }    /// <summary>    /// 下载一个文件    /// </summary>    /// <param name="strRemoteFileName">要下载的文件名</param>    /// <param name="strFolder">本地目录(不得以/结束)</param>    /// <param name="strLocalFileName">保存在本地时的文件名</param>    public void Get(string strRemoteFileName, string strFolder, string strLocalFileName)    {      Socket socketData = CreateDataSocket();      try      {        if (!_bConnected)        {          Connect();        }        SetTransferType(TransferType.Binary);        if (strLocalFileName.Equals(""))        {          strLocalFileName = strRemoteFileName;        }        SendCommand("RETR " + strRemoteFileName);        if (!(_iReplyCode == 150 || _iReplyCode == 125 || _iReplyCode == 226 || _iReplyCode == 250))        {          throw new IOException(_strReply.Substring(4));        }        var output = new FileStream(strFolder + "//" + strLocalFileName, FileMode.Create);        while (true)        {          int iBytes = socketData.Receive(_buffer, _buffer.Length, 0);          output.Write(_buffer, 0, iBytes);          if (iBytes <= 0)          {            break;          }        }        output.Close();        if (socketData.Connected)        {          socketData.Close();        }        if (!(_iReplyCode == 226 || _iReplyCode == 250))        {          ReadReply();          if (!(_iReplyCode == 226 || _iReplyCode == 250))          {            throw new IOException(_strReply.Substring(4));          }        }      }      catch      {        socketData.Close();        _socketControl.Close();        _bConnected = false;        _socketControl = null;      }    }    /// <summary>    /// 下载一个文件    /// </summary>    /// <param name="strRemoteFileName">要下载的文件名</param>    /// <param name="strFolder">本地目录(不得以/结束)</param>    /// <param name="strLocalFileName">保存在本地时的文件名</param>    public void GetNoBinary(string strRemoteFileName, string strFolder, string strLocalFileName)    {      if (!_bConnected)      {        Connect();      }      if (strLocalFileName.Equals(""))      {        strLocalFileName = strRemoteFileName;      }      Socket socketData = CreateDataSocket();      SendCommand("RETR " + strRemoteFileName);      if (!(_iReplyCode == 150 || _iReplyCode == 125 || _iReplyCode == 226 || _iReplyCode == 250))      {        throw new IOException(_strReply.Substring(4));      }      var output = new FileStream(strFolder + "//" + strLocalFileName, FileMode.Create);      while (true)      {        int iBytes = socketData.Receive(_buffer, _buffer.Length, 0);        output.Write(_buffer, 0, iBytes);        if (iBytes <= 0)        {          break;        }      }      output.Close();      if (socketData.Connected)      {        socketData.Close();      }      if (!(_iReplyCode == 226 || _iReplyCode == 250))      {        ReadReply();        if (!(_iReplyCode == 226 || _iReplyCode == 250))        {          throw new IOException(_strReply.Substring(4));        }      }    }    /// <summary>    /// 上传一批文件    /// </summary>    /// <param name="strFolder">本地目录(不得以/结束)</param>    /// <param name="strFileNameMask">文件名匹配字符(可以包含*和?)</param>    public void Put(string strFolder, string strFileNameMask)    {      string[] strFiles = Directory.GetFiles(strFolder, strFileNameMask);      foreach (string strFile in strFiles)      {        Put(strFile);      }    }    /// <summary>    /// 上传一个文件    /// </summary>    /// <param name="strFileName">本地文件名</param>    public void Put(string strFileName)    {      if (!_bConnected)      {        Connect();      }      Socket socketData = CreateDataSocket();      if (Path.GetExtension(strFileName) == "")        SendCommand("STOR " + Path.GetFileNameWithoutExtension(strFileName));      else        SendCommand("STOR " + Path.GetFileName(strFileName));      if (!(_iReplyCode == 125 || _iReplyCode == 150))      {        throw new IOException(_strReply.Substring(4));      }      var input = new FileStream(strFileName, FileMode.Open);      int iBytes;      while ((iBytes = input.Read(_buffer, 0, _buffer.Length)) > 0)      {        socketData.Send(_buffer, iBytes, 0);      }      input.Close();      if (socketData.Connected)      {        socketData.Close();      }      if (!(_iReplyCode == 226 || _iReplyCode == 250))      {        ReadReply();        if (!(_iReplyCode == 226 || _iReplyCode == 250))        {          throw new IOException(_strReply.Substring(4));        }      }    }    /// <summary>    /// 上传一个文件    /// </summary>    /// <param name="strFileName">本地文件名</param>    ///     /// <param name="strGuid"> </param>    public void PutByGuid(string strFileName, string strGuid)    {      if (!_bConnected)      {        Connect();      }      string str = strFileName.Substring(0, strFileName.LastIndexOf("//", StringComparison.Ordinal));      string strTypeName = strFileName.Substring(strFileName.LastIndexOf(".", System.StringComparison.Ordinal));      strGuid = str + "//" + strGuid;      File.Copy(strFileName, strGuid);      File.SetAttributes(strGuid, FileAttributes.Normal);      Socket socketData = CreateDataSocket();      SendCommand("STOR " + Path.GetFileName(strGuid));      if (!(_iReplyCode == 125 || _iReplyCode == 150))      {        throw new IOException(_strReply.Substring(4));      }      var input = new FileStream(strGuid, FileMode.Open, System.IO.FileAccess.Read, System.IO.FileShare.Read);      int iBytes = 0;      while ((iBytes = input.Read(_buffer, 0, _buffer.Length)) > 0)      {        socketData.Send(_buffer, iBytes, 0);      }      input.Close();      File.Delete(strGuid);      if (socketData.Connected)      {        socketData.Close();      }      if (!(_iReplyCode == 226 || _iReplyCode == 250))      {        ReadReply();        if (!(_iReplyCode == 226 || _iReplyCode == 250))        {          throw new IOException(_strReply.Substring(4));        }      }    }    #endregion    #region 目录操作    /// <summary>    /// 创建目录    /// </summary>    /// <param name="strDirName">目录名</param>    public void MkDir(string strDirName)    {      if (!_bConnected)      {        Connect();      }      SendCommand("MKD " + strDirName);      if (_iReplyCode != 257)      {        throw new IOException(_strReply.Substring(4));      }    }    /// <summary>    /// 删除目录    /// </summary>    /// <param name="strDirName">目录名</param>    public void RmDir(string strDirName)    {      if (!_bConnected)      {        Connect();      }      SendCommand("RMD " + strDirName);      if (_iReplyCode != 250)      {        throw new IOException(_strReply.Substring(4));      }    }    /// <summary>    /// 改变目录    /// </summary>    /// <param name="strDirName">新的工作目录名</param>    public void ChDir(string strDirName)    {      if (strDirName.Equals(".") || strDirName.Equals(""))      {        return;      }      if (!_bConnected)      {        Connect();      }      SendCommand("CWD " + strDirName);      if (_iReplyCode != 250)      {        throw new IOException(_strReply.Substring(4));      }      this._strRemotePath = strDirName;    }    #endregion    #region 内部函数    /// <summary>    /// 将一行应答字符串记录在strReply和strMsg,应答码记录在iReplyCode    /// </summary>    private void ReadReply()    {      _strMsg = "";      _strReply = ReadLine();      _iReplyCode = Int32.Parse(_strReply.Substring(0, 3));    }    /// <summary>    /// 建立进行数据连接的socket    /// </summary>    /// <returns>数据连接socket</returns>    private Socket CreateDataSocket()    {      SendCommand("PASV");      if (_iReplyCode != 227)      {        throw new IOException(_strReply.Substring(4));      }      int index1 = _strReply.IndexOf('(');      int index2 = _strReply.IndexOf(')');      string ipData = _strReply.Substring(index1 + 1, index2 - index1 - 1);      int[] parts = new int[6];      int len = ipData.Length;      int partCount = 0;      string buf = "";      for (int i = 0; i < len && partCount <= 6; i++)      {        char ch = Char.Parse(ipData.Substring(i, 1));        if (Char.IsDigit(ch))          buf += ch;        else if (ch != ',')        {          throw new IOException("Malformed PASV strReply: " + _strReply);        }        if (ch == ',' || i + 1 == len)        {          try          {            parts[partCount++] = Int32.Parse(buf);            buf = "";          }          catch (Exception)          {            throw new IOException("Malformed PASV strReply: " + _strReply);          }        }      }      string ipAddress = parts[0] + "." + parts[1] + "." + parts[2] + "." + parts[3];      int port = (parts[4] << 8) + parts[5];      var s = new Socket(AddressFamily.InterNetwork, SocketType.Stream, ProtocolType.Tcp);      var ep = new IPEndPoint(IPAddress.Parse(ipAddress), port);      try      {        s.Connect(ep);      }      catch (Exception)      {        throw new IOException("无法连接ftp服务器");      }      return s;    }    /// <summary>    /// 关闭socket连接(用于登录以前)    /// </summary>    private void CloseSocketConnect()    {      lock (Obj)      {        if (_socketControl != null)        {          _socketControl.Close();          _socketControl = null;        }        _bConnected = false;      }    }    /// <summary>    /// 读取Socket返回的所有字符串    /// </summary>    /// <returns>包含应答码的字符串行</returns>    private string ReadLine()    {      lock (Obj)      {        while (true)        {          int iBytes = _socketControl.Receive(_buffer, _buffer.Length, 0);          _strMsg += _ascii.GetString(_buffer, 0, iBytes);          if (iBytes < _buffer.Length)          {            break;          }        }      }      char[] seperator = { '/n' };      string[] mess = _strMsg.Split(seperator);      if (_strMsg.Length > 2)      {        _strMsg = mess[mess.Length - 2];      }      else      {        _strMsg = mess[0];      }      if (!_strMsg.Substring(3, 1).Equals(" ")) //返回字符串正确的是以应答码(如220开头,后面接一空格,再接问候字符串)      {        return ReadLine();      }      return _strMsg;    }    /// <summary>    /// 发送命令并获取应答码和最后一行应答字符串    /// </summary>    /// <param name="strCommand">命令</param>    public void SendCommand(String strCommand)    {      lock (Obj)      {        Byte[] cmdBytes = Encoding.ASCII.GetBytes((strCommand + "/r/n").ToCharArray());        _socketControl.Send(cmdBytes, cmdBytes.Length, 0);        Thread.Sleep(100);        ReadReply();      }    }    #endregion  }}

#region 程序集 System.dll, v4.0.0.0// C:/Program Files (x86)/Reference Assemblies/Microsoft/Framework/.NETFramework/v4.0/System.dll#endregionusing System;namespace System.Net{  // 摘要:  //   System.Net.WebRequestMethods.Ftp、System.Net.WebRequestMethods.File 和 System.Net.WebRequestMethods.Http  //   类的容器类。无法继承此类  public static class WebRequestMethods  {    // 摘要:    //   表示可用于 FILE 请求的文件协议方法的类型。无法继承此类。    public static class File    {      // 摘要:      //   表示用来从指定的位置检索文件的 FILE GET 协议方法。      public const string DownloadFile = "GET";      //      // 摘要:      //   表示用来将文件复制到指定位置的 FILE PUT 协议方法。      public const string UploadFile = "PUT";    }    // 摘要:    //   表示可与 FTP 请求一起使用的 FTP 协议方法的类型。无法继承此类。    public static class Ftp    {      // 摘要:      //   表示要用于将文件追加到 FTP 服务器上的现有文件的 FTP APPE 协议方法。      public const string AppendFile = "APPE";      //      // 摘要:      //   表示要用于删除 FTP 服务器上的文件的 FTP DELE 协议方法。      public const string DeleteFile = "DELE";      //      // 摘要:      //   表示要用于从 FTP 服务器下载文件的 FTP RETR 协议方法。      public const string DownloadFile = "RETR";      //      // 摘要:      //   表示要用于从 FTP 服务器上的文件检索日期时间戳的 FTP MDTM 协议方法。      public const string GetDateTimestamp = "MDTM";      //      // 摘要:      //   表示要用于检索 FTP 服务器上的文件大小的 FTP SIZE 协议方法。      public const string GetFileSize = "SIZE";      //      // 摘要:      //   表示获取 FTP 服务器上的文件的简短列表的 FTP NLIST 协议方法。      public const string ListDirectory = "NLST";      //      // 摘要:      //   表示获取 FTP 服务器上的文件的详细列表的 FTP LIST 协议方法。      public const string ListDirectoryDetails = "LIST";      //      // 摘要:      //   表示在 FTP 服务器上创建目录的 FTP MKD 协议方法。      public const string MakeDirectory = "MKD";      //      // 摘要:      //   表示打印当前工作目录的名称的 FTP PWD 协议方法。      public const string PrintWorkingDirectory = "PWD";      //      // 摘要:      //   表示移除目录的 FTP RMD 协议方法。      public const string RemoveDirectory = "RMD";      //      // 摘要:      //   表示重命名目录的 FTP RENAME 协议方法。      public const string Rename = "RENAME";      //      // 摘要:      //   表示将文件上载到 FTP 服务器的 FTP STOR 协议方法。      public const string UploadFile = "STOR";      //      // 摘要:      //   表示将具有唯一名称的文件上载到 FTP 服务器的 FTP STOU 协议方法。      public const string UploadFileWithUniqueName = "STOU";    }    // 摘要:    //   表示可与 HTTP 请求一起使用的 HTTP 协议方法的类型。    public static class Http    {      // 摘要:      //   表示与代理一起使用的 HTTP CONNECT 协议方法，该代理可以动态切换到隧道，如 SSL 隧道的情况。      public const string Connect = "CONNECT";      //      // 摘要:      //   表示一个 HTTP GET 协议方法。      public const string Get = "GET";      //      // 摘要:      //   表示一个 HTTP HEAD 协议方法。除了服务器在响应中只返回消息头不返回消息体以外，HEAD 方法和 GET 是一样的。      public const string Head = "HEAD";      //      // 摘要:      //   表示一个 HTTP MKCOL 请求，该请求在请求 URI（统一资源标识符）指定的位置新建集合，如页的集合。      public const string MkCol = "MKCOL";      //      // 摘要:      //   表示一个 HTTP POST 协议方法，该方法用于将新实体作为补充发送到某个 URI。      public const string Post = "POST";      //      // 摘要:      //   表示一个 HTTP PUT 协议方法，该方法用于替换 URI 标识的实体。      public const string Put = "PUT";    }  }}