using System; using System.Collections.Generic; using System.Net; using System.IO; namespace FTP操作 {
   ///
 /// FTP客户端操作类 ///
     public class FtpClient     {
   #region 构造函数 ///
 /// 创建FTP工具 ///
      
        /// 默认不使用SSL,使用二进制传输方式,使用被动模式 ///
       ///
 ///主机名称 ///用户名 ///密码         public FtpClient(string host, string userId, string password)             : this(host, userId, password, 21, null, false, true, true)         {
           } ///
 /// 创建FTP工具 ///
 ///主机名称 ///用户名 ///密码 ///端口 ///允许Ssl ///代理 ///允许二进制 ///允许被动模式         public FtpClient(string host, string userId, string password, int port, IWebProxy proxy, bool enableSsl, bool useBinary, bool usePassive)         {
   this.userId = userId; this.password = password; if (host.ToLower().StartsWith("ftp://"))             {
   this.host = host;             } else             {
   this.host = "ftp://" + host;             } this.port = port; this.proxy = proxy; this.enableSsl = enableSsl; this.useBinary = useBinary; this.usePassive = usePassive;         } #endregion #region 主机 private string host = string.Empty; ///
 /// 主机 ///
         public string Host         {
   get             {
   return this.host ?? string.Empty;             }         } #endregion #region 登录用户名 private string userId = string.Empty; ///
 /// 登录用户名 ///
         public string UserId         {
   get             {
   return this.userId;             }         } #endregion #region 密码 private string password = string.Empty; ///
 /// 密码 ///
         public string Password         {
   get             {
   return this.password;             }         } #endregion #region 代理         IWebProxy proxy = null; ///
 /// 代理 ///
         public IWebProxy Proxy         {
   get             {
   return this.proxy;             } set             {
   this.proxy = value;             }         } #endregion #region 端口 private int port = 21; ///
 /// 端口 ///
         public int Port         {
   get             {
   return port;             } set             {
   this.port = value;             }         } #endregion #region 设置是否允许Ssl private bool enableSsl = false; ///
 /// EnableSsl ///
         public bool EnableSsl         {
   get             {
   return enableSsl;             }         } #endregion #region 使用被动模式 private bool usePassive = true; ///
 /// 被动模式 ///
         public bool UsePassive         {
   get             {
   return usePassive;             } set             {
   this.usePassive = value;             }         } #endregion #region 二进制方式 private bool useBinary = true; ///
 /// 二进制方式 ///
         public bool UseBinary         {
   get             {
   return useBinary;             } set             {
   this.useBinary = value;             }         } #endregion #region 远端路径 private string remotePath = "/"; ///
 /// 远端路径 ///
      
        ///     返回FTP服务器上的当前路径(可以是 / 或 /a/../ 的形式) ///
       ///
         public string RemotePath         {
   get             {
   return remotePath;             } set             {
   string result = "/"; if (!string.IsNullOrEmpty(value) && value != "/")                 {
                       result = "/" + value.TrimStart('/').TrimEnd('/') + "/";                 } this.remotePath = result;             }         } #endregion #region 创建一个FTP连接 ///
 /// 创建一个FTP请求 ///
 ///请求地址 ///请求方法 ///
     
      FTP请求
              private FtpWebRequest CreateRequest(string url, string method)         {
   //建立连接             FtpWebRequest request = (FtpWebRequest)WebRequest.Create(url);             request.Credentials = new NetworkCredential(this.userId, this.password);             request.Proxy = this.proxy;             request.KeepAlive = false;//命令执行完毕之后关闭连接             request.UseBinary = useBinary;             request.UsePassive = usePassive;             request.EnableSsl = enableSsl;             request.Method = method; return request;         } #endregion #region 上传一个文件到远端路径下 ///
 /// 把文件上传到FTP服务器的RemotePath下 ///
 ///本地文件信息 ///要保存到FTP文件服务器上的名称         public bool Upload(FileInfo localFile, string remoteFileName)         {
   bool result = false; if (localFile.Exists)             {
   string url = Host.TrimEnd('/') + RemotePath + remoteFileName;                 FtpWebRequest request = CreateRequest(url, WebRequestMethods.Ftp.UploadFile); //上传数据                 using (Stream rs = request.GetRequestStream()) using (FileStream fs = localFile.OpenRead())                 {
   byte[] buffer = new byte[4096];//4K                     int count = fs.Read(buffer, 0, buffer.Length); while (count > 0)                     {
                           rs.Write(buffer, 0, count);                         count = fs.Read(buffer, 0, buffer.Length);                     }                     fs.Close();                     result = true;                 } return result;             } throw new Exception(string.Format("本地文件不存在,文件路径:{0}", localFile.FullName));         } #endregion #region 从FTP服务器上下载文件 ///
 /// 从当前目录下下载文件 ///
      
        /// 如果本地文件存在,则从本地文件结束的位置开始下载. ///
       ///
 ///服务器上的文件名称 ///本地文件名称 ///
     
      返回一个值,指示是否下载成功
              public bool Download(string serverName, string localName)         {
   bool result = false; using (FileStream fs = new FileStream(localName, FileMode.OpenOrCreate)) //创建或打开本地文件             {
   //建立连接                 string url = Host.TrimEnd('/') + RemotePath + serverName;                 FtpWebRequest request = CreateRequest(url, WebRequestMethods.Ftp.DownloadFile);                 request.ContentOffset = fs.Length; using (FtpWebResponse response = (FtpWebResponse)request.GetResponse())                 {
                       fs.Position = fs.Length; byte[] buffer = new byte[4096];//4K                     int count = response.GetResponseStream().Read(buffer, 0, buffer.Length); while (count > 0)                     {
                           fs.Write(buffer, 0, count);                         count = response.GetResponseStream().Read(buffer, 0, buffer.Length);                     }                     response.GetResponseStream().Close();                 }                 result = true;             } return result;         } #endregion #region 重命名FTP服务器上的文件 ///
 /// 文件更名 ///
 ///原文件名 ///新文件名 ///
     
      返回一个值,指示更名是否成功
              public bool Rename(string oldFileName, string newFileName)         {
   bool result = false; //建立连接             string url = Host.TrimEnd('/') + RemotePath + oldFileName;             FtpWebRequest request = CreateRequest(url, WebRequestMethods.Ftp.Rename);             request.RenameTo = newFileName; using (FtpWebResponse response = (FtpWebResponse)request.GetResponse())             {
                   result = true;             } return result;         } #endregion #region 从当前目录下获取文件列表 ///
 /// 获取当前目录下文件列表 ///
 ///
              public List
     
       GetFileList()         {
               List
      
        result = new List
       
        (); //建立连接             string url = Host.TrimEnd('/') + RemotePath;             FtpWebRequest request = CreateRequest(url, WebRequestMethods.Ftp.ListDirectory); using (FtpWebResponse response = (FtpWebResponse)request.GetResponse())             {
                   StreamReader reader = new StreamReader(response.GetResponseStream(), System.Text.Encoding.Default);//中文文件名                 string line = reader.ReadLine(); while (line != null)                 {
                       result.Add(line);                     line = reader.ReadLine();                 }             } return result;         } #endregion #region 从FTP服务器上获取文件和文件夹列表 ///
        
 /// 获取详细列表 ///
 ///
                 public List
        
          GetFileDetails()         {
               List
         
           result = new List
          
           (); //建立连接 string url = Host.TrimEnd('/') + RemotePath; FtpWebRequest request = CreateRequest(url, WebRequestMethods.Ftp.ListDirectoryDetails); using (FtpWebResponse response = (FtpWebResponse)request.GetResponse()) { StreamReader reader = new StreamReader(response.GetResponseStream(), System.Text.Encoding.Default);//中文文件名 string line = reader.ReadLine(); while (line != null) { result.Add(line); line = reader.ReadLine(); } } return result; } #endregion #region 从FTP服务器上删除文件 ///
           
 /// 删除FTP服务器上的文件 ///
 ///
           文件名称 ///
           
            返回一个值,指示是否删除成功
            public bool DeleteFile(string fileName) { bool result = false; //建立连接 string url = Host.TrimEnd('/') + RemotePath + fileName; FtpWebRequest request = CreateRequest(url, WebRequestMethods.Ftp.DeleteFile); using (FtpWebResponse response = (FtpWebResponse)request.GetResponse()) { result = true; } return result; } #endregion #region 在FTP服务器上创建目录 ///
           
 /// 在当前目录下创建文件夹 ///
 ///
           文件夹名称 ///
           
            返回一个值,指示是否创建成功
            public bool MakeDirectory(string dirName) { bool result = false; //建立连接 string url = Host.TrimEnd('/') + RemotePath + dirName; FtpWebRequest request = CreateRequest(url, WebRequestMethods.Ftp.MakeDirectory); using (FtpWebResponse response = (FtpWebResponse)request.GetResponse()) { result = true; } return result; } #endregion #region 从FTP服务器上删除目录 ///
           
 /// 删除文件夹 ///
 ///
           文件夹名称 ///
           
            返回一个值,指示是否删除成功
            public bool DeleteDirectory(string dirName) { bool result = false; //建立连接 string url = Host.TrimEnd('/') + RemotePath + dirName; FtpWebRequest request = CreateRequest(url, WebRequestMethods.Ftp.RemoveDirectory); using (FtpWebResponse response = (FtpWebResponse)request.GetResponse()) { result = true; } return result; } #endregion #region 从FTP服务器上获取文件大小 ///
           
 /// 获取文件大小 ///
 ///
            ///
            public long GetFileSize(string fileName) { long result = 0; //建立连接 string url = Host.TrimEnd('/') + RemotePath + fileName; FtpWebRequest request = CreateRequest(url, WebRequestMethods.Ftp.GetFileSize); using (FtpWebResponse response = (FtpWebResponse)request.GetResponse()) { result = response.ContentLength; } return result; } #endregion #region 给FTP服务器上的文件追加内容 ///
           
 /// 给FTP服务器上的文件追加内容 ///
 ///
           本地文件 ///
           FTP服务器上的文件 ///
           
            返回一个值,指示是否追加成功
            public bool Append(FileInfo localFile, string remoteFileName) { if (localFile.Exists) { using (FileStream fs = new FileStream(localFile.FullName, FileMode.Open)) { return Append(fs, remoteFileName); } } throw new Exception(string.Format("本地文件不存在,文件路径:{0}", localFile.FullName)); } ///
           
 /// 给FTP服务器上的文件追加内容 ///
 ///
           数据流(可通过设置偏移来实现从特定位置开始上传) ///
           FTP服务器上的文件 ///
           
            返回一个值,指示是否追加成功
            public bool Append(Stream stream, string remoteFileName) { bool result = false; if (stream != null && stream.CanRead) { //建立连接 string url = Host.TrimEnd('/') + RemotePath + remoteFileName; FtpWebRequest request = CreateRequest(url, WebRequestMethods.Ftp.AppendFile); using (Stream rs = request.GetRequestStream()) { //上传数据 byte[] buffer = new byte[4096];//4K int count = stream.Read(buffer, 0, buffer.Length); while (count > 0) { rs.Write(buffer, 0, count); count = stream.Read(buffer, 0, buffer.Length); } result = true; } } return result; } #endregion #region 获取FTP服务器上的当前路径 ///
           
 /// 获取FTP服务器上的当前路径 ///
 public string CurrentDirectory { get { string result = string.Empty; string url = Host.TrimEnd('/') + RemotePath; FtpWebRequest request = CreateRequest(url, WebRequestMethods.Ftp.PrintWorkingDirectory); using (FtpWebResponse response = (FtpWebResponse)request.GetResponse()) { string temp = response.StatusDescription; int start = temp.IndexOf('"') + 1; int end = temp.LastIndexOf('"'); if (end >= start) { result = temp.Substring(start, end - start); } } return result; } } #endregion #region 检查当前路径上是否存在某个文件 ///
           
 /// 检查文件是否存在 ///
 ///
           要检查的文件名 ///
           
            返回一个值,指示要检查的文件是否存在
            public bool CheckFileExist(string fileName) { bool result = false; if (fileName != null && fileName.Trim().Length > 0) { fileName = fileName.Trim(); List
           
             files = GetFileList(); if (files != null && files.Count > 0) { foreach (string file in files) { if (file.ToLower() == fileName.ToLower()) { result = true; break; } } } } return result; } #endregion } }