public class FtpTools    {        static readonly string ftpServerIP = ConfigurationManager.AppSettings["FtpAddress"];        static readonly string ftpUserID = ConfigurationManager.AppSettings["FtpUserName"];        static readonly string ftpPassword = ConfigurationManager.AppSettings["FtpPassword"];        static readonly string headPath = ConfigurationManager.AppSettings["FileUploadDir"];        /// <summary>        /// 连接ftp        /// </summary>        /// <param name="path"></param>        private static FtpWebRequest Connect(String path)        {            // 根据uri创建FtpWebRequest对象            FtpWebRequest reqFTP = (FtpWebRequest)FtpWebRequest.Create(new Uri(ftpServerIP + path));            // 指定数据传输类型            reqFTP.UseBinary = true;            reqFTP.UsePassive = false;            // ftp用户名和密码            SecureString sPassword = new SecureString();            foreach (var p in ftpPassword)            {                sPassword.AppendChar(p);            }            reqFTP.Credentials = new NetworkCredential(ftpUserID, sPassword);            return reqFTP;        }        /// <summary>        /// 创建目录        /// </summary>        /// <param name="dirName"></param>        private static void MakeDir(string dirName)        {            var dirNameList = dirName.Split(‘/‘);            string nowDirName = "";            for (int i = 0; i < dirNameList.Length; i++)            {                if (string.IsNullOrEmpty(dirNameList[i]))                {                    return;                }                if (i == 0)                {                    nowDirName += dirNameList[i];                }                else                {                    nowDirName += "/" + dirNameList[i];                }                if (!DirectoryExist(nowDirName))                {                    FtpWebRequest reqFTP = Connect(nowDirName);//连接                    reqFTP.Method = WebRequestMethods.Ftp.MakeDirectory;                    FtpWebResponse response = (FtpWebResponse)reqFTP.GetResponse();                    response.Close();                    reqFTP.Abort();                }            }        }        /// <summary>        /// 目录是否存在(根目录必须有)        /// </summary>        /// <param name="dirName"></param>        /// <returns></returns>        public static bool DirectoryExist(string dirName)        {            bool result = false;            try            {                if (!dirName.Contains("/"))                {                    return true;                }                if (dirName[dirName.Length - 1] == ‘/‘)                {                    dirName = dirName.Remove(dirName.Length - 1);                }                var array = dirName.Split(‘/‘);                var nowDirName = array[array.Length - 1];                var rootDir = string.Join("/", array.Take(array.Length - 1));                FtpWebRequest reqFTP = Connect(rootDir);//连接                //指定FTP操作类型为创建目录                reqFTP.Method = WebRequestMethods.Ftp.ListDirectoryDetails;                //获取FTP服务器的响应                FtpWebResponse response = (FtpWebResponse)reqFTP.GetResponse();                StreamReader sr = new StreamReader(response.GetResponseStream(), Encoding.Default);                StringBuilder streamStr = new StringBuilder();                string line = "";                while (true)                {                    line = sr.ReadLine();                    if (line == null)                    {                        break;                    }                    line = line.Remove(0, line.IndexOf("<DIR>") + 5).Trim();                    if (nowDirName == line)                    {                        result = true;                    }                }                response.Close();                reqFTP.Abort();            }            catch            {                return false;            }            return result;        }        /// <summary>        /// 检查文件是否存在        /// </summary>        /// <param name="ftpPath"></param>        /// <param name="ftpName"></param>        /// <returns></returns>        public static bool fileCheckExist(string ftpPath, string ftpName)        {            bool success = false;            FtpWebResponse webResponse = null;            StreamReader reader = null;            try            {                FtpWebRequest ftpWebRequest = Connect(ftpPath);//连接;                ftpWebRequest.Method = WebRequestMethods.Ftp.ListDirectory ;                ftpWebRequest.KeepAlive = false;                ftpWebRequest.Proxy = null;                 webResponse = (FtpWebResponse)ftpWebRequest.GetResponse();                if (webResponse != null)                {                    reader = new StreamReader(webResponse.GetResponseStream(), Encoding.Default);                    string line = reader.ReadLine();                    while (line != null)                    {                        if (line == ftpName)                        {                            success = true;                            break;                        }                        line = reader.ReadLine();                    }                }            }            catch (Exception)            {                success = false;            }            finally            {                if (reader != null)                {                    reader.Close();                }                if (webResponse != null)                {                    webResponse.Close();                }            }            return success;        }        /// <summary>        /// ftp上传        /// </summary>        /// <param name="stream"></param>        /// <param name="dirName"></param>        /// <param name="fileFullName"></param>        public static void Upload(string dirName, string fileFullName, byte[] FileData)        {            if (!DirectoryExist(dirName))            {                MakeDir(dirName);            }            FtpWebRequest reqFTP = Connect(fileFullName);//连接            reqFTP.Proxy = null;            // 默认为true，连接不会被关闭            // 在一个命令之后被执行            reqFTP.KeepAlive = false;            // 指定执行下载            reqFTP.Method = WebRequestMethods.Ftp.UploadFile;            // 上传文件时通知服务器文件的大小            reqFTP.ContentLength = FileData.Length;            // 把上传的文件写入流            Stream strm = reqFTP.GetRequestStream();            strm.Write(FileData, 0, FileData.Length);            strm.Close();            reqFTP.Abort();        }        /// <summary>        /// ftp下载        /// </summary>        /// <param name="fullFileName"></param>        public static byte[] Download(string fullFileName)        {            FtpWebRequest reqFTP = Connect(fullFileName);//连接            reqFTP.Method = WebRequestMethods.Ftp.DownloadFile;            FtpWebResponse response = (FtpWebResponse)reqFTP.GetResponse();            Stream ftpStream = response.GetResponseStream();            int bufferSize = 2048;            int readCount = 0;            int length = 0;            List<byte> tmpResult = new List<byte>();            byte[] result = new byte[0];            byte[] buffer = new byte[bufferSize];            try            {                MemoryStream ms = new MemoryStream();                readCount = ftpStream.Read(buffer, 0, bufferSize);                tmpResult.AddRange(buffer);                length += readCount;                while (readCount > 0)                {                    ms.Write(buffer, 0, readCount);                    readCount = ftpStream.Read(buffer, 0, bufferSize);                    tmpResult.AddRange(buffer);                }                ms.Flush();                ms.Close();                ftpStream.Close();                response.Close();                reqFTP.Abort();                result = ms.ToArray();            }            catch { throw; }            finally {                 //FileTools.DelFile(tmpPath);            }            return result;        }        /// <summary>          /// 删除文件        /// </summary>          /// <param name="Path">文件路径</param>         public static void DelFile(string Path)        {            FtpWebRequest reqFTP = Connect(Path);//连接            reqFTP.Method = WebRequestMethods.Ftp.DeleteFile;            reqFTP.GetResponse();            reqFTP.Abort();        }