Ftp文件操作

public class FtpClient
    {
        private string host;
        private string user;
        private string password;
        private string path;
        private string uri;

        /// <summary>
        /// 连接FTP
        /// </summary>
        /// <param name="host">FTP连接地址</param>
        /// <param name="user">用户名</param>
        /// <param name="password">密码</param>
        /// <param name="path">指定FTP连接成功后的当前目录, 如果不指定即默认为根目录</param>
        public FtpClient(string host, string user, string password, string path = null)
        {
            this.host = host;
            this.user = user;
            this.password = password;
            this.uri = "ftp://" + host + "/";
            if (path != null) this.uri += path + "/";
            this.path = path;
        }

        /// <summary>
        /// 上传
        /// </summary>
        /// <param name="filename"></param>
        public void upload(string filename)
        {
            FileInfo fileInf = new FileInfo(filename);
            string uri = this.uri + fileInf.Name;
            FtpWebRequest reqFTP;

            reqFTP = (FtpWebRequest)FtpWebRequest.Create(new Uri(uri));
            reqFTP.Credentials = new NetworkCredential(user, password);
            reqFTP.KeepAlive = false;
            reqFTP.Method = WebRequestMethods.Ftp.UploadFile;
            reqFTP.UseBinary = true;
            reqFTP.ContentLength = fileInf.Length;
            int buffLength = 2048;
            byte[] buff = new byte[buffLength];
            int contentLen;
            FileStream fs = fileInf.OpenRead();
            try {
                Stream strm = reqFTP.GetRequestStream();
                contentLen = fs.Read(buff, 0, buffLength);
                while (contentLen != 0) {
                    strm.Write(buff, 0, contentLen);
                    contentLen = fs.Read(buff, 0, buffLength);
                }
                strm.Close();
                fs.Close();
            } catch (Exception ex) {
                throw new Exception(ex.Message);
            }
        }

        /// <summary>
        /// 下载
        /// </summary>
        /// <param name="remoteUri">远程路径和名称</param>
        /// <param name="localUri">本地路径和名称</param>
        public void download(string remoteUri, string localUri)
        {
            try {
                var outputStream = new FileStream(localUri, FileMode.Create);

                var ftp = (FtpWebRequest)FtpWebRequest.Create(new Uri(this.uri + remoteUri));
                ftp.Method = WebRequestMethods.Ftp.DownloadFile;
                ftp.UseBinary = true;
                ftp.Credentials = new NetworkCredential(this.user, this.password);

                var response = (FtpWebResponse)ftp.GetResponse();
                var ftpStream = response.GetResponseStream();
                long cl = response.ContentLength;
                int bufferSize = 2048;
                int readCount;
                byte[] buffer = new byte[bufferSize];

                readCount = ftpStream.Read(buffer, 0, bufferSize);
                while (readCount > 0) {
                    outputStream.Write(buffer, 0, readCount);
                    readCount = ftpStream.Read(buffer, 0, bufferSize);
                }

                ftpStream.Close();
                outputStream.Close();
                response.Close();
            } catch (Exception ex) {
                throw ex;
            }
        }


        /// <summary>
        /// 删除文件
        /// </summary>
        /// <param name="remoteUri">远程路径和名称</param>
        public void delete(string remoteUri)
        {
            try {
                var ftp = (FtpWebRequest)FtpWebRequest.Create(new Uri(this.uri + remoteUri));
                ftp.Credentials = new NetworkCredential(user, password);
                ftp.KeepAlive = false;
                ftp.Method = WebRequestMethods.Ftp.DeleteFile;

                string result = String.Empty;
                var response = (FtpWebResponse)ftp.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;
            }
        }

        /// <summary>
        /// 删除文件夹
        /// </summary>
        /// <param name="folderName"></param>
        public void RemoveDirectory(string folderName)
        {
            try {
                string uri = this.uri + folderName;
                FtpWebRequest reqFTP;
                reqFTP = (FtpWebRequest)FtpWebRequest.Create(new Uri(uri));

                reqFTP.Credentials = new NetworkCredential(user, password);
                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 new Exception(ex.Message);
            }
        }

        /// <summary>
        /// 获取当前目录下明细(包含文件和文件夹)
        /// </summary>
        /// <returns></returns>
        public string[] getFilesDetailList()
        {
            try {
                StringBuilder result = new StringBuilder();
                FtpWebRequest ftp;
                ftp = (FtpWebRequest)FtpWebRequest.Create(new Uri(uri));
                ftp.Credentials = new NetworkCredential(user, password);
                ftp.Method = WebRequestMethods.Ftp.ListDirectoryDetails;
                WebResponse response = ftp.GetResponse();
                StreamReader reader = new StreamReader(response.GetResponseStream(), Encoding.Default);

                //while (reader.Read() > 0)
                //{

                //}
                string line = reader.ReadLine();
                //line = reader.ReadLine();
                //line = reader.ReadLine();

                while (line != null) {
                    result.Append(line);
                    result.Append("
");
                    line = reader.ReadLine();
                }
                result.Remove(result.ToString().LastIndexOf("
"), 1);
                reader.Close();
                response.Close();
                return result.ToString().Split('
');
            } catch (Exception ex) {
                throw ex;
            }
        }

        /// <summary>
        /// 获取当前目录下文件列表(仅文件)
        /// </summary>
        /// <returns></returns>
        public string[] getFiles(string remoteUri = "")
        {
            try {
                var ftp = (FtpWebRequest)FtpWebRequest.Create(new Uri(this.uri + remoteUri));
                ftp.UseBinary = true;
                ftp.Credentials = new NetworkCredential(user, password);
                ftp.Method = WebRequestMethods.Ftp.ListDirectoryDetails;
                WebResponse response = ftp.GetResponse();
                StreamReader reader = new StreamReader(response.GetResponseStream(), Encoding.Default);

                var result = new StringBuilder();
                reader.ReadLine();
                string line = reader.ReadLine();
                while (line != null) {
                    if (line.Length > 0) result.Append(line.Substring(line.LastIndexOf(' ') + 1)).Append("
");
                    line = reader.ReadLine();
                }
                reader.Close();
                response.Close();
                if (result.Length > 0) {                    
                    result.Remove(result.ToString().LastIndexOf('
'), 1);
                    return result.ToString().Split('
');
                } else { 
                    return new string[]{};
                }

            } catch (Exception ex) {
                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 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() + "
";
                } 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 + "
";
                    }
                }
            }

            char[] n = new char[] { '
' };
            return m.Split(n);
        }

        /// <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)
        {
            string[] dirList = GetDirectoryList();
            foreach (string str in dirList) {
                if (str.Trim() == RemoteDirectoryName.Trim()) {
                    return true;
                }
            }
            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 = getFiles();
            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(uri + dirName));
                reqFTP.Method = WebRequestMethods.Ftp.MakeDirectory;
                reqFTP.UseBinary = true;
                reqFTP.Credentials = new NetworkCredential(user, password);
                FtpWebResponse response = (FtpWebResponse)reqFTP.GetResponse();
                Stream ftpStream = response.GetResponseStream();

                ftpStream.Close();
                response.Close();
            } catch (Exception ex) {
                throw new Exception(ex.Message);
            }
        }

        /// <summary>
        /// 获取指定文件大小
        /// </summary>
        /// <param name="filename"></param>
        /// <returns></returns>
        public long GetFileSize(string filename)
        {
            FtpWebRequest reqFTP;
            long fileSize = 0;
            try {
                reqFTP = (FtpWebRequest)FtpWebRequest.Create(new Uri(uri + filename));
                reqFTP.Method = WebRequestMethods.Ftp.GetFileSize;
                reqFTP.UseBinary = true;
                reqFTP.Credentials = new NetworkCredential(user, password);
                FtpWebResponse response = (FtpWebResponse)reqFTP.GetResponse();
                Stream ftpStream = response.GetResponseStream();
                fileSize = response.ContentLength;

                ftpStream.Close();
                response.Close();
            } catch (Exception ex) {
                throw new Exception(ex.Message);
            }
            return fileSize;
        }

        /// <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(uri + currentFilename));
                reqFTP.Method = WebRequestMethods.Ftp.Rename;
                reqFTP.RenameTo = newFilename;
                reqFTP.UseBinary = true;
                reqFTP.Credentials = new NetworkCredential(user, password);
                FtpWebResponse response = (FtpWebResponse)reqFTP.GetResponse();
                Stream ftpStream = response.GetResponseStream();

                ftpStream.Close();
                response.Close();
            } catch (Exception ex) {
                throw new Exception(ex.Message);
            }
        }

        /// <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) {
                path = DirectoryName;
            } else {
                path += DirectoryName + "/";
            }
            uri = "ftp://" + host + "/" + path + "/";
        }

        /// <summary>
        /// 删除订单目录
        /// </summary>
        /// <param name="host">FTP 主机地址</param>
        /// <param name="folderToDelete">FTP 用户名</param>
        /// <param name="user">FTP 用户名</param>
        /// <param name="password">FTP 密码</param>
        public static void DeleteOrderDirectory(string host, string folderToDelete, string user, string password)
        {
            try {
                if (!string.IsNullOrEmpty(host) && !string.IsNullOrEmpty(folderToDelete) && !string.IsNullOrEmpty(user) && !string.IsNullOrEmpty(password)) {
                    FtpClient fw = new FtpClient(host, folderToDelete, user, password);
                    //进入订单目录
                    fw.GotoDirectory(folderToDelete, true);
                    //获取规格目录
                    string[] folders = fw.GetDirectoryList();
                    foreach (string folder in folders) {
                        if (!string.IsNullOrEmpty(folder) || folder != "") {
                            //进入订单目录
                            string subFolder = folderToDelete + "/" + folder;
                            fw.GotoDirectory(subFolder, true);
                            //获取文件列表
                            string[] files = fw.getFiles();
                            if (files != null) {
                                //删除文件
                                foreach (string file in files) {
                                    fw.delete(file);
                                }
                            }
                            //删除冲印规格文件夹
                            fw.GotoDirectory(folderToDelete, true);
                            fw.RemoveDirectory(folder);
                        }
                    }

                    //删除订单文件夹
                    string parentFolder = folderToDelete.Remove(folderToDelete.LastIndexOf('/'));
                    string orderFolder = folderToDelete.Substring(folderToDelete.LastIndexOf('/') + 1);
                    fw.GotoDirectory(parentFolder, true);
                    fw.RemoveDirectory(orderFolder);
                } else {
                    throw new Exception("FTP 及路径不能为空！");
                }
            } catch (Exception ex) {
                throw new Exception("删除订单时发生错误，错误信息为：" + ex.Message);
            }
        }
    }