//基本設置
        private static string ftppath = @"ftp://" + "192.168.1.1" + "/";    //目標路徑
        private static string ftpip = "192.168.1.1";    //ftp IP地址
        private static string username = "username";   //ftp用戶名
        private static string password = "password";   //ftp密碼

        //獲取ftp上面的文件和文件夾
 

        public static string[] GetFileList(string dir)
        {
            string[] downloadFiles;
            StringBuilder result = new StringBuilder();
            FtpWebRequest request;
            try
            {
                request = (FtpWebRequest)FtpWebRequest.Create(new Uri(ftppath));
                request.UseBinary 
 
= true;
                request.Credentials = new NetworkCredential(username, password);//設置用戶名和密碼
                request.Method = WebRequestMethods.Ftp.ListDirectory;
                request.UseBinary = true;

                WebResponse response = request.GetResponse();
                StreamReader reader 
 
= new StreamReader(response.GetResponseStream());

                string line = reader.ReadLine();
                while (line != null)
                {
                    result.Append(line);
                    result.Append("\n");
                    Console.WriteLine(line);
                    line = reader.ReadLine();
                }
                // to remove the trailing ‘\n‘
                result.Remove(result.ToString().LastIndexOf(‘\n‘), 1);
                reader.Close();
                response.Close();
                return result.ToString().Split(‘\n‘);
            }
            catch (Exception ex)
            {
                Console.WriteLine("獲取ftp上面的文件和文件夾：" + ex.Message);
                downloadFiles = null;
                return downloadFiles;
            }
        }

        /// <summary>
        /// 獲取文件大小
        /// </summary>
        /// <param name="file">ip服務器下的相對路徑</param>
        /// <returns>文件大小</returns>
        public static int GetFileSize(string file)
        {
            StringBuilder result = new StringBuilder();
            FtpWebRequest request;
            try
            {
                request = (FtpWebRequest)FtpWebRequest.Create(new Uri(ftppath + file));
                request.UseBinary = true;
                request.Credentials = new NetworkCredential(username, password);//設置用戶名和密碼
                request.Method = WebRequestMethods.Ftp.GetFileSize;

                int dataLength = (int)request.GetResponse().ContentLength;

                return dataLength;
            }
            catch (Exception ex)
            {
                Console.WriteLine("獲取文件大小出錯：" + ex.Message);
                return -1;
            }
        }

        /// <summary>
        /// 文件上傳
        /// </summary>
        /// <param name="filePath">原路徑（絕對路徑）包括文件名</param>
        /// <param name="objPath">目標文件夾：服務器下的相對路徑 不填為根目錄</param>
        public static void FileUpLoad(string filePath, string objPath = "")
        {
            try
            {
                string url = ftppath;
                if (objPath != "")
                    url += objPath + "/";
                try
                {

                    FtpWebRequest reqFTP = null;
                    //待上傳的文件 （全路徑）
                    try
                    {
                        FileInfo fileInfo = new FileInfo(filePath);
                        using (FileStream fs = fileInfo.OpenRead())
                        {
                            long length = fs.Length;
                            reqFTP = (FtpWebRequest)FtpWebRequest.Create(new Uri(url + fileInfo.Name));

                            //設置連接到FTP的帳號密碼
                            reqFTP.Credentials = new NetworkCredential(username, password);
                            //設置請求完成後是否保持連接
                            reqFTP.KeepAlive = false;
                            //指定執行命令
                            reqFTP.Method = WebRequestMethods.Ftp.UploadFile;
                            //指定數據傳輸類型
                            reqFTP.UseBinary = true;

                            using (Stream stream = reqFTP.GetRequestStream())
                            {
                                //設置緩沖大小
                                int BufferLength = 5120;
                                byte[] b = new byte[BufferLength];
                                int i;
                                while ((i = fs.Read(b, 0, BufferLength)) > 0)
                                {
                                    stream.Write(b, 0, i);
                                }
                                Console.WriteLine("上傳文件成功");
                            }
                        }
                    }
                    catch (Exception ex)
                    {
                        Console.WriteLine("上傳文件失敗錯誤為" + ex.Message);
                    }
                    finally
                    {

                    }
                }
                catch (Exception ex)
                {
                    Console.WriteLine("上傳文件失敗錯誤為" + ex.Message);
                }
                finally
                {

                }
            }
            catch (Exception ex)
            {
                Console.WriteLine("上傳文件失敗錯誤為" + ex.Message);
            }
        }

        /// <summary>
        /// 刪除文件
        /// </summary>
        /// <param name="fileName">服務器下的相對路徑 包括文件名</param>
        public static void DeleteFileName(string fileName)
        {
            try
            {
                FileInfo fileInf = new FileInfo(ftpip + "" + fileName);
                string uri = ftppath + fileName;
                FtpWebRequest reqFTP = (FtpWebRequest)FtpWebRequest.Create(new Uri(uri));
                // 指定數據傳輸類型
                reqFTP.UseBinary = true;
                // ftp用戶名和密碼
                reqFTP.Credentials = new NetworkCredential(username, password);
                // 默認為true，連接不會被關閉
                // 在一個命令之後被執行
                reqFTP.KeepAlive = false;
                // 指定執行什麽命令
                reqFTP.Method = WebRequestMethods.Ftp.DeleteFile;
                FtpWebResponse response = (FtpWebResponse)reqFTP.GetResponse();
                response.Close();
            }
            catch (Exception ex)
            {
                Console.WriteLine("刪除文件出錯：" + ex.Message);
            }
        }

        /// <summary>
        /// 新建目錄 上一級必須先存在
        /// </summary>
        /// <param name="dirName">服務器下的相對路徑</param>
        public static void MakeDir(string dirName)
        {
            try
            {
                string uri = ftppath + dirName;
                FtpWebRequest reqFTP = (FtpWebRequest)FtpWebRequest.Create(new Uri(uri));
                // 指定數據傳輸類型
                reqFTP.UseBinary = true;
                // ftp用戶名和密碼
                reqFTP.Credentials = new NetworkCredential(username, password);
                reqFTP.Method = WebRequestMethods.Ftp.MakeDirectory;
                FtpWebResponse response = (FtpWebResponse)reqFTP.GetResponse();
                response.Close();
            }
            catch (Exception ex)
            {
                Console.WriteLine("創建目錄出錯：" + ex.Message);
            }
        }

        /// <summary>
        /// 刪除目錄 上一級必須先存在
        /// </summary>
        /// <param name="dirName">服務器下的相對路徑</param>
        public static void DelDir(string dirName)
        {
            try
            {
                string uri = ftppath + dirName;
                FtpWebRequest reqFTP = (FtpWebRequest)FtpWebRequest.Create(new Uri(uri));
                // ftp用戶名和密碼
                reqFTP.Credentials = new NetworkCredential(username, password);
                reqFTP.Method = WebRequestMethods.Ftp.RemoveDirectory;
                FtpWebResponse response = (FtpWebResponse)reqFTP.GetResponse();
                response.Close();
            }
            catch (Exception ex)
            {
                Console.WriteLine("刪除目錄出錯：" + ex.Message);
            }
        }

        /// <summary>
        /// 從ftp服務器上獲得文件夾列表
        /// </summary>
        /// <param name="RequedstPath">服務器下的相對路徑</param>
        /// <returns></returns>
        public static List<string> GetDirctory(string RequedstPath)
        {
            List<string> strs = new List<string>();
            try
            {
                string uri = ftppath + RequedstPath;   //目標路徑 path為服務器地址
                FtpWebRequest reqFTP = (FtpWebRequest)FtpWebRequest.Create(new Uri(uri));
                // ftp用戶名和密碼
                reqFTP.Credentials = new NetworkCredential(username, password);
                reqFTP.Method = WebRequestMethods.Ftp.ListDirectoryDetails;
                WebResponse response = reqFTP.GetResponse();
                StreamReader reader = new StreamReader(response.GetResponseStream());//中文文件名

                string line = reader.ReadLine();
                while (line != null)
                {
                    if (line.Contains("<DIR>"))
                    {
                        string msg = line.Substring(line.LastIndexOf("<DIR>") + 5).Trim();
                        strs.Add(msg);
                    }
                    line = reader.ReadLine();
                }
                reader.Close();
                response.Close();
                return strs;
            }
            catch (Exception ex)
            {
                Console.WriteLine("獲取目錄出錯：" + ex.Message);
            }
            return strs;
        }

        /// <summary>
        /// 從ftp服務器上獲得文件列表
        /// </summary>
        /// <param name="RequedstPath">服務器下的相對路徑</param>
        /// <returns></returns>
        public static List<string> GetFile(string RequedstPath)
        {
            List<string> strs = new List<string>();
            try
            {
                string uri = ftppath + RequedstPath;   //目標路徑 path為服務器地址
                FtpWebRequest reqFTP = (FtpWebRequest)FtpWebRequest.Create(new Uri(uri));
                // ftp用戶名和密碼
                reqFTP.Credentials = new NetworkCredential(username, password);
                reqFTP.Method = WebRequestMethods.Ftp.ListDirectoryDetails;
                WebResponse response = reqFTP.GetResponse();
                StreamReader reader = new StreamReader(response.GetResponseStream());//中文文件名

                string line = reader.ReadLine();
                while (line != null)
                {
                    if (!line.Contains("<DIR>"))
                    {
                        string msg = line.Substring(39).Trim();
                        strs.Add(msg);
                    }
                    line = reader.ReadLine();
                }
                reader.Close();
                response.Close();
                return strs;
            }
            catch (Exception ex)
            {
                Console.WriteLine("獲取文件出錯：" + ex.Message);
            }
            return strs;
        }
        //從ftp服務器上下載文件的功能  
        public void Download(string fileName)
        {
            FtpWebRequest reqFTP;
            try
            {
                string filePath = Application.StartupPath;
                FileStream outputStream = new FileStream(filePath + "\\" + fileName, FileMode.Create);
                reqFTP = (FtpWebRequest)FtpWebRequest.Create(new Uri(ftppath + fileName));
                reqFTP.Method = WebRequestMethods.Ftp.DownloadFile;
                reqFTP.UseBinary = true;
                reqFTP.Credentials = new NetworkCredential(username, password);
                reqFTP.UsePassive = false;
                FtpWebResponse response = (FtpWebResponse)reqFTP.GetResponse();
                Stream 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;
            }
        }

FTP服務器FtpHelper類（轉）