FTP 上传下载 进度条

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        /// <summary>
        /// 文件上传
        /// </summary>
        /// <param name="filePath">原路径（绝对路径）包括文件名</param>
        /// <param name="objPath">目标文件夹：服务器下的相对路径 不填为根目录</param>
        public static bool FileUpLoad(string filePath, string objPath = "")
        {
            bool isOk = false;
            string url = path;
            if (objPath != "")
                url += objPath + "/";
            FtpWebRequest reqFTP = null;
            ProgressBarForm progressBarForm = null;
            try
            {
                FileInfo fileInfo = new FileInfo(filePath);
                reqFTP = getFtpWebRequest(url, fileInfo.Name);
                progressBarForm = new ProgressBarForm();
                progressBarForm.Show();
                using (FileStream fs = fileInfo.OpenRead())
                using (Stream stream = reqFTP.GetRequestStream())
                {
                    int buff = 1024 * 1024;
                    byte[] b = new byte[buff];
                    int count = 1;
                    double total = Math.Ceiling(fs.Length / (float)buff);
                    int len;
                    while ((len = fs.Read(b, 0, b.Length)) > 0)
                    {
                        stream.Write(b, 0, len);
                        progressBarForm.LoadProgressBarRate(count++, (float)total);
                    }
                }

                isOk = true;
            }
            catch (Exception ex)
            {
                Logger.Error(ex);
            }
            finally
            {
                if (progressBarForm != null)
                    progressBarForm.Close();
            }
            return isOk;
        }

        private static FtpWebRequest getFtpWebRequest(string url, string fileInfoName)
        {
            string requestUri = url + fileInfoName;
            FtpWebRequest reqFTP = (FtpWebRequest)FtpWebRequest.Create(new Uri(requestUri));
            reqFTP.Credentials = new NetworkCredential(username, password);     //设置连接到FTP的帐号密码
            reqFTP.KeepAlive = false;       //设置请求完成后是否保持连接
            reqFTP.Method = WebRequestMethods.Ftp.UploadFile;       //指定执行命令
            reqFTP.UseBinary = true;        //指定数据传输类型
            return reqFTP;
        }

        public void Download(string remoteFile, string localFile)
        {
            ProgressBarForm progressBarForm = null;
            try
            {
                ftpRequest = (FtpWebRequest)FtpWebRequest.Create(path + "/" + remoteFile);
                ftpRequest.Credentials = new NetworkCredential(username, password);
                ftpRequest.UseBinary = true;
                ftpRequest.UsePassive = true;
                ftpRequest.KeepAlive = true;
                ftpRequest.Method = WebRequestMethods.Ftp.DownloadFile;
                ftpResponse = (FtpWebResponse)ftpRequest.GetResponse();
                ftpStream = ftpResponse.GetResponseStream();

                long serverFileSize = GetFileSize(remoteFile);
                FileStream localFileStream = new FileStream(localFile, FileMode.Create);
                byte[] byteBuffer = new byte[bufferSize];
                progressBarForm = new ProgressBarForm();
                progressBarForm.Show();
                int len;
                while ((len = ftpStream.Read(byteBuffer, 0, byteBuffer.Length)) > 0)
                {
                    localFileStream.Write(byteBuffer, 0, len);
                    var current = (localFileStream.Length * 1.0d / serverFileSize) * 100;
                    progressBarForm.LoadProgressBarRate((int)current, 100);
                }
                localFileStream.Close();
                ftpStream.Close();
                ftpResponse.Close();
                ftpRequest = null;
            }
            catch (Exception ex)
            {
                Logger.Error(ex);
                Console.WriteLine(ex.ToString());
            }
            finally
            {
                if (progressBarForm != null)
                    progressBarForm.Close();
            }
        }