SWFUpload插件+FTP文件上传，我这么玩

        /// 

        /// 文件上传
        /// 
        /// 
        public ActionResult FileUpload()
        {
            HttpPostedFileBase file = Request.Files["Filedata"];
            string fileName = Path.GetFileName(file.FileName);
            string fileExt = Path.GetExtension(fileName);int fileSize = file.ContentLength;
            string msg = string.Empty;
            if (fileExt == ".jpg" || fileExt == ".gif" || fileExt == ".flv" || fileExt == ".mp4")
            {
                //从数据库获取FTP地址
                string serverIP = NVP_FTPServerService.LoadData("DepartmentID", LoginUser.DepartmentID.ToString()).FirstOrDefault().FTPServer;
                string userName = System.Configuration.ConfigurationManager.AppSettings["FTPUserName"];
                string password = System.Configuration.ConfigurationManager.AppSettings["FTPPassword"];
                string dir = "/UploadFile/" + DateTime.Now.ToString() + "/" + fileName;
                string localPath = Request.MapPath(dir);
                Directory.CreateDirectory(Path.GetDirectoryName(localPath));
                file.SaveAs(localPath);
                //上传Ftp
                FtpStatusCode ftpCode = FtpUpload(localPath, null, serverIP, userName, password);
                //删除原文件
                System.IO.File.Delete(localPath);
                if (ftpCode == FtpStatusCode.ClosingData)
                {
                    //录入数据库
                    int count = SaveDataInfo(fileSize, fileName);
                    if (count > 0)
                    {
                        msg = "上传成功";
                    }
                    else
                    {
                        msg = "数据库错误，上传文件信息无法显示";
                    }
                }
                else
                {
                    msg = "FTP服务器错误";
                }
            }
            else
            {
                msg = "上传文件类型错误";
            }
            return Content(msg);
        }

 private FtpStatusCode FtpUpload(string sFileDstPath, string FolderName, string ftpServerIP, string ftpUserName, string ftpPwd)
        {
            try
            {
                FileInfo fileInf = new FileInfo(sFileDstPath);
                FtpWebRequest reqFTP;
                FtpWebResponse uploadResponse = null;
                reqFTP = (FtpWebRequest)FtpWebRequest.Create(new Uri(ftpServerIP + "/" + FolderName + "/" + fileInf.Name));
                reqFTP.Credentials = new NetworkCredential(ftpUserName, ftpPwd);
                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;
                using (FileStream fs = fileInf.OpenRead())
                {
                    using (Stream strm = reqFTP.GetRequestStream())
                    {
                        contentLen = fs.Read(buff, 0, buffLength);
                        while (contentLen != 0)
                        {
                            strm.Write(buff, 0, contentLen);
                            contentLen = fs.Read(buff, 0, buffLength);
                        }
                    }
                }
                uploadResponse = (FtpWebResponse)reqFTP.GetResponse();
                return uploadResponse.StatusCode;
            }
            catch (Exception e)
            {
                return FtpStatusCode.Undefined;
                throw new Exception("Ftp错误", e);
            }
        }