webapi批量上传照片（三）（base64）

public HttpResponseMessage AddVisitNew(HttpRequestMessage request, CustomerVisitAddNewModel model)
        {
            return CreateHttpPostResponse<long>(request, () =>
            {
                var res = customerVisitInfoService.AddVisitNew(model, CurrentUserId);
                if (string.IsNullOrEmpty(res.Error))
                {
                    // 上传拜访记录照片
                    string visitPath = null;
                    FtpClient ftpClient = new FtpClient(GlobalConst.FtpAddress, GlobalConst.Username, GlobalConst.Password);
                    string visitUploadDir = Path.Combine(GlobalConst.FILE_VISIT, "file");

                    for (var i = 0; i < model.VisitPic.Count; i++)
                    {
                        //获取base64编码的图片
                        HttpContextBase context = (HttpContextBase)Request.Properties["MS_HttpContext"];

                        //获取文件储存路径
                        string path = context.Request.MapPath("~/"); //获取当前项目所在目录
                        string fName = "{0}".Fmt(DateTime.Now.ToString("yyyyMMddHHmmssfff")) + i;
                        string suffix = ".jpg"; 
                        string strPath = path + "App_Data/" + fName + suffix;
                        string newFileName = fName + suffix;

                        //获取图片并保存
                        Base64ToImg(model.VisitPic[i].Split(',')[1]).Save(strPath);
                        
                        //上传FTP
                        string uploadFilePath = Path.Combine(visitUploadDir, newFileName);
                        visitPath = ftpClient.UploadFile(strPath, uploadFilePath, true);
                        //FTP 转 HTTP
                        visitPath = "{0}".Fmt(UriHelper.GetAbsolutePath(visitPath));
                        
                        var pic = new VisitPiction
                        {
                            CustomerVisitInfoId = res.Data,
                            Createtime = DateTime.Now,
                            Path = visitPath
                        };
                        customerVisitInfoService.AddVisitPic(pic);
                    }
                    Logger.Info("visits/add customer: " + model.CustomerId + ", VisitStatus: " + model.VisitStatus + ", ReVisitPlanTime: " + model.ReVisitPlanTime + ", ExpenrienceTime: " + model.ExpenrienceTime);
                }
                return res;
            });
        }

        //解析base64编码获取图片
        private Bitmap Base64ToImg(string base64Code)
        {
            MemoryStream stream = new MemoryStream(Convert.FromBase64String(base64Code));
            return new Bitmap(stream);
        }