public ResultModel upLoad([FromBody] Base64Str base64)
        {
            ResultModel res  = new ResultModel();
            string      name = FileTools.Base64StrToImage(base64.base64);

            if (name != null)
            {
                res.status = "200";
                res.insert("fileName", name);
            }
            else
            {
                res.status = "500";
            }
            return(res);
        }