public async Task <string> AddSupplierInfo(string info)
        {
            SupplierInfo supplierInfo = JsonConvert.DeserializeObject <SupplierInfo>(info);
            SupplierDal  dal          = new SupplierDal();
            var          result       = await dal.AddSupplierInfo(supplierInfo);

            if (result.ResultCode != 0)
            {
                return(JsonConvert.SerializeObject(new
                {
                    status = "fail",
                    message = result.ResultMsg,
                    date = DateTime.Now.ToShortDateString()
                }));
            }

            return(JsonConvert.SerializeObject(new
            {
                status = "success",
                data = result.Data,
                date = DateTime.Now.ToShortDateString()
            }));
        }