// Create or Update
        public override string PostAction(string parameters, NameValueCollection querystring, string postdata)
        {
            var data     = string.Empty;
            var bvin     = FirstParameter(parameters);
            var fileName = querystring["filename"];
            var response = new ApiResponse <bool>();

            byte[] postedData = null;
            try
            {
                postedData       = Json.ObjectFromJson <byte[]>(postdata);
                response.Content = DiskStorage.UploadCategoryBanner(HccApp.CurrentStore.Id, bvin, fileName, postedData);
            }
            catch (Exception ex)
            {
                response.Errors.Add(new ApiError("EXCEPTION", ex.Message));
                return(Json.ObjectToJson(response));
            }

            data = Json.ObjectToJson(response);
            return(data);
        }