/// <summary>

        /// json格式转换（引用System.Web.Extension类库）

        /// </summary>

        /// <param name="json"></param>

        /// <returns></returns>

        public static T ChangeJsonToModel<T>(this string json)

        {

            var javaScriptSerializer = new JavaScriptSerializer { MaxJsonLength = Int32.MaxValue };

            var printQtyVsOrderQtyReportResult = javaScriptSerializer.Deserialize<T>(json);

            return printQtyVsOrderQtyReportResult;

        }