Dian.Biz.OrderBiz.GetOrderMainEntityList C# (CSharp) Method

        public List<OrderMainEntity> GetOrderMainEntityList(OrderMainEntity condition_entity)
        {
            GenericWhereEntity<OrderMainEntity> where_entity = new GenericWhereEntity<OrderMainEntity>();
            if (condition_entity.ORDER_ID != null)
                where_entity.Where(n => (n.ORDER_ID == condition_entity.ORDER_ID));
            if (condition_entity.RESTAURANT_ID != null)
                where_entity.Where(n => (n.RESTAURANT_ID == condition_entity.RESTAURANT_ID));
            if (condition_entity.TABLE_ID != null)
                where_entity.Where(n => (n.TABLE_ID == condition_entity.TABLE_ID));
            if (condition_entity.ORDER_FLAG != null)
                where_entity.Where(n => (n.ORDER_FLAG == condition_entity.ORDER_FLAG));
            return EntityExecution.SelectAll(where_entity);
        }

        public void ProcessRequest(HttpContext context)
        {
            try
            {
                var tableId = Helper.ParseInt(context.Request.QueryString["tid"]);
                var restaurantId = Helper.ParseInt(context.Request.QueryString["rid"]);
                var orderData = context.Request.Form["orderData"];
                var price = Helper.ParseDecimal(context.Request.Form["price"]);

                IOrder orderBiz = new OrderBiz();
                var condition = new OrderMainEntity();
                condition.RESTAURANT_ID = restaurantId;
                condition.TABLE_ID = tableId;
                condition.ORDER_FLAG = "1";
                var list = orderBiz.GetOrderMainEntityList(condition);
                if (list != null && list.Count > 0)
                {
                    context.Response.Write("{\"success\":0,\"msg\":\"上个订单还未结束，不能创建新的订单，请重新重新刷新页面！\"}");
                    return;
                }

                var list2 = JsonToObjects(orderData);
                if (list2 != null && list2.Count > 0)
                {
                    var orderId = orderBiz.CreateOrder(restaurantId, tableId, price, list2);
                    context.Response.Write("{\"success\":1,\"id\":" + orderId.ToString() + "}");
                }
            }
            catch (Exception ex)
            {
                context.Response.Write("{\"success\":0,\"msg\":\"订单数据有误，原因是" + ex.ToString() + "！\"}");
            }
        }