<summary> /// 添加订单 /// </summary> /// <param name="dto"></param> /// <returns></returns> [HttpPost("AddOrder")] public async Task<IActionResult> AddOrder([FromBody]AddOrderDto dto) { if (dto?.ProductList==null) return BadRequest("参数不能为空"); Uow.BeginTransaction(); try { var orderHeader = new OrderHeader { CreateTime = DateTime.UtcNow, CustomerNo = dto.CustomerNo, State = 1, OrderNo = Guid.NewGuid().ToString("N") }; await OrderHeaderRepository.InsertAsync(orderHeader); var orderDetailList = new List<OrderDetail>(); //总消费金额 var totalAmount = 0m; dto.ProductList.ForEach(it => { var orderDetail = new OrderDetail { OrderHeaderId = orderHeader.Id, ProductNo = it.ProductNo, ProductName = it.ProductName, Quantity = it.Quantity, Price = it.Price }; orderDetailList.Add(orderDetail); totalAmount += it.Quantity * it.Price; }); await OrderDetailRepository.BatchInsertAsync(orderDetailList); //更新用户消费金额 var success = await CustomerRepository.UpdateCustomerAmount(dto.CustomerNo, totalAmount); if (!success) { Uow.RollBack(); return BadRequest(); } } catch (Exception e) { Uow.RollBack(); } Uow.Commit(); return Ok(); } /// <summary> /// 删库跑路 /// </summary> /// <returns></returns> [HttpGet("DeleteDatabase")] public async Task DeleteDatabase() { await OrderHeaderRepository.DeleteAllOrder(); } /// <summary> /// 根据会员编号取消订单 /// </summary> /// <param name="customerNo"></param> /// <returns></returns> [HttpGet("CancelOrderByCustomerNo")] public async Task<bool> CancelOrderByCustomerNo(string customerNo) { var count = await OrderHeaderRepository.CancelOrderByCustomerNoAsync(customerNo); return count > 0; } /// <summary> /// 分页，根据会员编号获取消费详情 /// </summary> /// <param name="customerNo"></param> /// <returns></returns> [HttpGet("QueryOrderDetailByCustomerNoByPage")] public async Task<Page<OrderDetail>> QueryOrderDetailByCustomerNoByPage(int pageNumber,int pageSize, string customerNo) { var page=new Pageable(pageNumber,pageSize); var result = await OrderDetailRepository.GetOrderDetailByCustomerNoByPageAsync(page,customerNo); return result; } /// <summary> /// 根据会员编号获取消费详情 /// </summary> /// <param name="customerNo"></param> /// <returns></returns> [HttpGet("QueryOrderDetailByCustomerNo")] public async Task<List<OrderDetail>> QueryOrderDetailByCustomerNo(string customerNo) { var result= await OrderDetailRepository.GetOrderDetailByCustomerNoAsync(customerNo); return result; }

动态生成接口实现类的原理

??最开始写的时候，思路是，采用AOP思想，castle动态生成接口实现类，实现类里的方法都没有具体实现，然后在切面里对方法进行拦截并且模拟方法的实现，提供返回值，java中很多骚操作就是这么实现的，但是后来发现在.net
中这种实现方式有很大的弊端，因为.net有异步方法，而castle对于异步方法的支持是很弱的，不足以实现最开始的设想，于是，我换了一种思路，在数据库操作和http调用中，抛开动态实现类这个壳子，具体执行操作的类是恒定不变的，
那么利用emit技术动态路由到要执行的方法就行了。

写在最后

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net core天马行空系列：降低net core门槛，数据库操作和http访问仅需写接口，实现类由框架动态生成

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