zoukankan      html  css  js  c++  java
  • .net EF 事物 订单流水号的生成 (二):观察者模式、事物、EF

      针对.net EF 事物 订单流水号的生成 (一)  的封装。

      数据依然不变。

    using System;
    using System.Linq;
    using System.Transactions;
    
    namespace ConsoleApplication1
    {
        class Program
        {
            static pengbgDBEntities db = new pengbgDBEntities();
            static void Main(string[] args)
            {
                try
                {
                    DAL dal = new DAL();
                    dal.AddOrder += dal_AddOrder;
                    var newOrderNo = dal.Tran(DAL.EnumOrderType.SM);
                    Console.WriteLine("添加成功:" + newOrderNo);
                }
                catch (Exception exception)
                {
                    Console.WriteLine(exception.Message);
                }
                finally
                {
                    Console.WriteLine("按任意键继续");
                    Console.ReadKey();
                }
            }
    
            static int dal_AddOrder(string orderNo)
            {
                db.SalesOrder.Add(new SalesOrder() { UserName = Console.ReadLine(), OrderNo = orderNo, OrderDate = DateTime.Now });
                return db.SaveChanges();
            }
        }
    
        public class DAL
        {
            public delegate int DelTranOrder(string orderNo);
            public event DelTranOrder AddOrder;
            public pengbgDBEntities db = new pengbgDBEntities();
    
            public int Add(string orderNo)
            {
                return AddOrder(orderNo);
            }
    
            public string BulidOrderNo(EnumOrderType enunType)
            {
                var orderType = enunType.ToString();
                var flowNo = db.FlowNo.FirstOrDefault(x => x.OrderType == orderType);
                var flowNoStart = DateTime.Now.ToString("yyMMdd-");
                var flowNoEnd = "1";
                if (flowNo != null)
                {
                    if (flowNo.OrderNo.Split('-')[0] != orderType + flowNoStart)
                    {
                        flowNoEnd = (int.Parse(flowNo.OrderNo.Split('-')[1]) + 1).ToString();
                    }
                }
                else
                {
                    db.FlowNo.Add(new FlowNo { OrderNo = flowNoStart + flowNoEnd.PadLeft(5, '0'), OrderType = orderType, Remark = "New" });
                }
                return orderType + flowNoStart + flowNoEnd.PadLeft(5, '0');
            }
    
            public string Tran(EnumOrderType orderType)
            {
                var newOrderType = BulidOrderNo(orderType);
                using (var scope = new TransactionScope())
                {
                    AddOrder(newOrderType);
                    var flowNo = db.FlowNo.FirstOrDefault(x => x.OrderType == orderType.ToString());
                    if (flowNo != null)
                        flowNo.OrderNo = newOrderType;
                    db.SaveChanges();
                    scope.Complete();
                }
                return newOrderType;
            }
    
            public enum EnumOrderType
            {
                SM,//销售订单
                PM // 外发订单
                //......其他
            }
        }
    }
  • 相关阅读:
    网络基础之网络协议篇
    JVM-07-执行引擎
    JVM-06-对象实例化、内存布局、访问定位以及直接内存
    JVM-05-方法区
    JVM-04-堆
    JVM-03-本地方法接口和本地方法栈
    JVM-02-程序计数器 虚拟机栈
    JVM-01-类加载子系统
    JVM-00-引言
    swagger
  • 原文地址:https://www.cnblogs.com/bingguang/p/5258163.html
Copyright © 2011-2022 走看看