订单管理的控制台程序，能够实现添加订单、删除订单、修改订单、查询订单、序列化与反序列化订单功能。
主要的类有Order（订单）、OrderItem（订单明细项），OrderService（订单服务），订单数据可以保存在OrderService中一个List中。在Program里面可以调用OrderService的方法完成各种订单操作。
要求：
（1）使用LINQ语言实现各种查询功能，查询结果按照订单总金额排序返回。
（2）在订单删除、修改失败时，能够产生异常并显示给客户错误信息。
（3）作业的订单和订单明细类需要重写Equals方法，确保添加的订单不重复，每个订单的订单明细不重 复。
（4）订单、订单明细、客户、货物等类添加ToString方法，用来显示订单信息。
（5）OrderService提供排序方法对保存的订单进行排序。默认按照订单号排序，也可以使用Lambda表达式进行自定义排序。
（6）在OrderService中添加一个Export方法，可以将所有的订单序列化为XML文件；添加一个Import方法可以从XML文件中载入订单。
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using System; using System.Collections.Generic; using System.IO; using System.Linq; using System.Xml.Serialization;
namespace exercise20200320 { class Program { static void Main(string[] args) { AllOrder a = new AllOrder(); bool judge_ = true; while (judge_) { Console.WriteLine("输入1增加订单，输入2删除订单，输入3查询订单，输入4显示所有订单，输入5根据订单号为订单排序,输入6序列化订单，输入7反序列化订单，输入8退出"); string choose1 = Console.ReadLine(); switch (choose1) { case "1": a.addOrder(); break; case "2": a.removeOrder(); break; case "3": Console.WriteLine("输入1根据订单金额查询订单，输入2根据客户名查询订单"); int i = Convert.ToInt32(Console.ReadLine()); a.searchOrder(i); break; case "4": a.ShowOrder(); break; case "5": a.order.Sort(); break; case "6": a.export(); break; case "7": a.import(); break; case "8":judge_ = false;break; default: Console.WriteLine("输入错误"); break; } } } } [Serializable] public class AllOrder:IOrderService //所有订单 { public List<Order> order = new List<Order>();
public AllOrder() {
}
public void export() { XmlSerializer a = new XmlSerializer(typeof(List<Order>)); using (FileStream b = new FileStream("order.xml", FileMode.Create)) { a.Serialize(b, this.order); } Console.WriteLine("序列化完成"); }
public void import() { try { XmlSerializer a = new XmlSerializer(typeof(List<Order>)); using (FileStream b = new FileStream("order.xml", FileMode.Open)) { List<Order> c = (List<Order>)a.Deserialize(b); Console.WriteLine("反序列化结果："); foreach (Order d in c) { Console.WriteLine("订单号 客户 日期 总金额"); Console.WriteLine("----------------------------"); Console.WriteLine("{0} {1} {2} {3}", d.Id, d.Customer, d.Date, d.Money); d.showOrderItem(); } } } catch { Console.WriteLine("序列化系列操作错误"); } } public void ShowOrder() {
foreach (Order a in this.order) { Console.WriteLine("订单号 客户 日期 总金额"); Console.WriteLine("----------------------------"); Console.WriteLine("{0} {1} {2} {3}", a.Id,a.Customer,a.Date,a.Money); a.showOrderItem(); } } public void addOrder() //增加订单 { try { Console.WriteLine("请输入订单编号："); int id = Convert.ToInt32(Console.ReadLine()); Console.WriteLine("请输入客户名称："); string customer = Console.ReadLine(); Console.WriteLine("请输入时间："); string date = Console.ReadLine(); Order a = new Order(id, customer, date); Console.WriteLine("输入订单项："); bool judge = true; bool same = false; foreach(Order m in this.order) { if (m.Equals(a)) same = true; } if (same) Console.WriteLine("订单号重复"); else { while (judge && !same) { Console.WriteLine("请输入物品名称："); string name = Console.ReadLine(); Console.WriteLine("请输入购买数量："); int number = Convert.ToInt32(Console.ReadLine()); Console.WriteLine("请输入单价："); double price = Convert.ToDouble(Console.ReadLine()); a.addOrderItem(name, number, price); Console.WriteLine("是否继续添加订单项："); string x = Console.ReadLine(); if (x == "否") judge = false; else if(x=="是") continue; else if(x!="否"&&x!="是"){ Exception e = new Exception(); throw e; } } order.Add(a); a.getAllPrice(); Console.WriteLine("建立成功"); Console.WriteLine("-------------------------"); } } catch { Console.WriteLine("输入错误"); }
} public void removeOrder() //删除订单 { try { Console.WriteLine("输入订单号删除订单或相应明细："); int id = Convert.ToInt32(Console.ReadLine()); int index = 0; foreach (Order a in this.order) { if (a.Id == id) index = this.order.IndexOf(a); } Console.WriteLine("输入1删除订单，输入2继续删除订单明细"); int choose = Convert.ToInt32(Console.ReadLine()); switch (choose) { case 1: this.order.RemoveAt(index); Console.WriteLine("删除成功"); Console.WriteLine("-----------------"); break; case 2: this.order[index].showOrderItem(); this.order[index].RemoveOrderItem(); break; default: Console.WriteLine("输入错误"); break; } } catch { Console.WriteLine("输入错误"); }
}
public void searchOrder(int i) //查询订单 { try { switch (i) { case 1: int minNum, maxNum; Console.WriteLine("输入要查询的最小金额："); minNum = Convert.ToInt32(Console.ReadLine()); Console.WriteLine("输入要查询的最大金额："); maxNum = Convert.ToInt32(Console.ReadLine());
var query1 = from s1 in order where maxNum > s1.Money orderby s1.Money select s1; var query3 = from s3 in query1 where s3.Money > minNum orderby s3.Money select s3;
List<Order> a1 = query3.ToList();
foreach (Order b1 in a1) { Console.WriteLine("订单号 客户 日期 总金额"); Console.WriteLine("----------------------------"); Console.WriteLine("{0} {1} {2} {3}", b1.Id, b1.Customer, b1.Date, b1.Money); b1.showOrderItem(); } break; case 2:
Console.WriteLine("输入客户名称："); string name1 = Console.ReadLine();
var query2 = from s2 in order where s2.Customer == name1 orderby s2.Money select s2; List<Order> a2 = query2.ToList();
foreach (Order b2 in a2) { Console.WriteLine("订单号 客户 日期 总金额"); Console.WriteLine("----------------------------"); Console.WriteLine("{0} {1} {2} {3}", b2.Id, b2.Customer, b2.Date, b2.Money); b2.showOrderItem(); } break; default: Console.WriteLine("输入错误"); break;
} } catch { Console.WriteLine("输入错误"); } }
} [Serializable] public class Order:IComparable //单个订单项 { public int Id { get; set; } public string Customer { get; set; } public double Money { get; set; } public string Date { get; set; }
public List<OrderItem> orderItem = new List<OrderItem>();
public Order()//无参构造函数 { this.Id = 0; this.Customer = string.Empty; this.Money = 0; this.Date = string.Empty;
} public int CompareTo(object obj) { Order a = obj as Order; return this.Id.CompareTo(a.Id); } public override bool Equals(object obj) { Order a = obj as Order; return this.Id == a.Id; }
public override int GetHashCode() { return Convert.ToInt32(Id); } public Order(int id,string customer,string date) { this.Id = id; this.Customer = customer; this.Date = date; } public void getAllPrice() //计算总价 { double i=0; foreach(OrderItem a in this.orderItem) { i = i + a.getPrice(); } this.Money = i;
}
public void addOrderItem(string name,int number,double price) //添加订单项 { OrderItem a = new OrderItem(name, number, price); this.orderItem.Add(a); } public void RemoveOrderItem() //删除订单项 { try { Console.WriteLine("请输入订单明细序号删除相应订单明细："); int a = Convert.ToInt32(Console.ReadLine()); this.orderItem.RemoveAt(a); Console.WriteLine("删除成功"); Console.WriteLine("-------------------------"); } catch { Console.WriteLine("输入序号错误"); } }
public void showOrderItem() //展示订单项 { Console.WriteLine("序号 名称 数量 单价"); foreach (OrderItem a in this.orderItem) {
Console.WriteLine("-----------------------"); Console.WriteLine("{0} {1} {2} {3}",this.orderItem.IndexOf(a),a.Name,a.Number,a.Price); } }
} [Serializable] public class OrderItem //订单明细项 { private string name; public string Name { get { return name; } set { name = value; } } private int number; public int Number { get { return number; } set { if (value >= 0) number = value; else Console.WriteLine("数量不应该小于0"); } } private double price; public double Price { get { return price; } set { price = value; } }
public OrderItem()//无参构造函数 { this.Name = string.Empty; this.Number = 0; this.Price = 0; }
public OrderItem(string name, int number, double price) { this.name = name; this.number = number; this.price = price; } public double getPrice() { return this.number * this.price; }
} public interface IOrderService //包含所有订单功能的接口 { void addOrder(); void removeOrder(); void searchOrder(int i); void export(); void import();
} } |
