C#實現簡單訂單管理程序
本文實例為大傢分享瞭C#實現訂單管理程序的具體代碼，供大傢參考，具體內容如下
訂單管理的控制臺程序，能夠實現添加訂單、刪除訂單、修改訂單、查詢訂單、序列化與反序列化訂單功能。
主要的類有Order（訂單）、OrderItem（訂單明細項），OrderService（訂單服務），訂單數據可以保存在OrderService中一個List中。在Program裡面可以調用OrderService的方法完成各種訂單操作。
要求：
（1）使用LINQ語言實現各種查詢功能，查詢結果按照訂單總金額排序返回。
（2）在訂單刪除、修改失敗時，能夠產生異常並顯示給客戶錯誤信息。
（3）作業的訂單和訂單明細類需要重寫Equals方法，確保添加的訂單不重復，每個訂單的訂單明細不重 復。
（4）訂單、訂單明細、客戶、貨物等類添加ToString方法，用來顯示訂單信息。
（5）OrderService提供排序方法對保存的訂單進行排序。默認按照訂單號排序，也可以使用Lambda表達式進行自定義排序。
（6）在OrderService中添加一個Export方法，可以將所有的訂單序列化為XML文件；添加一個Import方法可以從XML文件中載入訂單。
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("輸入1增加訂單，輸入2刪除訂單，輸入3查詢訂單，輸入4顯示所有訂單，輸入5根據訂單號為訂單排序,輸入6序列化訂單，輸入7反序列化訂單，輸入8退出");
string choose1 = Console.ReadLine();
switch (choose1)
{
case "1": a.addOrder(); break;
case "2": a.removeOrder(); break;
case "3": Console.WriteLine("輸入1根據訂單金額查詢訂單，輸入2根據客戶名查詢訂單"); 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("輸入錯誤"); break;
}
}
}
}
[Serializable]
public class AllOrder:IOrderService //所有訂單
{
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("反序列化結果：");
foreach (Order d in c)
{
Console.WriteLine("訂單號 客戶 日期 總金額");
Console.WriteLine("----------------------------");
Console.WriteLine("{0} {1} {2} {3}", d.Id, d.Customer, d.Date, d.Money);
d.showOrderItem();
}
}
}
catch
{
Console.WriteLine("序列化系列操作錯誤");
}
}
public void ShowOrder()
{
foreach (Order a in this.order) {
Console.WriteLine("訂單號 客戶 日期 總金額");
Console.WriteLine("----------------------------");
Console.WriteLine("{0} {1} {2} {3}", a.Id,a.Customer,a.Date,a.Money);
a.showOrderItem();
}
}
public void addOrder() //增加訂單
{
try
{
Console.WriteLine("請輸入訂單編號：");
int id = Convert.ToInt32(Console.ReadLine());
Console.WriteLine("請輸入客戶名稱：");
string customer = Console.ReadLine();
Console.WriteLine("請輸入時間：");
string date = Console.ReadLine();
Order a = new Order(id, customer, date);
Console.WriteLine("輸入訂單項：");
bool judge = true;
bool same = false;
foreach(Order m in this.order)
{
if (m.Equals(a)) same = true;
}
if (same) Console.WriteLine("訂單號重復");
else
{
while (judge && !same)
{
Console.WriteLine("請輸入物品名稱：");
string name = Console.ReadLine();
Console.WriteLine("請輸入購買數量：");
int number = Convert.ToInt32(Console.ReadLine());
Console.WriteLine("請輸入單價：");
double price = Convert.ToDouble(Console.ReadLine());
a.addOrderItem(name, number, price);
Console.WriteLine("是否繼續添加訂單項：");
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("輸入錯誤");
}
}
public void removeOrder() //刪除訂單
{
try
{
Console.WriteLine("輸入訂單號刪除訂單或相應明細：");
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("輸入1刪除訂單，輸入2繼續刪除訂單明細");
int choose = Convert.ToInt32(Console.ReadLine());
switch (choose)
{
case 1: this.order.RemoveAt(index); Console.WriteLine("刪除成功"); Console.WriteLine("-----------------"); break;
case 2: this.order[index].showOrderItem(); this.order[index].RemoveOrderItem(); break;
default: Console.WriteLine("輸入錯誤"); break;
}
}
catch
{
Console.WriteLine("輸入錯誤");
}
}
public void searchOrder(int i) //查詢訂單
{
try
{
switch (i)
{
case 1:
int minNum, maxNum;
Console.WriteLine("輸入要查詢的最小金額：");
minNum = Convert.ToInt32(Console.ReadLine());
Console.WriteLine("輸入要查詢的最大金額：");
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("訂單號 客戶 日期 總金額");
Console.WriteLine("----------------------------");
Console.WriteLine("{0} {1} {2} {3}", b1.Id, b1.Customer, b1.Date, b1.Money);
b1.showOrderItem();
}
break;
case 2:
Console.WriteLine("輸入客戶名稱：");
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("訂單號 客戶 日期 總金額");
Console.WriteLine("----------------------------");
Console.WriteLine("{0} {1} {2} {3}", b2.Id, b2.Customer, b2.Date, b2.Money);
b2.showOrderItem();
}
break;
default: Console.WriteLine("輸入錯誤"); break;
}
}
catch
{
Console.WriteLine("輸入錯誤");
}
}
}
[Serializable]
public class Order:IComparable //單個訂單項
{
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()//無參構造函數
{
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() //計算總價
{
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) //添加訂單項
{
OrderItem a = new OrderItem(name, number, price);
this.orderItem.Add(a);
}
public void RemoveOrderItem() //刪除訂單項
{
try
{
Console.WriteLine("請輸入訂單明細序號刪除相應訂單明細：");
int a = Convert.ToInt32(Console.ReadLine());
this.orderItem.RemoveAt(a);
Console.WriteLine("刪除成功");
Console.WriteLine("-------------------------");
}
catch
{
Console.WriteLine("輸入序號錯誤");
}
}
public void showOrderItem() //展示訂單項
{
Console.WriteLine("序號 名稱 數量 單價");
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 //訂單明細項
{
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("數量不應該小於0");
}
}
private double price;
public double Price
{
get
{
return price;
}
set
{
price = value;
}
}
public OrderItem()//無參構造函數
{
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 //包含所有訂單功能的接口
{
void addOrder();
void removeOrder();
void searchOrder(int i);
void export();
void import();
}
}
以上就是本文的全部內容，希望對大傢的學習有所幫助，也希望大傢多多支持WalkonNet。