CSharp: Command Pattern in donet 6

 

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;

namespace ConsoleApp1;

/// <summary>
/// 股票
/// </summary>
public class Stock
{

    /// <summary>
    /// 名称
    /// </summary>
    private readonly string _name;

    /// <summary>
    /// 数量
    /// </summary>
    private readonly int _quantity;
    /// <summary>
    /// 
    /// </summary>
    /// <param name="name"></param>
    /// <param name="quantity"></param>
    public Stock(string name, int quantity)
    {
        _name = name;
        _quantity = quantity;
    }
    /// <summary>
    /// 买
    /// </summary>
    public void Buy() => Console.WriteLine($"股票 [ 名称: {_name}, 数量: {_quantity} ] 是买入.");
    /// <summary>
    /// 卖
    /// </summary>
    public void Sell() => Console.WriteLine($"股票 [ 名称: {_name}, 数量: {_quantity} ] 是卖出.");
}



using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;

namespace ConsoleApp1;
/// <summary>
/// 经纪人
/// </summary>
public class Broker
{

    /// <summary>
    /// 
    /// </summary>
    private readonly List<IOrderCommand> _orders = new();
    /// <summary>
    /// 
    /// </summary>
    /// <param name="order"></param>
    public void TakeOrder(IOrderCommand order) => _orders.Add(order);
    /// <summary>
    /// 
    /// </summary>
    public void ProcessOrders()
    {
        foreach (var order in _orders)
        {
            order.Execute();
        }

        _orders.Clear();
    }
}


using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;

namespace ConsoleApp1;

/// <summary>
/// 
/// </summary>
public interface IOrderCommand
{

    /// <summary>
    /// 处理
    /// </summary>
    void Execute();
}


using System;
using System.Collections;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;

namespace ConsoleApp1;

/// <summary>
/// 买
/// </summary>
public class BuyStockCommand : IOrderCommand
{

    /// <summary>
    /// 
    /// </summary>
    private readonly Stock _stock;

    /// <summary>
    /// 
    /// </summary>
    /// <param name="stock"></param>
    public BuyStockCommand(Stock stock)
    {
        _stock = stock;
    }
    /// <summary>
    /// 
    /// </summary>
    public void Execute() => _stock.Buy();
}

using System;
using System.Collections;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;

namespace ConsoleApp1;

/// <summary>
/// 卖
/// </summary>
public class SellStockCommand : IOrderCommand
{

    /// <summary>
    /// 
    /// </summary>
    private readonly Stock _stock;
    /// <summary>
    /// 
    /// </summary>
    /// <param name="stock"></param>
    public SellStockCommand(Stock stock)
    {
        _stock = stock;
    }
    /// <summary>
    /// 
    /// </summary>
    public void Execute() => _stock.Sell();
}


using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;

namespace ConsoleApp1;

/// <summary>
/// 
/// </summary>
public static class StockExecutor
{

    /// <summary>
    /// Command Pattern
    /// geovindu,Geovin Du，涂聚文
    /// 
    /// </summary>
    public static void Execute()
    {

       
        
        ConsoleExtension.WriteSeparator("股票 DEMO");
        //
        var stock = new Stock("GeovinDu 股票", 1285);
        //
        var buyStock = new BuyStockCommand(stock);
        var sellStock = new SellStockCommand(stock);

        var broker = new Broker();
        broker.TakeOrder(buyStock);
        broker.TakeOrder(sellStock);

        broker.ProcessOrders();
    }
}

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;

namespace ConsoleApp1;

/// <summary>
/// 
/// </summary>
public static class ConsoleExtension
{

    /// <summary>
    /// 显标题
    /// </summary>
    /// <param name="title"></param>
    public static void WriteSeparator(string title)
    {
        Console.WriteLine();
        Console.WriteLine(title);
        Console.WriteLine("--------------------------------------------------");
    }
}

　　

调用：

using ConsoleApp1;


// See https://aka.ms/new-console-template for more information
Console.WriteLine("Hello, geovindu!");
//
StockExecutor.Execute();

　　

输出：

Hello, geovindu!

股票 DEMO
--------------------------------------------------
股票 [ 名称: GeovinDu 股票, 数量: 1285 ] 是买入.
股票 [ 名称: GeovinDu 股票, 数量: 1285 ] 是卖出.