C# Code:

using System;
using System.Collections.Generic;
using System.Text;

namespace CSFramework.Tech2011.PosTerminal
{
   
   /// <summary>
   /// 由收银台输入货品编号，返回Stock实体对象。
   /// 这里可以从SQL Server取数。
   /// </summary>
   public class StockData
   {
      //测试用.可创建两个货品对象
      public static Stock GetStock(string code)
      {
         code = code.ToUpper();
         if (code == "Vit.C".ToUpper())
         return new Stock("Vit.C", decimal.Parse("5.8"));
         else if (code == "Panicilin".ToUpper())
         return new Stock("Panicilin", decimal.Parse("15.20"));
         else
         return null;
      }
      
      // 这里可以从SQL Server取数。
      public static Stock GetStockFromSQL(string code)
      {
         //连接SQL Server.查询记录，返回Datarow,将Datarow 转换为Stock
         return null;
      }
      
   }
   
   /// <summary>
   /// 货品项目,收银台输入多少货品,注意Stock,Quantity属性
   /// </summary>
   public class StockItem
   {
      private Stock _Stock;
      private int _qty;
      
      public StockItem(Stock stock, int qty)
      {
         _Stock = stock;
         _qty = qty;
      }
      
      public Stock Stock { get { return _Stock; } set { _Stock = value; } }
      public int Quantity { get { return _qty; } set { _qty = value; } }
      
      
      public override string ToString()
      {
         return _Stock.Name " X " _qty.ToString();
      }
   }
   
   /// <summary>
   /// 货品类
   /// </summary>
   public class Stock
   {
      private string _Name = string.Empty;
      private decimal _Price = 0;
      
      public Stock(string name, decimal price)
      {
         _Name = name;
         _Price = price;
      }
      
      public string Name
      {
         get { return _Name; }
         set { _Name = value; }
      }
      
      public decimal Price
      {
         get { return _Price; }
         set { _Price = value; }
      }
      
   }
}


//来源:C/S框架网(www.csframework.com) QQ:1980854898