当前文件： SmallBusinessStarterKit/App_Code/Catalog/Item.cs[2K，2009-6-12 11:54:21]，打开代码结构图

		            
 1using System;
 2/**////<summary>
 3//业务对象，表示产品。
 4/**////</summary>
 5public class Item
 6...{
 7    //----------------------------------------------
 8    //私有字段区，定义属性内部使用的字段
 9    //----------------------------------------------
10    private string  _id;            
11    private string _title;          
12    private bool    _visible;       
13    private string  _description;   
14    private double  _price;         
15    private bool    _inStock;       
16    private string  _imageUrl;      
17    private string  _imageAltText;  
18    //构造函数，为实体对象指定初始参数
19    public Item(string id,
20                bool visible,
21                string title)
22    ...{
23        if (String.IsNullOrEmpty(id)) throw new ArgumentException(Messages.ItemIdUndefined);
24        if (String.IsNullOrEmpty(title)) throw new ArgumentException(Messages.ItemTitleUndefined);
25        _id = id;
26        _visible = visible;
27        _title = title;
28
29    }
30    //----------------------------------------------
31    //属性定义区，为不同的实体属性定义访问方法。
32    //----------------------------------------------   
33    //主键ID
34    public string Id
35    ...{
36        get ...{ return String.IsNullOrEmpty(_id) ? String.Empty : _id; }
37    }
38    //产品是否可见
39    public bool Visible
40    ...{
41        get ...{ return _visible; }
42        set ...{ _visible = value; }
43    }
44    //产品标题
45    public string Title
46    ...{
47        get ...{ return String.IsNullOrEmpty(_title) ? String.Empty : _title; }
48        set 
49        ...{    if (String.IsNullOrEmpty(value))
50            throw new InvalidOperationException(Messages.ItemTitleIsNull);
51            _title = value; 
52        }
53    }
54    //产品描述
55    public string Description
56    ...{
57        get ...{ return _description; }
58        set ...{ _description = value; }
59    }
60    //
61    public double Price
62    ...{
63        get ...{ return  _price; }
64        set ...{ _price = value; }
65    }
66    //产品价格
67    public bool InStock
68    ...{
69        get ...{ return _inStock; }
70        set ...{ _inStock = value; }
71    }
72    //产品图片链接
73    public string ImageUrl
74    ...{
75        get ...{ return String.IsNullOrEmpty(_imageUrl) ? String.Empty : _imageUrl; }
76        set ...{ _imageUrl = value; }
77    }
78    //产品图片显示交替文本。
79    public string ImageAltText
80    ...{
81        get ...{ return String.IsNullOrEmpty(_imageAltText) ? String.Empty : _imageAltText; }
82        set ...{ _imageAltText = value; }
83    }
84}
85