关于数据源翻页

 1  public class MyPage<T>
 2     {
 3         /// <summary>
 4         /// 当前显示页
 5         /// </summary>
 6         private int _currentIndex;
 7 
 8         public int CurrentIndex
 9         {
10             get
11             {
12                 return _currentIndex;
13             }
14         }
15 
16         /// <summary>
17         /// 比较数据源
18         /// </summary>
19         private ICollection<T> _dataSource;
20 
21         /// <summary>
22         /// 数据总条数
23         /// </summary>
24         private int _total;
25 
26         public bool IsBigOne
27         {
28             get
29             {
30                 return _dataSource.Count > 1;
31             }
32         }
33 
34         /// <summary>
35         /// 初始化
36         /// </summary>
37         /// <param name="data"></param>
38         public ComParisonPage(ICollection<T> data)
39         {
40             if (data != null)
41             {
42                 _dataSource = data;
43                 _currentIndex = 0;
44 
45             }
46         }
47 
48         /// <summary>
49         /// 上一页
50         /// </summary>
51         public void Prev()
52         {
53             _currentIndex -= 1;
54             if (_currentIndex < 0) _currentIndex = 0;
55         }
56 
57         /// <summary>
58         /// 下一页
59         /// </summary>
60         public void Next()
61         {
62             _currentIndex += 1;
63             if (_currentIndex >= _dataSource.Count - 1) _currentIndex = _dataSource.Count - 1;
64         }
65 
66         public T Current
67         {
68             get
69             {
70                 return _dataSource.ElementAt(_currentIndex);
71             }
72         }
73 
74 
75         public bool IsTop
76         {
77             get
78             {
79                 return _currentIndex == 0;
80             }
81         }
82 
83         public bool IsBottom
84         {
85             get
86             {
87                 return _currentIndex >= _dataSource.Count - 1;
88             }
89         }
90     }