C#自定义分页方法一

说到分页，大多数人都是想到的数据库分页，当然那个是开发必备的知识。但是现在我要给大家介绍的是自己写个页面的分页方法，就是平时看到的列表页的“上一页”，“下一页”

等。很久以前自己都是用的分页控件完成分页，但是很多时候，发现它并不能满足一些功能的时候，就得自己写了。废话不说了，上代码！

 1 static string First = "<li class="pagesdiv_first"><a href="{0}"></a></li>";//第一页
 2         static string FirstNo = "<li class="pagesdiv_first"><a href="javascript:void(0)"></a></li>";
 3         static string Previous = "<li class="pagesdiv_pre"><a href="{0}"></a></li>";//上一页
 4         static string PreviousNo = "<li class="pagesdiv_pre"><a href="javascript:void(0)"></a></li>";
 5         static string Middle = "<li class="pagesdiv_com"><a href="{0}">{1}</a></li>";//当前页
 6         static string MiddleNo = "<li class="pagesdiv_curr">{0}</li>";
 7         static string Next = "<li class="pagesdiv_nex"><a href="{0}"></a></li>";//下一页
 8         static string NextNo = "<li class="pagesdiv_nex"><a href="javascript:void(0)"></a></li>";
 9         static string Last = "<li class="pagesdiv_last"><a href="{0}"></a></li>";//最末页
10         static string LastNo = "<li class="pagesdiv_last"><a href="javascript:void(0)"></a></li>";
11         /// <summary>
12         /// 分页方法
13         /// </summary>
14         /// <param name="PageIndex">页索引，1开始</param>
15         /// <param name="PageSize">页大小</param>
16         /// <param name="DataCount">总数据条数</param>
17         /// <param name="Len">显示分页长度</param>
18         /// <param name="CurrPage">当前页</param>
19         /// <returns></returns>
20         public static string PagingString(int PageIndex,int PageSize, int DataCount, int Len, string CurrPage)
21         {
22             StringBuilder PageString = new StringBuilder();
23             //根据数据总条数和每页显示条数，计算出列表页数量
24             int PageCount = DataCount % PageSize == 0 ? (DataCount / PageSize) : (DataCount / PageSize + 1);
25             if (PageIndex <= 0)
26                 PageIndex = 1;
27             if (PageIndex > PageCount)
28                 PageIndex = PageCount;
29 
30             int In = (PageIndex - 1) / Len;
31 
32             //每一页的第一个编号
33             int L = In * Len + 1;
34             //每一页的最后一个编号
35             int Lent = PageCount >= (L + Len - 1) ? (L + Len - 1) : PageCount;
36             if (PageIndex == 1)
37             {
38                 PageString.AppendFormat(FirstNo, 1);
39                 PageString.Append(PreviousNo);
40             }
41             else
42             {
43                 PageString.AppendFormat(First, string.Format(CurrPage, 1));
44                 PageString.AppendFormat(Previous, string.Format(CurrPage, (PageIndex - 1)));
45             }
46 
47             if (PageIndex == PageCount)
48             {
49                 if (PageCount % Len == 0)
50                     L = PageCount - (Len - 1);
51                 else
52                     L = PageCount - (PageCount % Len - 1);
53                 for (int i = L; i <= PageCount; i++)
54                 {
55                     if (PageIndex == i)
56                         PageString.AppendFormat(MiddleNo, i);
57                     else
58                         PageString.AppendFormat(Middle, string.Format(CurrPage, i), i);
59                 }
60             }
61             else
62             {
63                 for (int i = L; i <= Lent; i++)
64                 {
65                     if (PageIndex == i)
66                         PageString.AppendFormat(MiddleNo, i);
67                     else
68                         PageString.AppendFormat(Middle, string.Format(CurrPage, i), i);
69                 }
70             }
71 
72 
73             if (PageIndex == PageCount)
74             {
75                 PageString.AppendFormat(NextNo);
76                 PageString.AppendFormat(LastNo);
77             }
78             else//最后一页的分页列表
79             {
80                 PageString.AppendFormat(Next, string.Format(CurrPage, (PageIndex + 1)));
81                 PageString.AppendFormat(Last, string.Format(CurrPage, PageCount));
82             }
83             return PageString.ToString();
84         }

View Code