在asp.net中长内容自动分页的实现

1 using System;
2 using System.Data;
3 using System.Configuration;
4 using System.Collections;
5 using System.Web;
6 using System.Web.Security;
7 using System.Web.UI;
8 using System.Web.UI.WebControls;
9 using System.Web.UI.WebControls.WebParts;
10 using System.Web.UI.HtmlControls;
11 
12 public partial class Page : System.Web.UI.Page
13 {
14     private string str;//字符
15     private int strl;//字符总长度
16     private int pagesize;//每页显示的字符数
17     protected void Page_Load(object sender, EventArgs e)
18     {
19         // 在此处放置用户代码以初始化页面   
20         str = "1234567891234567898522555";
21         pagesize = 3;
22         strl = str.Length;
23         Response.Write(strl);
24         substr();
25     }
26 
27     private void substr()
28     {
29         int ct = Int32.Parse(Request.QueryString["page"]);
30         if (strl == (strl / pagesize) * pagesize)//看看页面的总记录是否能被每页的记录数整除
31         {
32             for (int i = 1; i <= strl / pagesize; i++)
33             {
34                 Response.Write("页:<a href="page.aspx?page=" mce_href="page.aspx?page="" + i + ">" + (i) + "</" + "a>");
35             }
36             string s = str.Substring(pagesize * ct - pagesize, pagesize);
37             Response.Write(s);
38         }
39         else if (ct * pagesize > strl)//在不被整除的情况下,最后一页的设置,如字符长13,每页3,则处理最后那一页的显示
40         {
41             for (int i = 1; i <= (strl / pagesize) + 1; i++)
42             {
43                 Response.Write("页:<a href="page.aspx?page=" mce_href="page.aspx?page="" + i + ">" + (i) + "</" + "a>");
44             }
45             string s = str.Substring((ct - 1) * pagesize, strl - (ct - 1) * pagesize);
46             Response.Write(s);
47         }
48         else   //在不被整除的情况下其他页面的显示设置
49         {
50             for (int i = 1; i <= strl / pagesize + 1; i++)
51             {
52                 Response.Write("页:<a href="page.aspx?page=" mce_href="page.aspx?page="" + i + ">" + (i) + "</" + "a>");
53             }
54             string s = str.Substring(pagesize * ct - pagesize, pagesize);
55             Response.Write(s);
56         }
57     }
58 }