模拟google分页效果 

 1 /// </summary>
 2     /// <param name="total">总记录数</param>
 3     /// <param name="per">每页记录数</param>
 4     /// <param name="page">当前页数</param>
 5     /// <param name="query_string">Url参数</param>
 6     private string pagination(int total, int per, int page, string query_string)
 7     {
 8         int allpage = 0;
 9         int next = 0;
10         int pre = 0;
11         int startcount = 0;
12         int endcount = 0;
13         string pagestr = "";
14 
15         if (page < 1) { page = 1; }
16         //计算总页数
17         if (per != 0)
18         {
19             allpage = (total / per);
20             allpage = ((total % per) != 0 ? allpage + 1 : allpage);
21             allpage = (allpage == 0 ? 1 : allpage);
22         }
23         next = page + 1;
24         pre = page - 1;
25         startcount = (page + 5) > allpage ? allpage - 9 : page - 4;//中间页起始序号
26         //中间页终止序号
27         endcount = page < 5 ? 10 : page + 5;
28         if (startcount < 1) { startcount = 1; } //为了避免输出的时候产生负数，设置如果小于1就从序号1开始
29         if (allpage < endcount) { endcount = allpage; }//页码+5的可能性就会产生最终输出序号大于总页码，那么就要将其控制在页码数之内
30         pagestr = "共" + allpage + "页&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;";
31 
32         pagestr += page > 1 ? "<a href=\"" + query_string + "?page=1\">首页</a>&nbsp;&nbsp;<a href=\"" + query_string + "?page=" + pre + "\">上一页</a>" : "首页 上一页";
33         //中间页处理，这个增加时间复杂度，减小空间复杂度
34         for (int i = startcount; i <= endcount; i++)
35         {
36             pagestr += page == i ? "&nbsp;&nbsp;<font color=\"#ff0000\">" + i + "</font>" : "&nbsp;&nbsp;<a href=\"" + query_string + "?page=" + i + "\">" + i + "</a>";
37         }
38         pagestr += page != allpage ? "&nbsp;&nbsp;<a href=\"" + query_string + "?page=" + next + "\">下一页</a>&nbsp;&nbsp;<a href=\"" + query_string + "?page=" + allpage + "\">末页</a>" : " 下一页 末页";
39 
40         return pagestr;
41     }

 

posted @ 2013-07-29 15:29  Servant  阅读(165)  评论(0)    收藏  举报