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 "; 31 32 pagestr += page > 1 ? "<a href="" + query_string + "?page=1">首页</a> <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 ? " <font color="#ff0000">" + i + "</font>" : " <a href="" + query_string + "?page=" + i + "">" + i + "</a>"; 37 } 38 pagestr += page != allpage ? " <a href="" + query_string + "?page=" + next + "">下一页</a> <a href="" + query_string + "?page=" + allpage + "">末页</a>" : " 下一页 末页"; 39 40 return pagestr; 41 }