asp.net 分页

/// <param name="total">总记录数</param>
  /// <param name="per">每页记录数</param>
  /// <param name="page">当前页数</param>
  /// <param name="query_string">Url参数</param>
  public static string pagination(int total,int per,int page,string query_string)
  {
   int allpage=0;
   int next=0;
   int pre=0;
   int startcount=0;
   int endcount=0;
   string pagestr="";
   if (query_string.IndexOf("?") > 0)
   {
    query_string = query_string + "&";
   }
   else
   {
    query_string = query_string + "?";
   }
   if(page<1){page=1;}
   //计算总页数
   if (per != 0)
   {
    allpage = (total / per);
    allpage = ((total % per) != 0 ? allpage + 1 : allpage);
    allpage = (allpage == 0 ? 1 : allpage);
   }
   next=page+1;
   pre=page-1;
   startcount=(page+5)>allpage?allpage-9:page-4;//中间页起始序号
   //中间页终止序号
   endcount = page<5 ? 10 : page+5;
   if(startcount<1) {startcount=1;}
   if(allpage<endcount){endcount=allpage;}
   pagestr="总共<font color=red>"+total+"</font>条记录  第<font color=red>"+page+"</font>页/共<font color=red>"+ allpage +"</font>页&nbsp;&nbsp;&nbsp;";
           
   pagestr+=page>1 ?  "<a href=/""+ query_string + "page=1/">首页</a>&nbsp;<a href=/""+ query_string +"page="+ pre +"/">上一页</a>": "<font color=#BABABA>首页 上一页</font>";
   
   for(int i=startcount;i<=endcount;i++)
   {
    pagestr+=page==i?"&nbsp;<font color=/"#ff0000/">["+i+"]</font>":"&nbsp;<a href=/""+ query_string +"page="+ i +"/">["+ i +"]</a>";
   }
   pagestr+=page!=allpage ? "&nbsp;<a href=/""+ query_string+"page="+ next +"/">下一页</a>&nbsp;<a href=/""+ query_string +"page="+ allpage+"/">末页</a>" : " <font color=#BABABA>下一页 末页</font>";

   return pagestr;
  }