odbc|分页<?
class Pages{
    var $cn;        //连接数据库游标
    var $d;            //连接数据表的游标
    var $result;    //结果
    var $dsn;        //dsn源
    var $user;        //用户名    
    var $pass;        //密码
    
    var $total;        //记录总数
    var $pages;        //总页数
    var $onepage;    //每页条数
    var $page;        //当前页
    var $fre;        //上一页
    var $net;        //下一页
    var $i;          //控制每页显示

    ##############################
    ########  连接数据库 ##########
    function getConnect($dsn,$user,$pass){
        $this->cn=odbc_connect($dsn,$user,$pass);
        if(!$this->cn){
            $error="连接数据库出错";
            $this->getMess($error);
        }
    }

    ##############################
      ######## 进行表的查询 #########
    function getDo($sql){        //从表中查询数据
        $this->d=odbc_do($this->cn,$sql);
        if(!$this->d){
            $error="查询时发生了小错误......";
            $this->getMess($error);
        }
        return $this->d;
    }
   
       #################################
      ######## 求表中数据的总量 #########
    function getTotal($sql){
        $this->sql=$sql;
        $dT=$this->getDo($this->sql);        //求总数的游标
        $this->total=odbc_result($dT,"total");        //这里为何不能$this->d,total 为一个字段
        //    $this->total=odbc_num_rows($dT);         //应唠叨老大的意见，odbc_num_rows 不能用，不知为何,返回为-1
        return $this->total;
    }

    ##############################
    ######## 进行表的查询 #########
    function getList($sql,$onepage,$page){
        if ($page<>"" and $page<1)         //当此页小于时的处理
            $page=1;
        $this->s=$sql;
        $this->onepage=$onepage;        //每页显示的记录数
        $this->page=$page;        //页数
        $this->dList=$this->getDo($this->s);      //连接表的游标
        $this->pages=ceil($this->total/$this->onepage);     //计算大于指定数的最小整数
        if ($this->page>$this->pages)          //当此页大于最大页的处理
            $this->page=$this->pages;
        if($this->pages==0)
            $this->pages++;        //不能取到第0页
        if(!isset($this->page))
            $this->page=1;
        $this->fre = $this->page-1;      //将显示的页数
        $this->nxt = $this->page+1;
        $this->nums=($this->page-1)*$this->onepage;
        return $this->dList;
    }
    
    ##############################
    function getfetch_row($dList){
        return odbc_fetch_row($dList);
    }   

       ##############################
    function getresult($dList,$num){
        return odbc_result($dList,$num);
    }    
    ##############################
    ######## 翻页 ################
    function getFanye(){
        $str="";
        if($this->page!=1)
            $str.="<form name=go2to form method=Post action='".$PHP_SELF."'><a href=".$PHP_SELF."?page=1> 首页 </a><a href=".$PHP_SELF."?page=".$this->fre."> 前页 </a>";
        else
            $str.="<font color=999999>首页 前页</font>";
        if($this->page<$this->pages)
            $str.="<a href=".$PHP_SELF."?page=".$this->nxt."> 后页 </a>";
        else
            $str.="<font color=999999> 后页 </font>";
        if($this->page!=$this->pages)
            $str.="<a href=".$PHP_SELF."?page=".$this->pages."> 尾页 </a>";
        else
            $str.="<font color=999999> 尾页 </font>";
        
        $str.="共".$this->pages."页";
        $str.="<font color='000064'>  转到 第<input type='text' name='page' size=2 maxLength=3 9pt; color:#00006A; position: relative; height: 18' value=".$this->page.">页</font> ";
        $str.="<input class=button type='button' value='确 定' onclick=check() 宋体; font-size: 9pt; color: #000073; position: relative; height: 19'></form>";
        return $str;
    }
    
    ####################################
    ######## 对进行提交表单的验验 #########
    function check()
    {
       if (isNaN(go2to.page.value))
            echo "javascript:alert('请正确填写转到页数！');";
          else if (go2to.page.value==""){
            echo "javascript:alert('请输入转到页数！');";
         }
       else{
            go2to.submit();
       }
    }

    function getNums(){       //每页最初的记录数
        return $this->nums;
    }
    
    function getOnepage(){        //每页实际条数
        return $this->onepage;
    }

    function getI(){      //暂未用
    //    $this->i=$this-pageone*($this->page-1)
        return $this->i;
    }
    
    function getPage(){
        return $this->page;
    }

    function getMess($error){        //定制消息
        echo"<center>$error</center>";
        exit;
    }
}
?>

<?php
// 测试程序
      $pg=new Pages();
      $pg->getConnect("dsn","user","password");
      $pg->getTotal("select count(*) as total from bul_file");            //连学生表求总数
      $pg->getList($sql,3,$page);
      if($pg->getNums()!=0){
         for($i=0;$i<$pg->getNums();$pg->getfetch_row($pg->dList),$i++);        //同上
      }
      echo "<table width=\"400\" border=1 cellspacing=\"0\" cellpadding=\"0\" bordercolordark=\"#FFFFFF\" bordercolorlight=\"#000000\">";
      echo $pg->getFanye();
      echo "</td></tr></table>";
      echo "<table width=\"400\" border=\"1\" cellspacing=\"0\" cellpadding=\"0\" bordercolordark=\"#FFFFFF\" bordercolorlight=\"#000000\">";
      echo "<tr bgcolor=\"#CCFF99\"><td width=\"5%\"><font face=\"隶书\" size=\"4\"><div align=\"center\">ID</div></font></td>      <td width=\"50%\"><font face=\"隶书\" size=\"4\"><div align=\"center\">标题</div></font></td>        <td width=\"30%\"><font face=\"隶书\" size=\"4\"><div align='center'>日期</div></font></td>       </tr>\";
        $i=1;
      while($pg->getfetch_row($pg->dList)){
           $pg->getNums();
           echo "<tr><td width=\"5%\">".($pg->nums+$i)."</a></td><td width=\"50%\"><div align='center'><a href=\"list_bul.php?id=".$pg->getresult($pg->dList,1)."\" target=\"left\">".$pg->getresult($pg->dList,2)."</a></div></td><td width=\"30%\"><div align='center'>".substr($pg->getresult($pg->dList,4),1,10)."</div></td></tr>";
           if($i==$pg->getOnepage()){        //跳出循环
                break;
       }
      $i++;
?>