<?
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

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);
 }
}

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;
}

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呢？
 return $this->total;
}

function getList($sql,$onepage,$page){
 $this->s=$sql;
 $this->onepage=$onepage;
 $this->page=$page;
 $this->dList=$this->getDo($this->s); //连接表的游标
 $this->pages=ceil($this->total/$this->onepage);
 if($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)*$this->onepage;
 //if($this->nums!=0){
 // for($this->i=0;$this->i<$pg->getNums();odbc_fetch_row($this->dd),$this->i++);//同上
 //}
 //$this->i=0;//为何这部分不能封装？
 return $this->dList;
}

function getFanye(){
 $str="";
 if($this->page!=1)
 $str.="<a href=".$PHP_SELF."?page=1> 首页 </a><a href=".$PHP_SELF."?page=".$this->fre."> 前页 </a>";
 else
 $str.="首页前页";
 if($this->page<$this->pages)
 $str.="<a href=".$PHP_SELF."?page=".$this->nxt."> 后页 </a>";
 else
 $str.=" 后页 ";
 if($this->page!=$this->pages)
 $str.="<a href=".$PHP_SELF."?page=".$this->pages."> 尾页 </a>";
 else
 $str.=" 尾页 ";

 $str.="共".$this->pages."页";
 $str.="您正浏览第".$this->page."页";
 return $str;
}

function getNums(){
 return $this->nums;
}

function getOnepage(){//每页实际条数
 return $this->onepage;
}

function getI(){
 return $this->i;
}

function getPage(){
 return $this->page;
}

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

$pg=new Pages();
$pg->getConnect("lei","sa","star");
$pg->getTotal("select count(*) as total from xs"); //连学生表求总数
$pg->getList("select xs_name from xs order by xs_id",8,$page);
if($pg->getNums()!=0){
for($i=0;$i<$pg->getNums();odbc_fetch_row($pg->dList),$i++);//同上
}
$i=0;
while(odbc_fetch_row($pg->dList)){
$name=odbc_result($pg->dList,"xs_name");
echo $name." ";
if($i==$pg->getOnepage()){//跳出循环
 break;
}
$i++;
}
echo$pg->getFanye();
?>

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