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一个odbc连mssql分页的类
2020-03-11 41人围观 0条评论
简介一个odbc连mssql分页的类

    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.=" 首页 前页 ";
                else
                    $str.="首页 前页";
            if($this->pagepages)
                $str.=" 后页 ";
                else
                    $str.=" 后页 ";
            if($this->page!=$this->pages)
                $str.=" 尾页 ";
                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($error){//定制消息
            echo"$error";
            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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