详解Yii实现分页的两种方法

Yii实现分页的两种方法,一种是用DAO实现,另外一种是在widget实现.

各有优点吧,第一种效率会高一点, 第二种可以使用自带的表格,方便一些.

一. DAO实现分页.

 [Controller层]

public function actionReport()  {    $sql = "select remitdate, sum(rate) sumrate from td_delivery       group by remitdate       order by remitdate desc";    $criteria=new CDbCriteria();    $result = Yii::app()->db->createCommand($sql)->query();    $pages=new CPagination($result->rowCount);    $pages->pageSize=2;     $pages->applyLimit($criteria);     $result=Yii::app()->db->createCommand($sql." LIMIT :offset,:limit");     $result->bindValue(':offset', $pages->currentPage*$pages->pageSize);     $result->bindValue(':limit', $pages->pageSize);     $posts=$result->query();    $this->render('report',array(         'posts'=>$posts,         'pages'=>$pages,     ));  }

 [View层]

 <?php foreach($posts as $row):?>  <?php echo CHtml::link($row["remitdate"],array('delivery/view','remitdate'=>$row["sumrate"]));?>  <?php echo $row["sumrate"]."<br />" ?> <?php endforeach;?> <?php  //分页widget代码:  $this->widget('CLinkPager',array('pages'=>$pages)); ?>

优点: DAO效率高; 缺点: view层需要自己写一些样式,稍显麻烦一点

二. widget实现分页

[model层]

/**   * @var string attribute : 日运费 (统计用)   * 需要对新增加的字段做个声明   */  public $dayrate;  /*   * 统计功能: 统计每日的运费   */  public function statistics()  {    $criteria = new CDbCriteria;    $criteria->select = 'remitdate, sum(rate) AS dayrate';    $criteria->group = 'remitdate';        return new CActiveDataProvider(get_class($this), array(      'criteria'=>$criteria,      'sort'=>array(        // 表头设置点击排序的字段        'attributes'=>array(          'remitdate',          'dayrate'=>array(            'asc'=>'dayrate',            'desc'=>'dayrate DESC',          )        ),        'defaultOrder'=>'remitdate desc',      ),    ));    }

[Controller层]

/**   * 运单统计功能:   * 按日期统计   */  public function actionReport()  {    $model=new Delivery('statistics');    $model->unsetAttributes(); // clear any default values         $this->render('report',array(      'model'=>$model,    ));  }

 [View层]

 <?php $this->widget('zii.widgets.grid.CGridView', array(  'id'=>'delivery-grid',  'dataProvider'=>$model->statistics(),  'filter'=>$model,  'columns'=>array(    'remitdate',    'dayrate',    array(      'class'=>'CButtonColumn',    ),  ),)); ?>