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',
 ),
 ),
)); ?>

优点: 可以使用自带的样式; 缺点: 效率略低.

以上就是本文的全部内容，希望对大家的学习有所帮助，也希望大家多多支持脚本之家。