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。