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网页设计。