Yii 分页器Pagesize的设置方法

public function search()
	{
		// @todo Please modify the following code to remove attributes that should not be searched.

		$criteria=new CDbCriteria;
                
                if(!isset($_GET["Testlogs_sort"])){
                    //增加的代码，按ID号降序排列;
                    $criteria->order="test_id desc";
		}


		$criteria->compare("test_id",$this->test_id,true);
		$criteria->compare("test_msg",$this->test_msg,true);
		$criteria->compare("test_create_time",$this->test_create_time);

		return new CActiveDataProvider($this, array(
			"criteria"=>$criteria,
                        "pagination"=>array(
                            "pageSize"=>20
                        )
		));
	}