yii使用activeFileField控件实现上传文件与图片的方法

<&＃63;php $form=$this->beginWidget('CActiveForm', array(
'id'=>'books-form',
'enableAjaxValidation'=>false,
'htmlOptions'=>array('enctype'=>'multipart/form-data'),
));
&＃63;>

<&＃63;php echo $form->labelEx($model,'BookImg'); &＃63;>
<&＃63;php echo CHtml::activeFileField($model,'BookImg'); &＃63;>
<&＃63;php echo $form->error($model,'BookImg'); &＃63;>

<&＃63;php echo '图片预览' &＃63;>
<&＃63;php echo 'redirect(array('view','id'=>$model->BookId));
}

array('BookImg', 'file','allowEmpty'=>true,
'types'=>'jpg, gif, png',
'maxSize'=>1024 * 1024 * 1, // 1MB
'tooLarge'=>'The file was larger than 1MB. Please upload a smaller file.',
)