yii上传图片、yii上传文件、yii控件activeFileField使用

public function rules()
{
// NOTE: you should only define rules for those attributes that
// will receive user inputs.
return array(
array('hits', 'numerical', 'integerOnly'=>true),
array('title', 'length', 'max'=>80),
array('linkurl', 'length', 'max'=>255),
array('imgpath','file','types'=>'jpg,gif,png','on'=>'insert'),
array('thumb','file','types'=>'jpg,gif,png','on'=>'insert'),
array('addtime', 'length', 'max'=>10),
// The following rule is used by search().
// Please remove those attributes that should not be searched.
array('aid, title, linkurl, addtime, hits', 'safe', 'on'=>'search'),
);
}

public function actionCreate()
{
$model=new Slide;

// Uncomment the following line if AJAX validation is needed
// $this->performAjaxValidation($model);

if(isset($_POST['Slide']))
{
$model->attributes=$_POST['Slide'];
$model->imgpath=CUploadedFile::getInstance($model,'imgpath');
$model->thumb=CUploadedFile::getInstance($model,'thumb');
if($model->imgpath)
{
$newimg = 'imgpath_'.time().'_'.rand(1, 9999).'.'.$model->imgpath->extensionName;
//根据时间戳重命名文件名,extensionName是获取文件的扩展名
$model->imgpath->saveAs('assets/uploads/slide/'.$newimg);
$model->imgpath = 'assets/uploads/slide/'.$newimg;
//将image属性重新命名
}
if($model->thumb)
{
$newthumb = 'thumb_'.time().'_'.rand(1, 9999).'.'.$model->thumb->extensionName;
$model->thumb->saveAs('assets/uploads/slide/'.$newthumb);
$model->thumb = 'assets/uploads/slide/'.$newthumb;
}
$model->addtime = time();
if($model->save())
$this->redirect(array('view','id'=>$model->aid));
}

$this->render('create',array(
'model'=>$model,
));
}

/**
* 修改
*/
public function actionUpdate($id)
{
$model=$this->loadModel($id);

// Uncomment the following line if AJAX validation is needed
// $this->performAjaxValidation($model);

if(isset($_POST['Slide']))
{
$model->attributes=$_POST['Slide'];
$model->imgpath=CUploadedFile::getInstance($model,'imgpath');
$model->thumb=CUploadedFile::getInstance($model,'thumb');
if($model->imgpath)
{
$newimg = 'imgpath_'.time().'_'.rand(1, 9999).'.'.$model->imgpath->extensionName;
//根据时间戳重命名文件名,extensionName是获取文件的扩展名
$model->imgpath->saveAs('assets/uploads/slide/'.$newimg);
$model->imgpath = 'assets/uploads/slide/'.$newimg;
//将image属性重新命名
} else {
$model->imgpath = $_POST['imgpath2'];
}
if($model->thumb)
{
$newthumb = 'thumb_'.time().'_'.rand(1, 9999).'.'.$model->thumb->extensionName;
$model->thumb->saveAs('assets/uploads/slide/'.$newthumb);
$model->thumb = 'assets/uploads/slide/'.$newthumb;
} else {
$model->thumb = $_POST['thumb2'];
}
$model->addtime = time();
if($model->save()) {
$this->redirect(array('view','id'=>$model->aid));
}
}

$this->render('update',array(
'model'=>$model,
));
}

<?php $form=$this->beginWidget('CActiveForm', array(
'id'=>'slide-form',
'enableAjaxValidation'=>true,
'htmlOptions'=>array('enctype'=>'multipart/form-data')
)); ?>

<table width="100%" cellspacing="0" class="table_form">
<tbody>
<tr>
<th width="100">广告标题：</th>
<td>
<?php echo $form->textField($model,'title',array('size'=>50,'maxlength'=>80)); ?>
<?php echo $form->error($model,'title'); ?>
</td>
</tr>
<tr>
<th>链接地址：</th>
<td>
<?php echo $form->textField($model,'linkurl',array('size'=>50,'maxlength'=>255)); ?>
<?php echo $form->error($model,'linkurl'); ?>
</td>
</tr>
</tbody>
</table>
<div style="" id="imagesdiv" class="pad-10">
<fieldset>
<legend>幻灯片设置</legend>
<table width="100%" class="table_form">
<tbody>
<tr>
<th width="80">上传图片：</th>
<td class="y-bg" style="width:250px;"><?php echo CHtml::activeFileField($model,'imgpath'); ?></td>
<td>

<?php echo '<img src="'.$model->imgpath.'"    width="20%"/>'; ?>
<?php if(!$model->isNewRecord){?>
<input type="hidden" name="imgpath2" id="hiddenField"    value="<?php echo $model->imgpath;?>"/>
<?php }?>
</td>
</tr>
</tbody>
</table>
</fieldset></div>
<div id="imagesdiv" class="pad-10">
<fieldset>
<legend>缩略图设置</legend>
<table width="100%" class="table_form">
<tbody>
<tr>
<th width="80">上传图片：</th>
<td class="y-bg" style="width:250px;"><?php echo CHtml::activeFileField($model,'thumb'); ?></td>
<td>
<?php echo '<img src="'.$model->thumb.'" />'; ?>
<?php if(!$model->isNewRecord){?>
<input type="hidden" name="thumb2" id="hiddenField"    value="<?php echo $model->thumb;?>"/>
<?php }?>
</td>
</tr>
</tbody>
</table>
</fieldset></div>
<div style="margin-left:10px; line-height:30px;" class="bk15">
<?php echo CHtml::submitButton($model->isNewRecord ? '确定' : '修改',array('class'=>'button')); ?>
<?php $this->endWidget(); ?>