MVC无刷新上传图片并显示

@{
ViewBag.Title = "Home Page";
}
<script src="../../Scripts/swfobject.js" type="text/javascript"></script>
<script src="../../Scripts/jquery.uploadify.v2.1.4.js" type="text/javascript"></script>
<link href="../../Content/uploadify.css" rel="stylesheet" type="text/css" />
<script type="text/javascript">
$(document).ready(function () {
$("#uploadify").uploadify({
'uploader': '/content/uploadify.swf',
'script': '/Home/Upload',
'cancelImg': '/content/cancel.png',
'folder': 'UploadFile',
'queueID': 'fileQueue',
'auto': false,
'multi': true,
'onComplete': function (event, ID, fileObj, response, data) {

$('#div_img').after("   <img src=" + response + " alt='' height='100' width='100' />")

}
});
});
</script>
<div id="div_img">
</div>
<div>
<div id="fileQueue" style="text-align: center">
</div>
<input type="file" name="uploadify" id="uploadify" />
<p>
<a href="javascript:$('#uploadify').uploadifyUpload()">上传</a>  <a href="javascript:$('#uploadify').uploadifyClearQueue()">
取消上传</a>
</p>
</div>

public string Upload(FormContext from)
{
var file = Request.Files["Filedata"];
string uploadPath = Server.MapPath("~/images/");
string url = "/images/" + file.FileName;
if (file != null)
{
file.SaveAs(uploadPath + file.FileName);

return url;//返回保存的地址
}
else
{
return "0";
}

}