Uploadify是JQuery的一个上传插件,实现的效果非常不错,带进度显示。Uploadify官方网址:http://www.uploadify.com/,在MVC中使用的方法可以参考 jQuery Uploadify在ASP.NET MVC3中的使用 和 Asp.net Mvc中使用uploadify实现图片缩放保存。
本文是一个简单的介绍Demo,主要是动态传递参数方法:通过formdata 向处理程序传递额外的表单数据:
 代码如下:
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml">
<head runat="server">
    <title></title>
    <link href="uploadify/uploadify.css" type="text/css" rel="Stylesheet" />
    <script type="text/javascript" src="uploadify/jquery-1.7.2.min.js"></script>
    <script type="text/javascript" src="uploadify/swfobject.js"></script>
    <script type="text/javascript" src="uploadify/jquery.uploadify.min.js"></script>
    <script type="text/javascript">
        $(function () {
            var taskId = "<%= TaskID %>";
            var activityId = "<%= ActivityId %>";
            var userId = "<%= GetCurrentLoginUser().ID %>";
            $("#<%=FileUpload1.ClientID %>").uploadify(
            {
                'swf': 'uploadify/uploadify.swf',
                'uploader': 'UploadHandler.aspx',
                'auto': false,
                'method': 'post',
                'multi': true,
                'buttonText': '浏览',
                'buttonImg': 'uploadify/browse.jpg',
                'folder': '../uploadfile',
                'fileDesc': '附件',
                'onUploadStart': function (event, data) { //this is where you will send the form //data, but remember to get if from post in the .ashx file, by contex.Request["gallaryId"]            
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