一. 关于Uploadify
Uploadify是一个jQuery插件，你可以很容易的为你的网站添加多个文件上传功能。有两个不同的版本（HTML5和Flash）允许你灵活选择为您的网站和回退方法正确实施使其降解优雅。
二. 问题整理
问题1：页面报插件的图片找不到
遇到这个问题，很明显是相关文件中引用的路径不正确。
找到下边这个文件，修改相关路径为正确的路径。
问题2：页面报net::ERR_NAME_NOT_RESOLVED
找到下边这个文件
在插件主文件查找
1 this.settings.button_image_url=SWFUpload.completeURL(this.settings.button_image_url);
将其改为：
1 if(this.settings.button_image_url!=""){2 ????this.settings.button_image_url=SWFUpload.completeURL(this.settings.button_image_url);3 }注意：此处要粘贴复制不要使用vs的自带替换功能，避免将其他代码错误替换。
问题3：服务器传session
首先在Global.asax配置文件下添加两个获取session方法
方法1：
1 protected void Application_BeginRequest(object sender, EventArgs e) 2 ????????{ 3 ????????????/* we guess at this point session is not already retrieved by application so we recreate cookie with the session id... */ 4 ????????????try 5 ????????????{ 6 ????????????????string session_param_name = "ASPSESSID"; 7 ????????????????string session_cookie_name = "ASP.NET_SessionId"; 8 ?9 ????????????????if (HttpContext.Current.Request.Form[session_param_name] != null)10 ????????????????{11 ????????????????????UpdateCookie(session_cookie_name, HttpContext.Current.Request.Form[session_param_name]);12 ????????????????}13 ????????????????else if (HttpContext.Current.Request.QueryString[session_param_name] != null)14 ????????????????{15 ????????????????????UpdateCookie(session_cookie_name, HttpContext.Current.Request.QueryString[session_param_name]);16 ????????????????}17 ????????????}18 ????????????catch19 ????????????{20 ????????????}21 22 ????????????try23 ????????????{24 ????????????????string auth_param_name = "AUTHID";25 ????????????????string auth_cookie_name = FormsAuthentication.FormsCookieName;26 27 ????????????????if (HttpContext.Current.Request.Form[auth_param_name] != null)28 ????????????????{29 ????????????????????UpdateCookie(auth_cookie_name, HttpContext.Current.Request.Form[auth_param_name]);30 ????????????????}31 ????????????????else if (HttpContext.Current.Request.QueryString[auth_param_name] != null)32 ????????????????{33 ????????????????????UpdateCookie(auth_cookie_name, HttpContext.Current.Request.QueryString[auth_param_name]);34 ????????????????}35 36 ????????????}37 ????????????catch38 ????????????{39 ????????????}40 ????????}方法2：
1 ????????private void UpdateCookie(string cookie_name, string cookie_value) 2 ????????{ 3 ????????????HttpCookie cookie = HttpContext.Current.Request.Cookies.Get(cookie_name); 4 ????????????if (null == cookie) 5 ????????????{ 6 ????????????????cookie = new HttpCookie(cookie_name); 7 ????????????} 8 ????????????cookie.Value = cookie_value; 9 ????????????HttpContext.Current.Request.Cookies.Set(cookie);10 ????????}在使用的界面添加取值操作，要添加在使用插件的上面（这里使用C#中的 @符号在页面中获取，并作为JS代码中的全局变量）
1 var auth = "@(Request.Cookies[FormsAuthentication.FormsCookieName]==null ? string.Empty : Request.Cookies[FormsAuthentication.FormsCookieName].Value)";2 var ASPSESSID = "@Session.SessionID";
然后在插件的formData里面写入：
1 ‘folder‘: ‘/Upload‘, ‘ASPSESSID‘: ASPSESSID, ‘AUTHID‘: auth
整个效果如下：
1 ????<link href="~/Content/uploadify/uploadify.css" rel="stylesheet" /> 2 ????<script src="~/Content/uploadify/jquery.uploadify.min.js"></script> 3 ????<script type="text/javascript"> 4 ????????//上传图片 5 ????????$(function () { 6 ????????????var auth = "@(Request.Cookies[FormsAuthentication.FormsCookieName]==null ? string.Empty : Request.Cookies[FormsAuthentication.FormsCookieName].Value)"; 7 ????????????var ASPSESSID = "@Session.SessionID"; 8 ????????????$("#btnUpload").uploadify({ 9 ????????????????buttonText: ‘上传图片‘,10 ????????????????height: 20,11 ????????????????width: 120,12 ????????????????swf: ‘/Content/uploadify/uploadify.swf‘,13 ????????????????uploader: ‘/Back_Areas/PhotoSlider/Upload‘,//通过后台的程序把文件上传到服务器14 ????????????????multi: false,//是否允许同时选择多个文件15 ????????????????fileSizeLimit: ‘8MB‘,//文件大小16 ????????????????fileTypeExts: ‘*.gif;*.png;*.jpg;*jpeg‘,//可选文件的扩展名17 ????????????????formData: {18 ????????????????????‘folder‘: ‘/Upload‘, ‘ASPSESSID‘: ASPSESSID, ‘AUTHID‘: auth//测试19 ????????????????},20 ????????????????onUploadSuccess: function (file, data, response) {21 ????????????????????var jsonData = $.parseJSON(data);22 ????????????????????$.procAjaxMsg(jsonData, function () {23 ????????????????????????$.alertMsg(jsonData.Msg, ‘操作提示‘, function () {24 ????????????????????????????$("#uImgUrl").attr("src", jsonData.BackUrl);25 ????????????????????????????$("#h_uImgUrl").val(jsonData.BackUrl);26 ????????????????????????});27 ????????????????????}, function () {28 ????????????????????????$.alertMsg(jsonData.Msg, ‘操作提示‘, null);29 ????????????????????});30 ????????????????},31 ????????????????onUploadError: function (file, errorCode, errorMsg, errorString) {32 ????????????????????$.alertMsg(‘文件 ‘ + file.name + ‘ 上传失败: ‘ + errorString, ‘上传失败‘, null);33 ????????????????},34 ????????????????onSelectError: function (file, errorCode, errorMsg, errorString) {35 ????????????????????$.alertMsg(‘文件 ‘ + file.name + ‘ 不能被上传: ‘ + errorString, ‘选择失效‘, null);36 ????????????????}37 38 ????????????});39 ????????});40 41 ????</script>【原创】MVC项目中使用JQuery的upladify图片上传插件相关问题的解决方案
原文地址：https://www.cnblogs.com/lichunting/p/9268996.html