My MVC3 Summary <Uploadify控件>

1.添加Uploadify控件的相关文件

2.在要用到控件的视图里添加引用

3.JS代码

 $(document).ready(function () {
            //上传
            $('#file_upload').uploadify({
                'uploader': '/Scripts/upload/uploadify.swf', //按钮
              'script': '/upload/img?immediate=1',//处理方法(控制器)
                'cancelImg': '/Scripts/upload/cancel.png',//取消
                'folder': '/upload',//上传到文件夹(自己创建)
                'fileExt': '*.jpg;*.gif;*.png',//格式
                'fileDesc': 'Image Files (.JPG, .GIF, .PNG)',//描述
                'removeCompleted': true,
                'sizeLimit': 102400 * 10,//大小限制
                'onComplete': resultfun //完成则执行以下方法(自定义)
            });
            $("#btnUpload").click(function () {//点击上传前要判断
                if (checkImport()) {//执行判断的方法(自定义)
                    $('#file_upload').uploadifyUpload();//执行上传
                }
            });
        });
        function resultfun(event, queueID, fileObj, response, data) {
            if (response != "") {
                var dd = eval("(" + response + ")"); //转换 
                if (dd.msg.err == undefined) {
                    var imgsul = dd.msg.url.replace("!", "")
                   // $("#image_url").val(imgsul);
                    $("#imgDiv").attr("src", imgsul);//实现预览效果
                    // $("#result").html("图片上传成功!");
                    alert("成功上传!");
                }
            }
            else {
                alert("图片上传出错!");
            }
        }
        function checkImport() {
            if ($.trim($('#file_uploadQueue').html()) == "") {
                alert('请先选择要上传的的文件！');
                return false;
            }
            return true;
        }

4.处理方法(控制器)

using System;
using System.Collections.Generic;
using System.Linq;
using System.Web;
using System.Web.Mvc;
using System.Text.RegularExpressions;
using System.IO; //一定要应用IO命名空间

namespace webcourse.Controllers
{
    public class UploadController : Controller
    {
        //控制器名称:Img
// GET: /Upload/

        [HttpPost]//post 方式
     public ActionResult Img(HttpPostedFileBase fileData)//传参
        {
            Response.Charset = "UTF-8";
            // 初始化一大堆变量
//string inputname = "filedata";//表单文件域name
           string attachdir = "/upload";// 上传文件保存路径，结尾不要带/
            int dirtype = 1; // 1:按天存入目录 2:按月存入目录 3:按扩展名存目录  建议使用按天存
            int maxattachsize = 2097152;     // 最大上传大小，默认是2M
            string upext = "txt,rar,zip,jpg,jpeg,gif,png,swf,wmv,avi,wma,mp3,mid";    // 上传扩展名
            int msgtype = 2;                 //返回上传参数的格式：1，只返回url，2，返回参数数组
            string immediate = Request.QueryString["immediate"];//立即上传模式，仅为演示用
            byte[] file;                     // 统一转换为byte数组处理
            string localname = "";
            string disposition = Request.ServerVariables["HTTP_CONTENT_DISPOSITION"];

            string err = "";
            string msg = "''";

            if (disposition != null)
            {
                // HTML5上传
                file = Request.BinaryRead(Request.TotalBytes);
                localname = Server.UrlDecode(Regex.Match(disposition, "filename=\"(.+?)\"").Groups[1].Value);// 读取原始文件名
            }
            else
            {
                //HttpFileCollectionBase filecollection = Request.Files;
//HttpPostedFileBase fileData = filecollection.Get(inputname);

// 读取原始文件名
                localname = fileData.FileName;
                // 初始化byte长度.
                file = new Byte[fileData.ContentLength];

                // 转换为byte类型
                System.IO.Stream stream = fileData.InputStream;
                stream.Read(file, 0, fileData.ContentLength);
                stream.Close();

                //filecollection = null;
            }
            //if (Session["UserID"] == null) err = "登录超时，请登录后重试!";
//else
//{
                if (file.Length == 0) err = "无数据提交";
                else
                {
                    if (file.Length > maxattachsize) err = "文件大小超过" + maxattachsize + "字节";
                    else
                    {
                        string attach_dir, attach_subdir, filename, extension, target;

                        // 取上载文件后缀名
                        extension = GetFileExt(localname);

                        if (("," + upext + ",").IndexOf("," + extension + ",") < 0) err = "上传文件扩展名必需为：" + upext;
                        else
                        {
                            switch (dirtype)
                            {
                                case 2:
                                    attach_subdir = "month_" + DateTime.Now.ToString("yyMM");
                                    break;
                                case 3:
                                    attach_subdir = "ext_" + extension;
                                    break;
                                default:
                                    attach_subdir = "day_" + DateTime.Now.ToString("yyMMdd");
                                    break;
                            }
                            attach_dir = attachdir + "/" + attach_subdir + "/";

                            // 生成随机文件名
                            Random random = new Random(DateTime.Now.Millisecond);
                            filename = DateTime.Now.ToString("yyyyMMddhhmmss") + random.Next(10000) + "." + extension;

                            target = attach_dir + filename;
                            try
                            {
                                CreateFolder(Server.MapPath("~/" + attach_dir));

                                System.IO.FileStream fs = new System.IO.FileStream(Server.MapPath("~/" + target), System.IO.FileMode.Create, System.IO.FileAccess.Write);
                                fs.Write(file, 0, file.Length);
                                fs.Flush();
                                fs.Close();
                            }
                            catch (Exception ex)
                            {
                                err = ex.Message.ToString();
                            }

                            // 立即模式判断
                            if (immediate == "1") target = "!" + target;
                            target = jsonString(target);
                            if (msgtype == 1) msg = "'" + target + "'";
                            else msg = "{'url':'" + target + "','localname':'" + jsonString(localname) + "','id':'1'}";
                        }
                    }
                }
                file = null;
            //}


//Response.Write("{'err':'" + jsonString(err) + "','msg':" + msg + "}");
            return this.Content("{'err':'" + jsonString(err) + "','msg':" + msg + "}");
        }


        string jsonString(string str)
        {
            str = str.Replace("\\", "\\\\");
            str = str.Replace("/", "\\/");
            str = str.Replace("'", "\\'");
            return str;
        }


        string GetFileExt(string FullPath)
        {
            if (FullPath != "") return FullPath.Substring(FullPath.LastIndexOf('.') + 1).ToLower();
            else return "";
        }
         //创建文件夹
        void CreateFolder(string FolderPath)
        {
            if (!System.IO.Directory.Exists(FolderPath)) System.IO.Directory.CreateDirectory(FolderPath);
        }
        [AcceptVerbs(HttpVerbs.Post)]
        public ContentResult Import(HttpPostedFileBase FileData, string folder, string name)
        {
            string result = "";
            if (null != FileData)
            {
                try
                {
                    string extension = Path.GetExtension(FileData.FileName).ToLower();//获得文件扩展名 
// 生成随机文件名 
                    Random random = new Random(DateTime.Now.Millisecond);
                    string filename = DateTime.Now.ToString("yyyyMMddhhmmss") + random.Next(10000) + "." + extension;

                    saveFile(FileData, filename);//保存文件        
                }
                catch
                {
                    result = "";
                }
            }
            return Content(result);
        }
        [NonAction]
        private void saveFile(HttpPostedFileBase postedFile, string saveName)
        {
            string phyPath = Request.MapPath("~/upload/img/");
            if (!Directory.Exists(phyPath))
            {
                Directory.CreateDirectory(phyPath);
            }
            try
            {
                postedFile.SaveAs(phyPath + saveName);
            }
            catch (Exception e)
            {
                throw new ApplicationException(e.Message);
            }
        }

    }
}

5.效果