$.ajaxFileUpload({url: '/WxManage/Media/UploadImage', //用于文件上传的服务器端请求地址secureuri: false, //是否需要安全协议，一般设置为falsefileElementId: 'postFile', //文件上传域的IDtype:"post",dataType: 'json', //返回值类型 一般设置为jsonsuccess: function(data, status) //服务器成功响应处理函数
            {CloseProgressbar();//关闭进度条 设置进度条进度为100if (data.status == 1) {layer.msg(data.msg, { icon: 1, time: 1000 },function() {parent.location.reload();});} else {$("#btnUploadFile").attr("disabled", false);layer.msg(data.msg, { icon: 2, time: 1000 });   }},error: function(data, status, e) //服务器响应失败处理函数
            {$("#btnUploadFile").attr("disabled", false);CloseProgressbar();layer.closeAll("dialog");layer.msg("上传失败", { icon: 2, time: 1000 });}});

 1 [HttpPost]
 2         public ActionResult UploadImage(HttpPostedFileBase postFile)
 3         {
 4             if (postFile == null)
 5             {
 6                 return Json(BasicConfig.MessageConfig.Fail("上传文件不得为空"));
 7             }
 8
 9             try
10             {
11                 string format = postFile.FileName.Split('.').Last();//后缀名
12                 SaveFile(postFile);
13                 return Json(BasicConfig.MessageConfig.Success("上传成功"));
14             }
15             catch (Exception ex)
16             {
17                 return Json(BasicConfig.MessageConfig.Fail("上传失败"));
18             }
19         }

 1                 FileStream fs = new FileStream(fileSavePath, FileMode.Create);
 2                 BinaryWriter bw = new BinaryWriter(fs);
 3                 BinaryReader br = new BinaryReader(postFile[i].InputStream);
 4
 5                 int readCount = 0;//单次读取的字节数
 6                 while ((readCount = br.Read(bufferByte, 0, readBufferSize)) > 0)
 7                 {
 8                     bw.Write(bufferByte, 0, readCount);//写入字节到文件流
 9                     bw.Flush();
10                     saveCount += readCount;//已经上传的进度
11                     mem.SetValue("Admin_UploadSpeed_" + Session.SessionID, (saveCount * 1.0 / totalCount).ToString("0.00"), 60);//将更新到memcached缓存中
12                     Thread.Sleep(200);//为了看到明显的过程故意暂停
13                 }