下载异步上传插件AjaxFileUploader，下载地址：http://phpletter.com/DOWNLOAD/
解压，保存在 asp.net mvc项目的一个文件夹下，如下图： 1. Controller层 public ActionResult View3() { return View(); } [HttpPost] public ActionResult View3(HttpPostedFileBase file) { if (file == null) { return Content("没有文件！", "text/plain"); } var fileName = Path.Combine(Request.MapPath("~/UploadFiles"), Path.GetFileName(file.FileName)); try { file.SaveAs(fileName); return Content("上传成功！", "text/plain"); } catch { return Content("上传异常 ！", "text/plain"); } } 2. View层： @{ Layout = null; } <!DOCTYPE html> <html> <head> <meta name="viewport" content="width=device-width" /> <title>View1</title> <script src=\'#\'" /Scripts/jquery-1.7.1.min.js"></script> <script src=\'#\'" /ajaxfileupload/jquery.js"></script> <script src=\'#\'" /ajaxfileupload/ajaxfileupload.js"></script> <script type="text/javascript"> function ajaxFileUploads() { $("#loading").ajaxStart(function () { $(this).show(); })//开始上传文件时显示一个图片 .ajaxComplete(function () { $(this).hide(); });//文件上传完成将图片隐藏起来 $.ajaxFileUpload({ url: '/Test/View3',//后台处理的action secureuri: false, fileElementId: 'file',//上传的控件名 dataType: 'text', success: function (data, status) { $("#mydiv").html( data); }, error: function (data, status, e) { $("#mydiv").html( data + " " + e); } }) return false; } </script> </head> <body> <input type="file" id="file" name="file" /> <img src=\'#\'" /ajaxfileupload/loading.gif" width="20px" height="20px" id="loading" style="display: none;"> <span id="mydiv" style="color: green;"></span> <br /> <input type="button" value="上传" ajaxFileUploads();"> </body> </html>本文出自 “桂素伟” 博客，请务必保留此出处http://axzxs.blog.51cto.com/730810/1006272