id="form1"

name="form1">             
type="file"

name="fileToUpload"

id="fileToUpload" 

multiple="multiple"/>             
id="progressBar"

value="0"

max="100">             
id="percentage">             
type="button"

onclick="UpladFile()"

value="Upload"

/>  


type="text/javascript">      $(document).ready(function

() {              $('#form1').submit(function

() {                  var

formdata = new

FormData();                  var

fileObj = document.getElementById("fileToUpload2").files;                      for

(var

i = 0; i < fileObj.length; i++)                          formdata.append("file"

+ i, fileObj[i]);                      $.ajax({                              type: 'POST',                              url: '/Home/Upload2',                              data:
formdata,                              /**                                              *必须false才会自动加上正确的Content-Type                               */                             contentType: false,                              /**                              *
必须false才会避开jQuery对 formdata 的默认处理                              *
XMLHttpRequest会对 formdata 进行正确的处理                              */                             processData: false                     }).then(function

() {                              alert('done');                      }, function

() {                              //failCal                      });                      return

false;              });              });         function

ajaxUpload() {              $("#form1").submit();      }