jquery中怎么利用ajax实现文件上传功能

本篇文章为大家展示了jquery中怎么利用ajax实现文件上传功能，内容简明扼要并且容易理解，绝对能使你眼前一亮，通过这篇文章的详细介绍希望你能有所收获。

<form

id="form1"

name="form1">             <input

type="file"

name="fileToUpload"

id="fileToUpload" 

multiple="multiple"/>             <progress

id="progressBar"

value="0"

max="100"></progress>             <span

id="percentage"></span>             <input

type="button"

onclick="UpladFile()"

value="Upload"

/>  </form>


<script
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();      }  </script>

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