如何使用ajax发布上传文件同时我需要发一个字符串check = 1？ `data：fd +'＆check ='+ 1，`？ [重复]

Question

Possible Duplicate:
How can I upload files asynchronously with jQuery?

How to use ajax post a upload file sametime I need to post a string check = 1?
data: fd + '&check=' + 1, this is not work. any suggestion?

Thanks.

var uf =$('.formname');
var fd = new FormData(formname);    
$.ajax({
    type: "POST",
    url: 'http://example.com/script.php',
    data: fd,
    processData: false,
    contentType: false,
    success: function(data){
    }
});

php

if($_FILES && $_POST['check'] == 1)

Answer 1

You can use FormData.append to add a new set of values

var uf =$('.formname');
var fd = new FormData(uf[0]);
fd.append('check','1'); 
$.ajax({
    type: "POST",
    url: 'http://example.com/script.php',
    data: fd,
    processData: false,
    contentType: false,
    success: function(data){
    }
});