javascript 使用 jquery ajax 在同一个请求中上传文件和 JSON 数据？
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Uploading files and JSON data in the same request with jquery ajax?
提问by user1576748
I need to upload image file to canvas. Assuming the canvas already has objects, then I have to grab the json first, upload the image, and reload the page. The problem is, I can't send the uploaded image file together with json data in the same ajax request. Here is my code:
我需要将图像文件上传到画布。假设画布已经有对象，那么我必须先抓取json，上传图像，然后重新加载页面。问题是，我无法在同一个 ajax 请求中将上传的图像文件与 json 数据一起发送。这是我的代码：
<canvas id="canvas"></canvas>
<form enctype="multipart/form-data" id="myform" method="post" action="">
<input type="file" name="image" id="image" />
... (other input tags)
<button type="submit" id="upload">Upload</button>
</form>
$('#upload').bind("click",function(event) {
event.preventDefault();
var json = JSON.stringify(canvas.toDatalessObject());
var url = "upload.php";
var data = new FormData($('#myform')[0]);
var dataString = JSON.stringify(data.serializeObject());
$.post(url, { json: json, data: dataString }, 'json');
});
Whilst I get the json data just fine, the form data are just empty. Is there any other better solution?
虽然我得到的 json 数据很好，但表单数据只是空的。有没有其他更好的解决方案？
回答by Kevin Simple
remove
消除
var dataString = JSON.stringify(data.serializeObject());
,it's already Json,
, 已经是 Json,
and try to set ajax properties:
并尝试设置 ajax 属性：
processData: false,
contentType: false,
