jQuery Ajax submit a multipart form
By：Roy.LiuLast updated：2019-08-11
A simple jQuery Ajax example to show you how to submit a multipart form, using Javascript FormData and $.ajax()
1. HTML
A HTML form for multiple file uploads and an extra field.
<!DOCTYPE html>
<html>
<body>
<h1>jQuery Ajax submit Multipart form</h1>
<form method="POST" enctype="multipart/form-data" id="fileUploadForm">
<input type="text" name="extraField"/><br/><br/>
<input type="file" name="files"/><br/><br/>
<input type="file" name="files"/><br/><br/>
<input type="submit" value="Submit" id="btnSubmit"/>
</form>
<h1>Ajax Post Result</h1>
<span id="result"></span>
<script src="https://ajax.googleapis.com/ajax/libs/jquery/2.2.4/jquery.min.js"></script>
</body>
</html>
2. jQuery.ajax
2.1 Create a Javascript FormData object from a form.
var form = $('#fileUploadForm')[0];
var data = new FormData(form);
2.1 processData: false, it prevent jQuery form transforming the data into a query string
$.ajax({
type: "POST",
enctype: 'multipart/form-data',
processData: false, // Important!
contentType: false,
cache: false,
2.3 Full example.
$(document).ready(function () {
$("#btnSubmit").click(function (event) {
//stop submit the form, we will post it manually.
event.preventDefault();
// Get form
var form = $('#fileUploadForm')[0];
// Create an FormData object
var data = new FormData(form);
// If you want to add an extra field for the FormData
data.append("CustomField", "This is some extra data, testing");
// disabled the submit button
$("#btnSubmit").prop("disabled", true);
$.ajax({
type: "POST",
enctype: 'multipart/form-data',
url: "/api/upload/multi",
data: data,
processData: false,
contentType: false,
cache: false,
timeout: 600000,
success: function (data) {
$("#result").text(data);
console.log("SUCCESS : ", data);
$("#btnSubmit").prop("disabled", false);
},
error: function (e) {
$("#result").text(e.responseText);
console.log("ERROR : ", e);
$("#btnSubmit").prop("disabled", false);
});
});
});
References
From：一号门
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