我可以使用以下jQuery代码使用ajax请求的POST方法执行文件上载吗？
$.ajax({
type: "POST",
timeout: 50000,
url: url,
data: dataString,
success: function (data) {
alert('success');
return false;
}
});
如果可能，我需要填写数据部分吗？这是正确的方式吗？我只将文件POST到服务器端。
我一直在搜索，但我发现的是一个插件，而在我的计划中，我不想使用它。至少目前是这样。
当前回答
使用FormData。它工作得很好：-）。。。
var jform = new FormData();
jform.append('user',$('#user').val());
jform.append('image',$('#image').get(0).files[0]); // Here's the important bit
$.ajax({
url: '/your-form-processing-page-url-here',
type: 'POST',
data: jform,
dataType: 'json',
mimeType: 'multipart/form-data', // this too
contentType: false,
cache: false,
processData: false,
success: function(data, status, jqXHR){
alert('Hooray! All is well.');
console.log(data);
console.log(status);
console.log(jqXHR);
},
error: function(jqXHR,status,error){
// Hopefully we should never reach here
console.log(jqXHR);
console.log(status);
console.log(error);
}
});
其他回答
<html>
<head>
<title>Ajax file upload</title>
<script src="http://ajax.googleapis.com/ajax/libs/jquery/1.11.1/jquery.min.js"></script>
<script>
$(document).ready(function (e) {
$("#uploadimage").on('submit', (function(e) {
e.preventDefault();
$.ajax({
url: "upload.php", // Url to which the request is send
type: "POST", // Type of request to be send, called as method
data: new FormData(this), // Data sent to server, a set of key/value pairs (i.e. form fields and values)
contentType: false, // The content type used when sending data to the server.
cache: false, // To unable request pages to be cached
processData:false, // To send DOMDocument or non processed data file it is set to false
success: function(data) // A function to be called if request succeeds
{
alert(data);
}
});
}));
</script>
</head>
<body>
<div class="main">
<h1>Ajax Image Upload</h1><br/>
<hr>
<form id="uploadimage" action="" method="post" enctype="multipart/form-data">
<div id="image_preview"><img id="previewing" src="noimage.png" /></div>
<hr id="line">
<div id="selectImage">
<label>Select Your Image</label><br/>
<input type="file" name="file" id="file" required />
<input type="submit" value="Upload" class="submit" />
</div>
</form>
</div>
</body>
</html>
我想到了一个主意：
Have an iframe on page and have a referencer.
具有将输入类型文件元素移动到的表单。
Form: A processing page AND a target of the FRAME.
结果将发布到iframe，然后您只需将获取的数据发送到所需的图像标签，如下所示：
data:image/png;base64,asdfasdfasdfasdfa
并加载页面。
我相信这对我来说是有效的，取决于你是否能够做到：
.aftersubmit(function(){
stopPropagation(); // or some other code which would prevent a refresh.
});
如果你想这样做：
$.upload( form.action, new FormData( myForm))
.progress( function( progressEvent, upload) {
if( progressEvent.lengthComputable) {
var percent = Math.round( progressEvent.loaded * 100 / progressEvent.total) + '%';
if( upload) {
console.log( percent + ' uploaded');
} else {
console.log( percent + ' downloaded');
}
}
})
.done( function() {
console.log( 'Finished upload');
});
比
https://github.com/lgersman/jquery.orangevolt-ampere/blob/master/src/jquery.upload.js
可能是您的解决方案。
var dataform = new FormData($("#myform")[0]);
//console.log(dataform);
$.ajax({
url: 'url',
type: 'POST',
data: dataform,
async: false,
success: function(res) {
response data;
},
cache: false,
contentType: false,
processData: false
});
您可以使用ajaxSubmit方法，如下所示：）当您选择需要上传到服务器的文件时，表单将提交到服务器：）
$(document).ready(function () {
var options = {
target: '#output', // target element(s) to be updated with server response
timeout: 30000,
error: function (jqXHR, textStatus) {
$('#output').html('have any error');
return false;
}
},
success: afterSuccess, // post-submit callback
resetForm: true
// reset the form after successful submit
};
$('#idOfInputFile').on('change', function () {
$('#idOfForm').ajaxSubmit(options);
// always return false to prevent standard browser submit and page navigation
return false;
});
});
