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
<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>
其他回答
这是我的代码
var formData = new FormData();
var files = $('input[type=file]');
for (var i = 0; i < files.length; i++) {
if (files[i].value == "" || files[i].value == null) {
return false;
}
else {
formData.append(files[i].name, files[i].files[0]);
}
}
var formSerializeArray = $("#Form").serializeArray();
for (var i = 0; i < formSerializeArray.length; i++) {
formData.append(formSerializeArray[i].name, formSerializeArray[i].value)
}
$.ajax({
type: 'POST',
data: formData,
contentType: false,
processData: false,
cache: false,
url: '/Controller/Action',
success: function (response) {
if (response.Success == true) {
return true;
}
else {
return false;
}
},
error: function () {
return false;
},
failure: function () {
return false;
}
});
无法通过AJAX上载文件。您可以上传文件，而无需使用IFrame刷新页面。您可以在此处查看更多详细信息。
更新
XHR2支持通过AJAX上传文件。例如，通过FormData对象，但遗憾的是，它不受所有/旧浏览器的支持。
FormData支持从以下桌面浏览器版本开始。
即10+Firefox 4.0+铬7+Safari 5+歌剧12+
有关详细信息，请参阅MDN链接。
$("#submit_car").click(function() {
var formData = new FormData($('#car_cost_form')[0]);
$.ajax({
url: 'car_costs.php',
data: formData,
contentType: false,
processData: false,
cache: false,
type: 'POST',
success: function(data) {
// ...
},
});
});
编辑：注释内容类型和过程数据您可以简单地使用它通过Ajax上传文件。。。。。。提交输入不能在表单元素之外：）
要上载用户使用jquery作为表单一部分提交的文件，请遵循以下代码：
var formData = new FormData();
formData.append("userfile", fileInputElement.files[0]);
然后将表单数据对象发送到服务器。
我们还可以将文件或Blob直接附加到FormData对象。
data.append("myfile", myBlob, "filename.txt");
通过ajax上传文件不再需要Iframes。我最近自己做过。查看以下页面：
使用AJAX和jQuery上传HTML5文件
http://dev.w3.org/2006/webapi/FileAPI/#FileReader-界面
更新了答案并进行了清理。使用getSize函数检查大小或使用getType函数检查类型。添加了progressbar html和css代码。
var Upload = function (file) {
this.file = file;
};
Upload.prototype.getType = function() {
return this.file.type;
};
Upload.prototype.getSize = function() {
return this.file.size;
};
Upload.prototype.getName = function() {
return this.file.name;
};
Upload.prototype.doUpload = function () {
var that = this;
var formData = new FormData();
// add assoc key values, this will be posts values
formData.append("file", this.file, this.getName());
formData.append("upload_file", true);
$.ajax({
type: "POST",
url: "script",
xhr: function () {
var myXhr = $.ajaxSettings.xhr();
if (myXhr.upload) {
myXhr.upload.addEventListener('progress', that.progressHandling, false);
}
return myXhr;
},
success: function (data) {
// your callback here
},
error: function (error) {
// handle error
},
async: true,
data: formData,
cache: false,
contentType: false,
processData: false,
timeout: 60000
});
};
Upload.prototype.progressHandling = function (event) {
var percent = 0;
var position = event.loaded || event.position;
var total = event.total;
var progress_bar_id = "#progress-wrp";
if (event.lengthComputable) {
percent = Math.ceil(position / total * 100);
}
// update progressbars classes so it fits your code
$(progress_bar_id + " .progress-bar").css("width", +percent + "%");
$(progress_bar_id + " .status").text(percent + "%");
};
如何使用Upload类
//Change id to your id
$("#ingredient_file").on("change", function (e) {
var file = $(this)[0].files[0];
var upload = new Upload(file);
// maby check size or type here with upload.getSize() and upload.getType()
// execute upload
upload.doUpload();
});
Progressbar html代码
<div id="progress-wrp">
<div class="progress-bar"></div>
<div class="status">0%</div>
</div>
Progressbar css代码
#progress-wrp {
border: 1px solid #0099CC;
padding: 1px;
position: relative;
height: 30px;
border-radius: 3px;
margin: 10px;
text-align: left;
background: #fff;
box-shadow: inset 1px 3px 6px rgba(0, 0, 0, 0.12);
}
#progress-wrp .progress-bar {
height: 100%;
border-radius: 3px;
background-color: #f39ac7;
width: 0;
box-shadow: inset 1px 1px 10px rgba(0, 0, 0, 0.11);
}
#progress-wrp .status {
top: 3px;
left: 50%;
position: absolute;
display: inline-block;
color: #000000;
}
