如何在ajax文件上传中显示进度条
问题描述:
我的代码发布了ajax请求,但没有显示进度条。请帮助更正代码以显示工作进度栏。如何在ajax文件上传中显示进度条
$(document).ready(function() {
$("#uploadbutton").click(function() {
var filename = $("#file_path$i").val(); //get form data;
$.ajax({
type: "html",
url: "share.php",//onwhich post ajax data;
enctype: 'multipart/form-data',
data: {
file: filename
},
success: function() {
alert("Data Uploaded: ");
}
});
});
});
答
这是BlueImp的jQuery的文件上传:
首先,下载:https://github.com/blueimp/jQuery-File-Upload/archives/master
现在,上传JS文件夹。
让您的.html:
<html>
<head>
<meta charset="utf-8">
<title>jQuery File Upload Example</title>
<style>
.bar {
height: 18px;
background: green;
}
</style>
</head>
<body>
<input id="fileupload" type="file" name="files[]" data-url="server/php/" multiple>
<div id="progress">
<div class="bar" style="width: 0%;"></div>
</div>
<script src="//ajax.googleapis.com/ajax/libs/jquery/1.8.3/jquery.min.js"></script>
<script src="js/vendor/jquery.ui.widget.js"></script>
<script src="js/jquery.iframe-transport.js"></script>
<script src="js/jquery.fileupload.js"></script>
<script>
$(function() {
$('#fileupload').fileupload({
dataType: 'json',
done: function (e, data) {
$.each(data.result.files, function (index, file) {
$('<p/>').text(file.name).appendTo(document.body);
});
}
});
progressall: function (e, data) {
var progress = parseInt(data.loaded/data.total * 100, 10);
$('#progress .bar').css(
'width',
progress + '%'
);
}
});
</script>
</body>
</html>
我没有测试过这一点,但它应该是功能。让我知道如果它不是。
可选:在您的.css文件中包含<style></style>
的内容。
可选:将.js包含在.js <script src=""></script>
标记中。
来源:https://github.com/blueimp/jQuery-File-Upload/wiki/Basic-plugin
答
@whitneyit:我们可以使用XHR:AJAX的功能来跟踪文件上传这样的事情
$.ajax({
url: 'handler/FileUploader.ashx?FileName=' + file.name, //server script to process data
type: 'POST',
xhr: function() {
myXhr = $.ajaxSettings.xhr();
if (myXhr.upload) {
myXhr.upload.addEventListener('progress', progressHandlingFunction, false);
}
return myXhr;
},
success: function (result) {
//On success if you want to perform some tasks.
},
data: file,
cache: false,
contentType: false,
processData: false
});
function progressHandlingFunction(e) {
if (e.lengthComputable) {
var s = parseInt((e.loaded/e.total) * 100);
$("#progress" + currFile).text(s + "%");
$("#progbarWidth" + currFile).width(s + "%");
if (s == 100) {
triggerNextFileUpload();
}
}
}