1.利用Jquery使用HTML5的FormData属性实现对文件的上传
在HTML5以前我们如果需要实现文件上传服务器等功能的时候,有时候我们不得不依赖于FLASH去实现,而在HTML5到来之后,我们很容易的实现对文件的上传,只需要利用HTML5的一个FormData属性,结合Jquery就很容易实现文件的上传,而且读取文件的上传进度,下面这个上传案例就是基于上面所说的实现的,下面我将所所有的JS和CSS以及HTML页面代码放在下面。
注意事项:FormData属性必须依赖于HTML5,所以如果你按照本文代码实现的功能,则浏览器必须升级为最新(支持HTML5 FormData属性)。
2.HTML页面代码如下
<!DOCTYPE html>
<html lang=\"en\" xmlns=\"http://www.w3.org/1999/xhtml\">
<head>
<meta charset=\"utf-8\" />
<title>使用HTML的FormData属性实现文件上传</title>
<link rel=\"stylesheet\" href=\"../css/fileUpload.css\" />
</head>
<body>
<table id=\"uploadTable\" style=\"border: 1px;\"></table>
<br/>
<a href=\"javascript:void(0);\" class=\"input-file\">
添加文件<input type=\"file\" id=\"txtFile\" style=\"width:200px;\" />
</a>
<script type=\"text/javascript\" src=\"../js/jquery-1.7.1-min.js\"></script>
<script type=\"text/javascript\">
$(function () {
$(\'#uploadTable\').SalesMOUNDUpload({
saveUrl: \'/Test/Save\',
jqInput: $(\'#txtFile\'),
fnRemove: removeFile,
fnComplete: function (d) {
window.console.log(\'complete \' + d);
}
});
});
function removeFile(d) {
$.post(\'/Test/Remove\', { \"filename\": d }, function(r) {
});
}
</script>
</body>
</html>
3.CSS代码如下:
/*源文件头信息:
<copyright file=\"FileUpload.js\">
Copyright(c)2014-2034 Kencery.All rights reserved.
个人博客:http://www.cnblogs.com/hanyinglong
创建人:韩迎龙(kencery)
创建时间:2015-6-24
</copyright>*/
body
{
font-family: \"微软雅黑\";
font-size: 12px;
}
.input-file {
overflow: hidden;
position: relative;
}
.input-file input {
opacity: 0;
filter: alpha(opacity=0);
font-size: 100px;
position: absolute;
top: 0;
right: 0;
}
#uploadTable {
width: 500px;
border-collapse: collapse;
border: 1px solid Silver;
}
4.JS代码如下:
// 源文件头信息:
// <copyright file=\"FileUpload.js\">
// Copyright(c)2014-2034 Kencery.All rights reserved.
// 创建人:韩迎龙(kencery)
// 创建时间:2015-6-24
// </copyright>
;
(function($) {
$.fn.SalesMOUNDUpload = function(options) {
var defaults =
{
saveUrl: \'\',
jqInput: \'\',
maxSize: 1024 * 1024 * 100, //100M
fnRemove: \'\', //移除文件 ,参数:文件名
fnComplete: \'\' //每个文件成功 ,参数:服务器端返回内容
};
var opt = $.extend(defaults, options);
function getByteToM(val) {
if (isNaN(val)) return val;
val = val / (1024 * 1024);
val = Math.round(val * 100) / 100;
return val;
}
return this.each(function() {
var $this = $(this);
$this.empty();
if (typeof FormData == \'undefine\') {
alert(\'浏览器版本太低,不支持改上传!\');
return;
}
//表头
if ($this.find(\'thead\').length == 0) {
var $thead = $(\'<thead>\');
var $th_tr = $(\'<tr>\');
$th_tr.append(\'<th>文件名</th>\');
$th_tr.append(\'<th>类型</th>\');
$th_tr.append(\'<th>大小</th>\');
$th_tr.append(\'<th>状态</th>\');
$th_tr.append(\'<th>操作</th>\');
$th_tr.appendTo($thead);
$this.append($thead);
}
opt.jqInput[0].addEventListener(\'change\', function(e) {
var file = this.files[0];
if (!file) {
return;
}
if (file.size > opt.maxSize) {
window.alert(\'文件超过最大\');
return;
}
var fd = new FormData();
var $table = $this;
fd.append(\"uploadFile\", file);
var xhr = new XMLHttpRequest();
xhr.open(\'POST\', opt.saveUrl, true);
xhr.upload.addEventListener(\"progress\", uploadProgress, false);
xhr.addEventListener(\"load\", uploadComplete, false);
xhr.addEventListener(\"error\", uploadFailed, false);
xhr.addEventListener(\"abort\", uploadCanceled, false);
//表中内容
var $tr = $(\'<tr>\');
$tr.append(\'<td class=\"upload_name\">\' + file.name + \'</td>\');
$tr.append(\'<td class=\"upload_type\">\' + file.type + \'</td>\');
$tr.append(\'<td class=\"upload_size\">\' + getByteToM(file.size) + \'M\' + \'</td>\');
$tr.append(\'<td class=\"upload_status\">\' + 0 + \'</td>\');
$tr.append(\'<td class=\"upload_action\"><a href=\"javascript:void(0);\">\' + \'取消\' + \'</a></td>\');
$tr.find(\'.upload_action a\').unbind(\'click\').bind(\'click\', function() {
xhr.abort();
});
$table.append($tr);
function uploadProgress(evt) {
if (evt.lengthComputable) {
var percentComplete = Math.round(evt.loaded * 100 / evt.total);
$tr.find(\'.upload_status\').html(Math.round(percentComplete) + \'%\');
} else {
$tr.find(\'.upload_status\').html(\'unable to compute\');
}
}
function uploadComplete(evt) {
if (evt.target.status == 200) {
$tr.find(\'.upload_status\').html(\'已完成\');
$tr.find(\'.upload_action a\').html(\'删除\');
if (typeof opt.fnComplete == \'function\') {
opt.fnComplete(evt.target.response);
}
$tr.find(\'.upload_action\').unbind(\'click\').bind(\'click\', removeFile);
}
}
function uploadFailed() {
$tr.find(\'.upload_status\').html(\'<a href=\"javascript:void(0);\">×</a>\');
$tr.find(\'.upload_status a\').unbind(\'click\').bind(\'click\', function() {
$tr.remove();
});
$tr.find(\'.upload_action a\').html(\'重试\');
$tr.find(\'.upload_action a\').unbind(\'click\').bind(\'click\', function() {
xhr.send(fd);
});
}
function uploadCanceled() {
$tr.remove();
}
function removeFile() {
$tr.remove();
if (typeof opt.fnRemove == \'function\') {
opt.fnRemove(file.name);
}
}
xhr.send(fd);
}, false);
});
};
}(jQuery));
5.代码查看地址:https://github.com/kencery/Common/tree/master/KenceryCommonMethod/%E6%96%87%E4%BB%B6%E4%B8%8A%E4%BC%A0
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