1. Gunakan Jquery untuk menggunakan atribut FormData HTML5 untuk memuat naik fail
Sebelum HTML5, jika kami perlu melaksanakan fungsi seperti pelayan muat naik fail, kadangkala kami terpaksa bergantung pada FLASH untuk melaksanakannya Tetapi selepas kedatangan HTML5, kami boleh memuat naik fail dengan mudah menggunakan atribut HTML5 A FormData, digabungkan dengan Jquery, mudah untuk memuat naik fail dan membaca kemajuan muat naik fail Kes muat naik berikut adalah berdasarkan pelaksanaan di atas Di bawah saya akan meletakkan semua kod halaman JS, CSS dan HTML.
Nota: Atribut FormData mesti bergantung pada HTML5, jadi jika anda melaksanakan fungsi mengikut kod dalam artikel ini, penyemak imbas mesti dinaik taraf kepada yang terkini (menyokong atribut HTML5 FormData).
2. Kod halaman HTML adalah seperti berikut
<!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) { $.post('/Test/Remove', { "filename": d }, function(r) { }); } </script> </body> </html>
3.Kod CSS adalah seperti berikut:
/*源文件头信息: <copyright file="FileUpload.js"> Copyright(c)2014-2034 Kencery.All rights reserved. 个人博客:http://www.cnblogs.com/hanyinglong 创建人:韩迎龙(kencery) 创建时间:2015-6-24 </copyright>*/ body { font-family: "微软雅黑"; font-size: 12px; } .input-file { overflow: hidden; position: relative; } .input-file input { opacity: 0; filter: alpha(opacity=0); font-size: 100px; position: absolute; top: 0; right: 0; } #uploadTable { width: 500px; border-collapse: collapse; border: 1px solid Silver; }
4. Kod JS adalah seperti berikut:
// 源文件头信息: // <copyright file="FileUpload.js"> // Copyright(c)2014-2034 Kencery.All rights reserved. // 创建人:韩迎龙(kencery) // 创建时间:2015-6-24 // </copyright> ; (function($) { $.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. Alamat paparan kod: https://github.com/kencery/Common/tree/master/KenceryCommonMethod/Muat naik fail
Di atas adalah keseluruhan kandungan artikel ini, saya harap anda semua menyukainya.