1. Verwenden Sie Jquery, um das FormData-Attribut von HTML5 zum Hochladen von Dateien zu verwenden
Wenn wir vor HTML5 Funktionen wie Datei-Upload-Server implementieren mussten, mussten wir uns manchmal auf FLASH verlassen, um diese zu implementieren. Nach der Einführung von HTML5 können wir Dateien jedoch problemlos mithilfe eines FormData-Attributs in HTML5 hochladen Mit Jquery ist es einfach, Dateien hochzuladen und den Upload-Fortschritt der Dateien zu lesen. Im Folgenden werde ich alle JS-, CSS- und HTML-Seitencodes einfügen.
Hinweis: Das FormData-Attribut muss von HTML5 abhängen. Wenn Sie also die Funktionen gemäß dem Code in diesem Artikel implementieren, muss der Browser auf die neueste Version aktualisiert werden (unterstützt das HTML5-FormData-Attribut).
2. Der HTML-Seitencode lautet wie folgt
<!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) { $.post('/Test/Remove', { "filename": d }, function(r) { }); } </script> </body> </html>
3.CSS-Code lautet wie folgt:
/*源文件头信息: <copyright file="FileUpload.js"> Copyright(c)2014-2034 Kencery.All rights reserved. 个人博客:http://www.cnblogs.com/hanyinglong 创建人:韩迎龙(kencery) 创建时间:2015-6-24 </copyright>*/ body { font-family: "微软雅黑"; font-size: 12px; } .input-file { overflow: hidden; position: relative; } .input-file input { opacity: 0; filter: alpha(opacity=0); font-size: 100px; position: absolute; top: 0; right: 0; } #uploadTable { width: 500px; border-collapse: collapse; border: 1px solid Silver; }
4. Der JS-Code lautet wie folgt:
// 源文件头信息: // <copyright file="FileUpload.js"> // Copyright(c)2014-2034 Kencery.All rights reserved. // 创建人:韩迎龙(kencery) // 创建时间:2015-6-24 // </copyright> ; (function($) { $.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. Code-Anzeigeadresse: https://github.com/kencery/Common/tree/master/KenceryCommonMethod/File upload
Das Obige ist der gesamte Inhalt dieses Artikels. Ich hoffe, er gefällt Ihnen allen.