写完asp.net多文件上传后,感觉这种上传还是有很多缺陷,于是。。。(省略一万字,不废话)。这里我没用传统的asp.net,而选择了开源的asp.net core,原因很简单,.net core是.net新的开始,更是.net和.net开发者的未来,希望.net发展越来越好(大家的工资越来越高(●ˇ∀ˇ●))。
1.前端的实现:
1).html:
<html><head> <meta name="viewport" content="width=device-width" /> <title>Index</title> <link href="/lib/bootstrap/dist/css/bootstrap.css" rel="external nofollow" rel="stylesheet" /> <script src="/lib/jquery/dist/jquery.js"></script> <script src="/lib/bootstrap/dist/js/bootstrap.js"></script> <script src="/js/UploadJs.js"></script></head><body> <div class="row" style="margin-top:20%"> <div class="col-lg-4"></div> <div class="col-lg-4"> <input type="text" value="请选择文件" size="20" name="upfile" id="upfile" style="border:1px dotted #ccc"> <input type="button" value="浏览" onclick="path.click()" style="border:1px solid #ccc;background:#fff"> <input type="file" id="path" style="display:none" multiple="multiple" onchange="upfile.value=this.value"> <br /> <span id="output">0%</span> <button type="button" id="file" onclick="UploadStart()" style="border:1px solid #ccc;background:#fff">开始上传</button> </div> <div class="col-lg-4"></div> </div></body></html>
2).javascript:
var UploadPath = "";//开始上传function UploadStart() { var file = $("#path")[0].files[0]; AjaxFile(file, 0);}function AjaxFile(file, i) { var name = file.name, //文件名 size = file.size, //总大小shardSize = 2 * 1024 * 1024, shardSize = 2 * 1024 * 1024,//以2MB为一个分片 shardCount = Math.ceil(size / shardSize); //总片数 if (i >= shardCount) { return; } //计算每一片的起始与结束位置 var start = i * shardSize, end = Math.min(size, start + shardSize); //构造一个表单,FormData是HTML5新增的 var form = new FormData(); form.append("data", file.slice(start, end)); //slice方法用于切出文件的一部分 form.append("lastModified", file.lastModified); form.append("fileName", name); form.append("total", shardCount); //总片数 form.append("index", i + 1); //当前是第几片 UploadPath = file.lastModified //Ajax提交文件 $.ajax({ url: "/Upload/UploadFile", type: "POST", data: form, async: true, //异步 processData: false, //很重要,告诉jquery不要对form进行处理 contentType: false, //很重要,指定为false才能形成正确的Content-Type success: function (result) { if (result != null) { i = result.number++; var num = Math.ceil(i * 100 / shardCount); $("#output").text(num + '%'); AjaxFile(file, i); if (result.mergeOk) { var filepath = $("#path"); filepath.after(filepath.clone().val("")); filepath.remove();//清空input file $('#upfile').val('请选择文件'); alert("success!!!"); } } } });}
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