C#实现文件上传以及多文件上传功能
一、前端搭建
1、前端用到js:uploadify(下载地址:)、layer (下载地址:),下载之后把它们放在你的项目里 列如
2、根据你的需要在你项目适当的位置建立上传文件的目录 列如(file)
到此前端搭建结束
二、配置文件修改(可选择跳过此步骤)
1、首先说明下,这个步骤可以跳过,此步骤主要是修改上传文件大小的限制(.net 默认最大只能上传4m)如若需要修改请继续阅读该步骤。
2、打开web.config 配置文件 找到<system.web> 节点 ,在该节点下面添加如下节点
<httpruntime targetframework="4.5" executiontimeout="500" maxrequestlength="409600" usefullyqualifiedredirecturl="false" minfreethreads="8" minlocalrequestfreethreads="4" apprequestqueuelimit="100" /> <!-- maxrequestlength属性是上传文件大小的设置 值是kb大小 maxrequestlength=“1024” 为最大上传1m -->
三、代码编写
1、说明下:我用的是mvc模式 所以这里就用mvc的方式编写 (代码是不变的,开发者可以根据你们的设计模式编写)
2、建立一个控制器pagebasecontroller在该控制器里编写如下代码 (如果是用的aspx页面那么把fileupdateview方法删掉 ,把uploadifyfile 方法的actionresult改成void 并去掉return null;)
后端代码如下
/// <summary> /// 文件上传页面 /// </summary> /// <returns></returns> public actionresult fileupdateview() { return view(); } /// <summary> /// 文件处理方法 /// </summary> /// <param name="filedata"></param> /// <returns></returns> public actionresult uploadifyfile(httppostedfilebase filedata) { if (filedata == null || string.isnullorempty(filedata.filename) || filedata.contentlength == 0) { return httpnotfound(); } string filename = system.io.path.getfilename(filedata.filename); string virtualpath = string.format("~/file/{0}", filename); string path = server.mappath(virtualpath); // 以下注释的代码 都可以获得文件属性 // system.diagnostics.fileversioninfo info = system.diagnostics.fileversioninfo.getversioninfo(path); // fileinfo file = new fileinfo(filedata.filename); filedata.saveas(path); return null; }
注:virtualpath 是我们搭建上传文件的目录
3、在视图(页面)里引用我们搭建的js:uploadfiy 、layer 路径
列如:
<script src="~/scripts/jquery-1.10.2.js"></script> <script src="~/scripts/lib/layer/layer.js"></script> <link href="~/scripts/lib/uploadify/uploadify.css" rel="external nofollow" rel="stylesheet" /> <script src="~/scripts/jquery-1.10.2.min.js"></script> <script src="~/scripts/lib/uploadify/jquery.uploadify.min.js"></script>
注:这里我们用到了jquery
4、前端代码
<script type="text/javascript"> var uploadifyonselecterror; var uploadifyonuploaderror; var uploadifyonselect; var uploadifyonuploadsuccess; uploadifyonselecterror = function (file, errorcode, errormsg) { var msgtext = "上传失败\n"; switch (errorcode) { case swfupload.queue_error.queue_limit_exceeded: //this.queuedata.errormsg = "每次最多上传 " + this.settings.queuesizelimit + "个文件"; msgtext += "每次最多上传 " + this.settings.queuesizelimit + "个文件"; break; case swfupload.queue_error.file_exceeds_size_limit: msgtext += "文件大小超过限制( " + this.settings.filesizelimit + " )"; break; case swfupload.queue_error.zero_byte_file: msgtext += "文件大小为0"; break; case swfupload.queue_error.invalid_filetype: msgtext += "文件格式不正确,仅限 " + this.settings.filetypeexts; break; default: msgtext += "错误代码:" + errorcode + "\n" + errormsg; } layer.msg(msgtext); }; uploadifyonuploaderror = function (file, errorcode, errormsg, errorstring) { // 手工取消不弹出提示 if (errorcode == swfupload.upload_error.file_cancelled || errorcode == swfupload.upload_error.upload_stopped) { return; } var msgtext = "上传失败\n"; switch (errorcode) { case swfupload.upload_error.http_error: msgtext += "http 错误\n" + errormsg; break; case swfupload.upload_error.missing_upload_url: msgtext += "上传文件丢失,请重新上传"; break; case swfupload.upload_error.io_error: msgtext += "io错误"; break; case swfupload.upload_error.security_error: msgtext += "安全性错误\n" + errormsg; break; case swfupload.upload_error.upload_limit_exceeded: msgtext += "每次最多上传 " + this.settings.uploadlimit + "个"; break; case swfupload.upload_error.upload_failed: msgtext += errormsg; break; case swfupload.upload_error.specified_file_id_not_found: msgtext += "找不到指定文件,请重新操作"; break; case swfupload.upload_error.file_validation_failed: msgtext += "参数错误"; break; default: msgtext += "文件:" + file.name + "\n错误码:" + errorcode + "\n" + errormsg + "\n" + errorstring; } layer.msg(msgtext); }; uploadifyonselect = function () { }; uploadifyonuploadsuccess = function (file, data, response) { layer.msg(file.name + "\n\n" + response + "\n\n" + data); }; $(function () { $("#uploadify").uploadify({ uploader: '/pagebase/uploadifyfun', //处理上传的方法 swf: '/scripts/lib/uploadify/uploadify.swf', width: 80, // 按钮宽度 height: 60, //按钮高度 buttontext: "上传文件", buttoncursor: 'hand', filesizelimit:20480, fileobjname: 'filedata', filetypeexts: '*.xlsx;*.docx', //扩展名 filetypedesc: "请选择xslx,docx文件", //文件说明 auto: false, //是否自动上传 multi: true, //是否一次可以选中多个文件 queuesizelimit: 5, //允许同时上传文件的个数 overrideevents: ['onselecterror', 'ondialogclose'], // 是否要默认提示 要就不配置 onselect: uploadifyonselect, onselecterror: uploadifyonselecterror, onuploaderror: uploadifyonuploaderror, onuploadsuccess: uploadifyonuploadsuccess }); }); </script> <span id="uploadify"></span> <div> <a href="javascript:$('#uploadify').uploadify('upload','*');">上传</a> <a href="javascript:$('#uploadify').uploadify('cancel', '*');">取消</a> </div>
注:filesizelimit 属性的值最好和我们web.config 里设置的文件上传最大值一样(不能大于这个值)
到这里。我们文件上传就结束了。
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