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:http://www.uploadify.com/download/)、layer (下载地址:http://layer.layui.com/),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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