C# 文件上传(可以多文件上传)

时间:2022-04-27 17:24:38

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

    C# 文件上传(可以多文件上传)

  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)

C# 文件上传(可以多文件上传)

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 == )
{
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="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 () { $("#uploadify").uploadify({
uploader: '/PageBase/UploadifyFun', //处理上传的方法
swf: '/Scripts/lib/uploadify/uploadify.swf',
width: , // 按钮宽度
height: , //按钮高度
buttonText: "上传文件",
buttonCursor: 'hand',
fileSizeLimit:,
fileobjName: 'Filedata',
fileTypeExts: '*.xlsx;*.docx', //扩展名
fileTypeDesc: "请选择xslx,docx文件", //文件说明
auto: false, //是否自动上传
multi: true, //是否一次可以选中多个文件
queueSizeLimit: , //允许同时上传文件的个数
overrideEvents: ['onSelectError', 'onDialogClose'], // 是否要默认提示 要就不配置
onSelect: uploadifyOnSelect,
onSelectError: uploadifyOnSelectError,
onUploadError: uploadifyOnUploadError,
onUploadSuccess: uploadifyOnUploadSuccess
});
});
</script>
<span id="uploadify"></span>
<div>
<a href="javascript:$('#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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