• C# MVC ajaxFileUpload 导入Excel文件以及遇到的问题


    0 ajaxFileUpload简介

    ajaxFileUpload插件是一个非常简单的基于Jquery的异步上传文件的插件,使用过程中发现很多与这个同名的,基于原始版本基础之上修改过的插件,文件版本比较多,我把我自己使用的ajaxFileUpload文件上传到博客园上了,想要使用的朋友可以下载:http://files.cnblogs.com/files/fonour/ajaxfileupload.js

    整个插件源码不到200行,实现非常简单,大致原理就是通过js动态创建隐藏的表单,然后进行提交操作,达到附件上传的目的,主要实现在源码里都有注释,不难理解,我们也可以基于此简单版本实现更复杂的操作。

    1 ajaxFileUpload使用说明

    ajaxFileUpload的使用也很简单,调用ajaxFileUpload方法即可,各配置项详细说明如下:

    复制代码
    $.ajaxFileUpload({
              type: "post",                          //请求类型:post或get,当要使用data提交自定义参数时一定要设置为post
              url: "/Shared/Upload",                 //文件上传的服务器端请求地址
                secureuri: false,                      //是否启用安全提交,一般默认为false就行,不用特殊处理
                fileElementId: "filePicture",          //文件上传控件的id   <input type="file" id="filePicture" name="filePicture" accept=".jpg,.jpeg,.png,.bmp" onchange="filePictureChange()" />
              dataType: "json",                      //返回值类型,一般设置为json,还支持htmlxmlscript类型
                data: { "id": "1", "name": "test" },   //用于post请求提交自定义参数
                success: function (data, status) {     //服务器成功响应处理函数
                },
                error: function (data, status, e) {    //服务器响应失败处理函数
                }
            });
    复制代码

    首先在页面添加对JQuery及ajaxFileUpload的引用,这里的JQuery用的2.1.4版本,经测试用各个版本基本没什么影响。

    <script src="../../Content/js/jquery-2.1.4.min.js"></script>
    <script src="../../Content/js/ajaxfileupload.js"></script>

    页面添加类型为file的input标签

    首先在页面添加对JQuery及ajaxFileUpload的引用,这里的JQuery用的2.1.4版本,经测试用各个版本基本没什么影响。

    <script src="../../Content/js/jquery-2.1.4.min.js"></script>
    <script src="../../Content/js/ajaxfileupload.js"></script>

    页面添加类型为file的input标签

    <input type="file" id="filePicture" name="filePicture" accept=".jpg,.jpeg,.png,.bmp" onchange="filePictureChange()" />

    通过accept可以限定打开文件选择对话框后,默认能选择的文件类型。文件类型的定义主要有以下这些

    复制代码
    *.3gpp  audio/3gpp, video/3gpp  3GPP Audio/Video
    
    *.ac3   audio/ac3   AC3 Audio
    
    *.asf   allpication/vnd.ms-asf  Advanced Streaming Format
    
    *.au    audio/basic AU Audio
    
    *.css   text/css    Cascading Style Sheets
    
    *.csv   text/csv    Comma Separated Values
    
    *.doc   application/msword  MS Word Document
    
    *.dot   application/msword  MS Word Template
    
    *.dtd   application/xml-dtd Document Type Definition
    
    *.dwg   image/vnd.dwg   AutoCAD Drawing Database
    
    *.dxf   image/vnd.dxf   AutoCAD Drawing Interchange Format
    
    *.gif   image/gif   Graphic Interchange Format
    
    *.htm   text/html   HyperText Markup Language
    
    *.html  text/html   HyperText Markup Language
    
    *.jp2   image/jp2   JPEG-2000
    
    *.jpe   image/jpeg  JPEG
    
    *.jpeg  image/jpeg  JPEG
    
    *.jpg   image/jpeg  JPEG
    
    *.js    text/javascript, application/javascript JavaScript
    
    *.json  application/json    JavaScript Object Notation
    
    *.mp2   audio/mpeg, video/mpeg  MPEG Audio/Video Stream, Layer II
    
    *.mp3   audio/mpeg  MPEG Audio Stream, Layer III
    
    *.mp4   audio/mp4, video/mp4    MPEG-4 Audio/Video
    
    *.mpeg  video/mpeg  MPEG Video Stream, Layer II
    
    *.mpg   video/mpeg  MPEG Video Stream, Layer II
    
    *.mpp   application/vnd.ms-project  MS Project Project
    
    *.ogg   application/ogg, audio/ogg  Ogg Vorbis
    
    *.pdf   application/pdf Portable Document Format
    
    *.png   image/png   Portable Network Graphics
    
    *.pot   application/vnd.ms-powerpoint   MS PowerPoint Template
    
    *.pps   application/vnd.ms-powerpoint   MS PowerPoint Slideshow
    
    *.ppt   application/vnd.ms-powerpoint   MS PowerPoint Presentation
    
    *.rtf   application/rtf, text/rtf   Rich Text Format
    
    *.svf   image/vnd.svf   Simple Vector Format
    
    *.tif   image/tiff  Tagged Image Format File
    
    *.tiff  image/tiff  Tagged Image Format File
    
    *.txt   text/plain  Plain Text
    
    *.wdb   application/vnd.ms-works    MS Works Database
    
    *.wps   application/vnd.ms-works    Works Text Document
    
    *.xhtml application/xhtml+xml   Extensible HyperText Markup Language
    
    *.xlc   application/vnd.ms-excel    MS Excel Chart
    
    *.xlm   application/vnd.ms-excel    MS Excel Macro
    
    *.xls   application/vnd.ms-excel    MS Excel Spreadsheet
    
    *.xlt   application/vnd.ms-excel    MS Excel Template
    
    *.xlw   application/vnd.ms-excel    MS Excel Workspace
    
    *.xml   text/xml, application/xml   Extensible Markup Language
    
    *.zip   aplication/zip  Compressed Archive
    复制代码

    我这里没有单独放上传按钮,添加了onchange事件,在选择文件后立即上传文件,onchange时间定义如下。

    复制代码
    function filePictureChange() {
                $.ajaxFileUpload({
                    url: "/Shared/Upload", //用于文件上传的服务器端请求地址
                       type: "post",
                    secureuri: false, //一般设置为false
                    fileElementId: "filePicture", //文件上传空间的id属性
                       dataType: "json", //返回值类型 一般设置为json
                    success: function (data, status) {  //服务器成功响应处理函数
                           alert(data.fileName);
                        alert(data.filePath);
                        alert(data.fileSize);
                    },
                    error: function (data, status, e){  //服务器响应失败处理函数
                           alert(e);
                    }
                });
            };
    复制代码

    后台控制器处理方法如下,使用MD5处理,判断文件是否已经存在,避免文件重复上传。

    复制代码
    /// <summary>
            /// 附件上传
            /// </summary>
            /// <returns></returns>
            public ActionResult Upload()
            {
                HttpFileCollection files = System.Web.HttpContext.Current.Request.Files;
                if (files.Count == 0) return Json("Faild", JsonRequestBehavior.AllowGet);
                MD5 md5Hasher = new MD5CryptoServiceProvider();
                /*计算指定Stream对象的哈希值*/
                byte[] arrbytHashValue = md5Hasher.ComputeHash(files[0].InputStream);
                /*由以连字符分隔的十六进制对构成的String,其中每一对表示value中对应的元素;例如“F-2C-4A”*/
                string strHashData = System.BitConverter.ToString(arrbytHashValue).Replace("-", "");
                string FileEextension = Path.GetExtension(files[0].FileName);
                string uploadDate = DateTime.Now.ToString("yyyyMMdd");
                string virtualPath = string.Format("/Data/ComponentAttachments/{0}/{1}{2}", uploadDate, strHashData, FileEextension);
                string fullFileName = Server.MapPath(virtualPath);
                //创建文件夹,保存文件
                  string path = Path.GetDirectoryName(fullFileName);
                Directory.CreateDirectory(path);
                if (!System.IO.File.Exists(fullFileName))
                {
                    files[0].SaveAs(fullFileName);
                }
                string fileName = files[0].FileName.Substring(files[0].FileName.LastIndexOf("\") + 1, files[0].FileName.Length - files[0].FileName.LastIndexOf("\") - 1);
                string fileSize = GetFileSize(files[0].ContentLength);
                return Json(new { FileName = fileName, FilePath = virtualPath, FileSize = fileSize }, "text/html", JsonRequestBehavior.AllowGet);
            }
            /// <summary>
            /// 获取文件大小
            /// </summary>
            /// <param name="bytes"></param>
            /// <returns></returns>
            private string GetFileSize(long bytes)
            {
                long kblength = 1024;
                long mbLength = 1024 * 1024;
                if (bytes < kblength)
                    return bytes.ToString() + "B";
                if (bytes < mbLength)
                    return decimal.Round(decimal.Divide(bytes, kblength), 2).ToString() + "KB";
                else
                    return decimal.Round(decimal.Divide(bytes, mbLength), 2).ToString() + "MB";
            }
    复制代码

    2 ajaxFileUpload使用过程中的一些问题

    IE浏览器弹下载框问题解决方法:
     
    前台:datatype:"text/html", success成功后 data = JSON.parse(data);进行转换
     
    后台:控制器返回 return Json(new { data = data, success = true }, "text/html", JsonRequestBehavior.AllowGet);
     
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  • 原文地址:https://www.cnblogs.com/Jhon-xu/p/7568209.html
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