jquery jaxFileUpload文件上传插件使用详解

作者:袖梨 2022-06-25

jaxFileUpload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:/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。

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:


$.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
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
}
});

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。


页面添加类型为file的input标签

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


*.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


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。

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);
}
});
};

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。


///


/// 附件上传
///

///
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);
}
///
/// 获取文件大小
///

///
///
private string GetFileSize(long bytes)
{
long kblength = 1024;
long mbLength = 1024 * 1024;
if (bytes return bytes.ToString() + "B";
if (bytes return decimal.Round(decimal.Divide(bytes, kblength), 2).ToString() + "KB";
else
return decimal.Round(decimal.Divide(bytes, mbLength), 2).ToString() + "MB";
}


2 ajaxFileUpload使用过程中的一些问题

2.0 jQuery.handleError is not a function

解决方法:

经测试handlerError只在jquery-1.4.2之前的版本中存在,以后版本中都没有这个函数了,因此在将handleError这个函数复制到ajaxFileUpload.js中,就行了

uploadHttpData: function (r, type) {
var data = !type;
data = type == "xml" || data ? r.responseXML : r.responseText;
// If the type is "script", eval it in global context
if (type == "script")
jQuery.globalEval(data);
// Get the JavaScript object, if JSON is used.
if (type == "json")
eval("data = " + data);
//eval("data = "" + data + """);
// evaluate scripts within html
if (type == "html")
jQuery("

").html(data).evalScripts();

return data;
},
handleError: function (s, xhr, status, e) {
// If a local callback was specified, fire it
if (s.error) {
s.error.call(s.context || s, xhr, status, e);
}

// Fire the global callback
if (s.global) {
(s.context ? jQuery(s.context) : jQuery.event).trigger("ajaxError", [xhr, s, e]);
}
}

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