https://blog.csdn.net/sinat_16998945/article/details/81125950
界面如下图：
<html >
<head >
<!-- 引入jquery ajaxfileupload.js -->
<!-- ajaxfileupload.js 为了兼容IE不同版本，需要修改源代码，文章附带源代码 -->
<script src="../../Content/js/jquery/jquery-1.4.2.min.js" type="text/javascript"></script>
<script src="../../Content/js/ajaxfileupload.js" type="text/javascript"></script>
</head>
<body>
<div>
<div>
<input type="file" id="fileExcel" name="fileExcel" />
<a onclick="ajaxFileUpload()" href="javascript:void(0);" >上传</a>
</div>
</div>
</body>
<script type="text/javascript">
function ajaxFileUpload() {
try {
$.ajaxFileUpload({
url: '../../AjaxHandler/SIMManage/SIMInfoHandler.ashx?action=UpFile', //用于文件上传的服务器端请求地址
secureuri: false, //是否需要安全协议，一般设置为false
fileElementId: 'fileExcel', //文件上传域的ID
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
{
//上传成功
},
error: function (data, status, e)//服务器响应失败处理函数
{
alert(e);
}
})
} catch (e) {
alert(e.Message)
}
return false;
}
</script>
</html>ajaxfileupload源代码修改如下：
// 源代码
// if(window.ActiveXObject) {
// var io = document.createElement('<iframe id="' + frameId + '" name="' + frameId + '" />');
// if(typeof uri== 'boolean'){
// io.src = 'javascript:false';
// }
// else if(typeof uri== 'string'){
// io.src = uri;
// }
// }else {
// var io = document.createElement('iframe');
// io.id = frameId;
// io.name = frameId;
// }
//修改源代码，参考网上大神修改内容
if (window.ActiveXObject) {
if (jQuery.browser.version == "9.0" || jQuery.browser.version == "10.0") {
var io = document.createElement('iframe');
io.id = frameId;
io.name = frameId;
} else if (jQuery.browser.version == "6.0" || jQuery.browser.version == "7.0" || jQuery.browser.version == "8.0") {
var io = document.createElement('<iframe id="' + frameId + '" name="' + frameId + '" />');
if (typeof uri == 'boolean') {
io.src = 'javascript:false';
}
else if (typeof uri == 'string') {
io.src = uri;
}
}
}
else {
var io = document.createElement('iframe');
io.id = frameId;
io.name = frameId;
}
jQuery.extend({
createUploadIframe: function (id, uri) {
//create frame
var frameId = 'jUploadFrame' + id;
//*********************************************源代码，参考网上大神修改内容
// if(window.ActiveXObject) {
// var io = document.createElement('<iframe id="' + frameId + '" name="' + frameId + '" />');
// if(typeof uri== 'boolean'){
// io.src = 'javascript:false';
// }
// else if(typeof uri== 'string'){
// io.src = uri;
// }
// }else {
// var io = document.createElement('iframe');
// io.id = frameId;
// io.name = frameId;
// }
//***********************************************修改源代码
if (window.ActiveXObject) {
if (jQuery.browser.version == "9.0" || jQuery.browser.version == "10.0") {
var io = document.createElement('iframe');
io.id = frameId;
io.name = frameId;
} else if (jQuery.browser.version == "6.0" || jQuery.browser.version == "7.0" || jQuery.browser.version == "8.0") {
var io = document.createElement('<iframe id="' + frameId + '" name="' + frameId + '" />');
if (typeof uri == 'boolean') {
io.src = 'javascript:false';
}
else if (typeof uri == 'string') {
io.src = uri;
}
}
}
else {
var io = document.createElement('iframe');
io.id = frameId;
io.name = frameId;
}
io.style.position = 'absolute';
io.style.top = '-1000px';
io.style.left = '-1000px';
document.body.appendChild(io);
return io
},
createUploadForm: function (id, fileElementId) {
//create form
var formId = 'jUploadForm' + id;
var fileId = 'jUploadFile' + id;
var form = $('<form action="" method="POST" name="' + formId + '" id="' + formId + '" enctype="multipart/form-data"></form>');
var oldElement = $('#' + fileElementId);
var newElement = $(oldElement).clone();
$(oldElement).attr('id', fileId);
$(oldElement).before(newElement);
$(oldElement).appendTo(form);
//set attributes
$(form).css('position', 'absolute');
$(form).css('top', '-1200px');
$(form).css('left', '-1200px');
$(form).appendTo('body');
return form;
},
addOtherRequestsToForm: function (form, data) {
// add extra parameter
var originalElement = $('<input type="hidden" name="" value="">');
for (var key in data) {
name = key;
value = data[key];
var cloneElement = originalElement.clone();
cloneElement.attr({ 'name': name, 'value': value });
$(cloneElement).appendTo(form);
}
return form;
},
ajaxFileUpload: function (s) {
// TODO introduce global settings, allowing the client to modify them for all requests, not only timeout
s = jQuery.extend({}, jQuery.ajaxSettings, s);
var id = new Date().getTime()
var form = jQuery.createUploadForm(id, s.fileElementId);
if (s.data) form = jQuery.addOtherRequestsToForm(form, s.data);
var io = jQuery.createUploadIframe(id, s.secureuri);
var frameId = 'jUploadFrame' + id;
var formId = 'jUploadForm' + id;
// Watch for a new set of requests
if (s.global && !jQuery.active++) {
jQuery.event.trigger("ajaxStart");
}
var requestDone = false;
// Create the request object
var xml = {}
if (s.global)
jQuery.event.trigger("ajaxSend", [xml, s]);
// Wait for a response to come back
var uploadCallback = function (isTimeout) {
var io = document.getElementById(frameId);
try {
if (io.contentWindow) {
xml.responseText = io.contentWindow.document.body ? io.contentWindow.document.body.innerHTML : null;
xml.responseXML = io.contentWindow.document.XMLDocument ? io.contentWindow.document.XMLDocument : io.contentWindow.document;
} else if (io.contentDocument) {
xml.responseText = io.contentDocument.document.body ? io.contentDocument.document.body.innerHTML : null;
xml.responseXML = io.contentDocument.document.XMLDocument ? io.contentDocument.document.XMLDocument : io.contentDocument.document;
}
} catch (e) {
jQuery.handleError(s, xml, null, e);
}
if (xml || isTimeout == "timeout") {
requestDone = true;
var status;
try {
status = isTimeout != "timeout" ? "success" : "error";
// Make sure that the request was successful or notmodified
if (status != "error") {
// process the data (runs the xml through httpData regardless of callback)
var data = jQuery.uploadHttpData(xml, s.dataType);
// If a local callback was specified, fire it and pass it the data
if (s.success)
s.success(data, status);
// Fire the global callback
if (s.global)
jQuery.event.trigger("ajaxSuccess", [xml, s]);
} else
jQuery.handleError(s, xml, status);
} catch (e) {
status = "error";
jQuery.handleError(s, xml, status, e);
}
// The request was completed
if (s.global)
jQuery.event.trigger("ajaxComplete", [xml, s]);
// Handle the global AJAX counter
if (s.global && ! --jQuery.active)
jQuery.event.trigger("ajaxStop");
// Process result
if (s.complete)
s.complete(xml, status);
jQuery(io).unbind()
setTimeout(function () {
try {
$(io).remove();
$(form).remove();
} catch (e) {
jQuery.handleError(s, xml, null, e);
}
}, 100)
xml = null
}
}
// Timeout checker
if (s.timeout > 0) {
setTimeout(function () {
// Check to see if the request is still happening
if (!requestDone) uploadCallback("timeout");
}, s.timeout);
}
try {
// var io = $('#' + frameId);
var form = $('#' + formId);
$(form).attr('action', s.url);
$(form).attr('method', 'POST');
$(form).attr('target', frameId);
if (form.encoding) {
form.encoding = 'multipart/form-data';
}
else {
form.enctype = 'multipart/form-data';
}
$(form).submit();
} catch (e) {
jQuery.handleError(s, xml, null, e);
}
if (window.attachEvent) {
document.getElementById(frameId).attachEvent('onload', uploadCallback);
}
else {
document.getElementById(frameId).addEventListener('load', uploadCallback, false);
}
return { abort: function () { } };
},
uploadHttpData: function (r, type) {
var data = !type;
data = type == "xml" || data ? r.responseXML : r.responseText;
// If the type is "script", eval it in global context
if (type == "script")
jQuery.globalEval(data);
// Get the JavaScript object, if JSON is used.
if (type == "json") {
// If you add mimetype in your response,
// you have to delete the '<pre></pre>' tag.
// The pre tag in Chrome has attribute, so have to use regex to remove
var data = r.responseText;
var rx = new RegExp("<pre.*?>(.*?)</pre>", "i");
var am = rx.exec(data);
//this is the desired data extracted
var data = (am) ? am[1] : ""; //the only submatch or empty
eval("data = " + data);
}
// evaluate scripts within html
if (type == "html")
jQuery("<div>").html(data).evalScripts();
//alert($('param', data).each(function(){alert($(this).attr('value'));}));
return data;
}
})
一般处理程序（Handler）接收文件代码如下
using System;
using System.Collections.Generic;
using System.Linq;
using System.Web;
using System.Web.SessionState;
using System.IO;
namespace Web.AjaxHandler.SIMManage
{
/// <summary>
/// SIMInfoHandler 的摘要说明
/// </summary>
public class SIMInfoHandler : IHttpHandler
{
HttpRequest Request;
HttpResponse Response;
public void ProcessRequest(HttpContext context)
{
context.Response.ContentType = "text/plain";
Request = context.Request;
Response = context.Response;
string action = Request.QueryString["action"];
switch (action)
{
case "UpFile":
UpFile();
break;
}
}
private void UpFile()
{
HttpFileCollection files = Request.Files;
string msg = string.Empty;
string error = string.Empty;
string res = string.Empty;
try
{
string filename = System.IO.Path.GetFileName(files[0].FileName);
//判断是否有文件
if (filename == "")
{
Response.Write("上传文件为空，请选择上传文件格式为'.xls'的文件。");
return;
}
string [] strArrary = filename.Split('.');
//判断文件格式
if (strArrary.LastOrDefault() != "xls" && strArrary.LastOrDefault() != "xlsx")
{
Response.Write("上传文件格式不正确，请选择上传文件格式为'.xls'或'.xlsx'的文件。");
return;
}
//存放文件
if (Directory.Exists(HttpContext.Current.Server.MapPath("~/Document/TemporaryDocuments")) == false)//如果不存在就创建file文件夹
{
Directory.CreateDirectory(HttpContext.Current.Server.MapPath("~/Document/TemporaryDocuments"));
}
string url = "~/Document/TemporaryDocuments/" + filename;
string path = HttpContext.Current.Server.MapPath(url);
files[0].SaveAs(path);
Response.Write("上传文件成功");
return;
}
catch (Exception ex)
{
}
}
public bool IsReusable
{
get
{
return false;
}
}
}
}
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