使用ajaxfileupload插件进行Ajax Post 异步提交多个文件
前台代码:
<div> <div> <img src="images/pro_upload.png" onclick="javascript:document.getElementById('pic1').click();" /> <input type="file" hidden="hidden" id="pic1" name="pic1" /> </div> <div> <img src="images/pro_upload.png" onclick="javascript:document.getElementById('pic2').click();" /> <input type="file" hidden="hidden" id="pic2" name="pic2" /> </div> <span id="btn">提交</span> </div> <script type="text/javascript" src="js/jquery-2.1.3.min.js"></script> <script src="../JS/ajaxfileupload.js"></script> <script> document.getElementById("btn").onclick = function () { $.ajaxFileUpload({ url: "FileTestHanlder.ashx?param=testParam",//可以携带多个其他参数 secureuri: false, fileElementId: ["pic1","pic2"], //对应的文件表单域name属性 dataType: "TEXT", success: function (data, status) { alert(data); } }); } </script>
后台代码:
public class FileTestHanlder : IHttpHandler { public void ProcessRequest (HttpContext context) { context.Response.Write(context.Request.Files["pic1"].ContentLength + context.Request.Files["pic2"].ContentLength + context.Request["param"]); } public bool IsReusable { get { return false; } } }
ajaxfileupload.js插件代码(有改动):
jQuery.extend({ 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] ); } } , createUploadIframe: function(id, uri) { //create frame var frameId = 'jUploadFrame' + id; 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; } 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>'); if (typeof (fileElementId) == 'string') { fileElementId = [fileElementId]; } for (var i in fileElementId) { var oldElement = jQuery('#' + fileElementId[i]); var newElement = jQuery(oldElement).clone(); jQuery(oldElement).attr('id', fileId); jQuery(oldElement).before(newElement); jQuery(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; } })