上传文件是常要处理的事情,使用ajaxFileUpload.js处理比较方便,这里的ajaxFileUpload.js文件修改过的,
Html部分
<input type="file" id="fu_UploadFile" name="fu_UploadFile" value="" title="上传附件"> <input type="button" value="上传" onclick="upload()" />
JS部分:
function upload() { var path = document.getElementById("fu_UploadFile").value; if ($.trim(path) == "") { alert("请选择要上传的文件"); return; } console.log("test"); var result_msg = ""; $.ajaxFileUpload({ url: '/UpFile.ashx', //这里是服务器处理的代码 type: 'post', secureuri: false, //一般设置为false fileElementId: 'fu_UploadFile', // 上传文件的id、name属性名 dataType: 'json', //返回值类型,一般设置为json、application/json data: {}, //传递参数到服务器 success: function (data, status) { if (data.Result) { alert("文件成功处理完成!" + data.FileName); } else { alert("文件成功处理出错!原因:" + data.ErrorMessage); } }, error: function (data, status, e) { alert("错误:上传组件错误,请检察网络!"); } }); }
服务器:
/// <summary> /// UpFile 的摘要说明 /// </summary> public class UpFile : IHttpHandler { public void ProcessRequest(HttpContext context) { context.Response.ContentType = "text/plain"; UpFileResult result = new UpFileResult(); try { HttpPostedFile _upfile = context.Request.Files["fu_UploadFile"]; if (_upfile == null) { throw new Exception("请先选择文件!"); } else { string fileName = _upfile.FileName;/*获取文件名: C:Documents and SettingsAdministrator桌面123.jpg*/ string suffix = fileName.Substring(fileName.LastIndexOf(".") + 1).ToLower();/*获取后缀名并转为小写: jpg*/ int bytes = _upfile.ContentLength;//获取文件的字节大小 // if (!(suffix == "jpg" || suffix == "gif" || suffix == "png"|| suffix == "jpeg")) throw new Exception("只能上传JPE,GIF,PNG文件"); if (bytes > 1024 * 1024*10) throw new Exception("文件最大只能传10M"); string newfileName = DateTime.Now.ToString("yyyyMMddHHmmss"); string fileDir = HttpContext.Current.Server.MapPath("~/upfiles/"); if (!Directory.Exists(fileDir)) { Directory.CreateDirectory(fileDir); } result.FileName = fileName;
string saveDir = fileDir + newfileName + "." + suffix;
result.FileURL = "~/upfiles/" + newfileName + "." + suffix;
_upfile.SaveAs(result.FileURL);//保存图片 } } catch (System.Exception ex) { result.Result = false; result.ErrorMessage = ex.Message; } context.Response.Write(JsonHelper.SerializeObject(result)); } public bool IsReusable { get { return false; } } public class UpFileResult //: AshxCommonResult { public bool Result { get; set; } public string ErrorMessage { get; set; } public string FileName { get; set; } public string FileURL { get; set; } }
ajaxfileupload.js
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; var iframeHtml = '<iframe id="' + frameId + '" name="' + frameId + '" style="position:absolute; top:-9999px; left:-9999px"'; if(window.ActiveXObject) { if(typeof uri== 'boolean'){ iframeHtml += ' src="' + 'javascript:false' + '"'; } else if(typeof uri== 'string'){ iframeHtml += ' src="' + uri + '"'; } } iframeHtml += ' />'; jQuery(iframeHtml).appendTo(document.body); return jQuery('#' + frameId).get(0); }, createUploadForm: function(id, fileElementId, data) { //create form var formId = 'jUploadForm' + id; var fileId = 'jUploadFile' + id; var form = jQuery('<form action="" method="POST" name="' + formId + '" id="' + formId + '" enctype="multipart/form-data"></form>'); if(data) { for(var i in data) { jQuery('<input type="hidden" name="' + i + '" value="' + data[i] + '" />').appendTo(form); } } var oldElement = jQuery('#' + fileElementId); var newElement = jQuery(oldElement).clone(); jQuery(oldElement).attr('id', fileId); jQuery(oldElement).before(newElement); jQuery(oldElement).appendTo(form); //set attributes jQuery(form).css('position', 'absolute'); jQuery(form).css('top', '-1200px'); jQuery(form).css('left', '-1200px'); jQuery(form).appendTo('body'); 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, (typeof(s.data)=='undefined'?false: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 { jQuery(io).remove(); jQuery(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 form = jQuery('#' + formId); jQuery(form).attr('action', s.url); jQuery(form).attr('method', 'POST'); jQuery(form).attr('target', frameId); if(form.encoding) { jQuery(form).attr('encoding', 'multipart/form-data'); } else { jQuery(form).attr('enctype', 'multipart/form-data'); } jQuery(form).submit(); } catch(e) { jQuery.handleError(s, xml, null, e); } jQuery('#' + frameId).load(uploadCallback ); 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" ) var reg = /<pre.+?>(.+)</pre>/g; var result = data.match(reg); data = RegExp.$1; eval( "data = " + data ); // evaluate scripts within html if ( type == "html" ) jQuery("<div>").html(data).evalScripts(); return data; } })