jquery.fileupload插件 ie9下不支持上传

根据https://github.com/blueimp/jQuery-File-Upload/wiki/Browser-support

The following browsers support at least one form of AJAX style file uploads, either via XHR or via the Iframe Transport:

Desktop browsers

• Google Chrome
• Apple Safari 4.0+
• Mozilla Firefox 3.0+
• Opera 11.0+
• Microsoft Internet Explorer 6.0+

1、要支持上传.必须支持AJAX style file uploads, either via XHR or via the Iframe Transport,

这三种中的一种，所以我选择了最后一种Iframe Transport

，根据Iframe Transport链接下的地址https://cmlenz.github.io/jquery-iframe-transport/

1、下载jquery.iframe-transport.js。然后引入该js文件

2、根据 https://cmlenz.github.io/jquery-iframe-transport/

加入参数对于ie10以下的浏览器加入参数:iframe=true

var url = ctx	+ fileServiceURL.saveFiles;//上传文件的地址
		 
		 var iframe = false; 
			if($.browser.msie  && $.browser.version < 10){  
				iframe = true; 
			}
	 
		$('#' + _this.ctlID ).fileupload({
			url: url,
			//forceIframeTransport: forceIframeTransport,
			 iframe: iframe,
			dataType: 'json',
			//datatype: dataType,
			autoUpload: true,
			//sequentialUploads : true,
			formData: {signUploadFile: _this.signature},
			maxFileSize: 5000000, // 5 MB
			previewMaxWidth: 100,
			previewMaxHeight: 100,
			previewCrop: true
		}).on('fileuploadadd', function (e, data) {
			 
			pageLock("show");
		}).on("fileuploadsubmit", function(e, data){
			if(_this.signature && !_this.validSignatureUSB()){
				pageLock("hide");
				return false;
			}
			return true;
		}).on('fileuploaddone', function (e, data) {
			pageLock("hide"); 
			if((typeof data.result) == "undefined"){
				oAlert("不支持上传该格式的文件");
			}else{
				$.each(data.result.data, function(index){
					//console.log("new file " + this.fileID);
					_this.addFile(this.filename, this.fileID,  this.contentType, this.digestValue,  this.digestAlgorithm,  this.certificate, true);
				});
			}
			 
		}).on('fileuploadfail', function (e, data) {
			pageLock("hide");
			if((typeof data.result) == "undefined"){
				oAlert("可能您上传的文件格式不被支持!!!"); 
			}else{
				$.each(data.result.files, function (index, file) {
					var error = $('<span/>').text(file.error);
					$(data.context.children()[index])
						.append('<br>')
						.append(error);
				});
			}
			
		});