Upload not supported under Jquery.fileupload plugin IE9

According to 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. To support uploading. AJAX style file uploads must be supported, either via XHR or via the Iframe Transport,

One of these three kinds, so I chose the last iframe Transport

, according to the address under the IFRAME transport link https://cmlenz.github.io/jquery-iframe-transport/

1, download jquery.iframe-transport.js. Then introduce the JS file

2, according to https://cmlenz.github.io/jquery-iframe-transport/

Add parameters for browsers with Ie10 the following parameters: Iframe=true

?

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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);                 });             }                     });