function uploadify() {

        $("#uploadify").uploadify({

            method:'post',

            uploader: '/Manage/Order/SubmitUploadify',

            swf: '/Content/scripts/plugins/uploadify/uploadify.swf',

            buttonText: "上传文件",

            height: 30,

            width: 110,

            fileTypeExts: '*.jpg;*.doc;*.docx;*.pdf;*.png',

            fileSizeLimit: '10MB',

            multi: false,

            formData: "ContractCode":"20170222","UserId":"20125"

            },

            onUploadStart: function (file) {

                some code...

            },

            onUploadSuccess: function (file, data, response) {

                var obj = jQuery.parseJSON(data);

                if (obj.State) {

                    $("#ContractFile").val(obj.FilePath);

                }

            },

            onUploadError: function (file) {

                $("#" + file.id).prepend('<span class="error" title="失败"><i class="fa fa-exclamation-circle"></i></span>');

            }

        });

        $("#uploadify-button").prepend('<i style="opacity: 0.6;" class="fa fa-cloud-upload"></i>&nbsp;');

    }

[HttpPost]

public ActionResult SubmitUploadify(HttpPostedFileBase fileData,string contractCode,string userId)

{

   string formatFilePath = string.Format("~/Uploads/ContractFile/{0}", contractCode);

   ResultUpload rst = UploadHelper.Uploadify(fileData, formatFilePath);

   return Content(rst.ToJson());

}