下载文件

        [HttpGet]
        public void DownUpdateOrderStateTmp()
        {
            string filePath = AppDomain.CurrentDomain.SetupInformation.ApplicationBase + "/Data/UpdateOrderStateTmp.xlsx";
            Response.ContentType = "application/ms-excel";
            Response.AddHeader("Content-Disposition", $"attachment;filename={System.Web.HttpUtility.UrlEncode("订票业务状态填写模板")}.xlsx");//防止IE下载文件名乱码
            Response.ContentEncoding = Encoding.UTF8;
            Response.TransmitFile(filePath);
        }