保存TXT文件

   //TXT文件生成页面
        public ActionResult FileDownLoad(string filepth)
        {
            string FileCompath= Server.MapPath(filepth);
            string Result = "";
            StreamReader strmer = new StreamReader(FileCompath, Encoding.Default);             
            string  linetext;
            while ((linetext = strmer.ReadLine()) != null)
            {
                Result += linetext+"\r\n";
            }           
            Response.Headers["Content-Disposition"] = "attachment;filename=aaa.txt";
            Response.Write(Result);
            return View();
        }