public ActionResult Verification() { Verification val = new Verification(); //获得四位的验证码 string valcode = val.CreateValidateCode(4); //把验证码放入Session Session["validatecode"] = valcode; HttpCookie cookie = new HttpCookie("validatecode"); //把验证码放入客户端的cookie cookie.Value = valcode; Response.Cookies.Add(cookie); //得到图片字节数组 byte[] images = val.CreateValidateGraphic(valcode); return(File(images, "image/jpeg")); }