Server cannot modify cookies after HTTP headers have been sent
mvc 在ActionResult 加载时候回去读取客户端cookie,如果不存在在添加个cookie 但是却出现:Server cannot modify cookies after HTTP headers have been sent. System.Web.HttpCookie cookie = new System.Web.HttpCookie(cookieName); cookie.Value = s; cookie.Expires = DateTime.Now.AddHours(2