MVC 过滤器验证基础

         public void OnActionExecuting(ActionExecutingContext filterContext)
        {
                //获取Session的值
            var username = filterContext.HttpContext.Session["UserName"];
            var pwd = filterContext.HttpContext.Session["pwd"];
            //页面跳转(方法一)
            Controller controller = filterContext.Controller as Controller;
            if (username == null || pwd == null)
            {
             controller.HttpContext.Response.Redirect("/join/index");
            }
            //页面跳转（方法二）
            filterContext.Result = new RedirectResult("/Home/Index");
            
            //获取控制器名字
            string contextname =  filterContext.ActionDescriptor.ControllerDescriptor.ControllerName;
            
            //return可以跳过验证
           
        }