ASP.NET MVC 过滤器中的ActionExecutingContext参数

Question

  public class AuthenticationFilter : FilterAttribute 
    {
        //
        // GET: /AuthenticationFilter/        public override void OnActionExecuting(ActionExecutingContext filterContext)
        {
            //如果当前用户没有登录，则取消以后的操作，重新指定一个ActionResult
            if (!filterContext .HttpContext .User .Identity.IsAuthenticated  )
            {
               filterContext.
                filterContext.Result = new RedirectToRouteResult("Default", new  RouteValueDictionary (new { action = "Login" }));
            }
        }    }
按理说filterContext应该有Cancel属性，为什么调不出来呢，我的是ASP.NET MVC 2

Answer 1

我想你遇到的和我一样。用户ID。或SessionID为空的时候，跳转到登陆页或指定的页是一个一回事。
这个下面包含的内容多了。
1、直接重载当前的控制器就可以。整个站点需要，当然可以创建一个Base控制器。protected override void OnActionExecuting(ActionExecutingContext filterContext)
        {
            var timestamp = filterContext.HttpContext.Timestamp;
            var timeout = filterContext.HttpContext.Session.Timeout;            var userSessionID = Session["UserSessionID"];
            var user = Session["User"];
            if (userSessionID == null || user == null)
            {
                Logon(filterContext);
            } 
        }        private void Logon(ActionExecutingContext filterContext )
        {
            RouteValueDictionary dictionary = new RouteValueDictionary
            (new
            {
                controller = "Account",
                action = "Logon",
                returnUrl = filterContext.HttpContext.Request.RawUrl
            });
            filterContext.Result = new RedirectToRouteResult(dictionary);
           }
       }

Answer 2

  public class CheckSessionFilterAttribute : ActionFilterAttribute
    {
        public override void OnActionExecuting(ActionExecutingContext filterContext)
        {
            HttpContext httpcontext = HttpContext.Current; //获取当前的 HttpSessionState   
            var userSessionID = httpcontext.Session["UserSessionID"];
            if (userSessionID == null)
            {
                Logon(filterContext);
            }
            if( httpcontext.Session != null )            
            {             
                //确认Session是否已建立            
                if( httpcontext.Session.IsNewSession )       
                {                                      
                    //確認是否已存在cookies                 
                    String sessioncookie = httpcontext.Request.Headers[ "Cookie" ];             
                    if( (sessioncookie != null ) && ( sessioncookie.IndexOf( "ASP.NET_SessionId" ) >= 0 ))
                    {      
                        Logon( filterContext );               
                    }            
                }            
            }          
            base.OnActionExecuting( filterContext );      
        }        /// <summary>
        /// 路由到登录页面
        /// </summary>
        /// <param name="filterContext"></param>
        private void Logon(ActionExecutingContext filterContext )
        {
            RouteValueDictionary dictionary = new RouteValueDictionary
            (new
            {
                controller = "Account",
                action = "Logon",
                returnUrl = filterContext.HttpContext.Request.RawUrl
            });
            filterContext.Result = new RedirectToRouteResult(dictionary);
           }
       }