一、自定义一个Action过滤器

public class CheckSession: ActionFilterAttribute    {        public override void OnActionExecuting(ActionExecutingContext filterContext)        {            object[] attrs = filterContext.ActionDescriptor.GetCustomAttributes(typeof(NoFilter), true);            if (attrs.Length == 1){}            else {                 if (filterContext.HttpContext.Session != null)                {                    if (filterContext.HttpContext.Session.IsNewSession)                    {                        var loginUser = filterContext.HttpContext.Session["User"];                        if (loginUser == null)                        {                            if (!filterContext.HttpContext.Request.IsAjaxRequest())                            {                                filterContext.Result = new RedirectResult("/GY_User/LoginIndex");                            }                            else                            {                                filterContext.Result = new JsonResult                                {                                    Data = new                                    {                                        Success = false,                                        Message = string.Empty,                                        Redirect = "/GY_User/LoginIndex"                                    }                                };                            }                        }                    }                }            }            // base.OnActionExecuting(filterContext);        }    }   //不想使用全局过滤器可使用此标签    public class NoFilter:Attribute    {        public NoFilter() { }    }

二、注册全局过滤器

在FilterConfig中添加

public static void RegisterGlobalFilters(GlobalFilterCollection filters)        {           // filters.Add(new HandleErrorAttribute());            filters.Add(new CheckSession());        }

在Global.asax中添加

protected void Application_Start()        {            AreaRegistration.RegisterAllAreas();            RouteConfig.RegisterRoutes(RouteTable.Routes);            FilterConfig.RegisterGlobalFilters(GlobalFilters.Filters);        }

三、在不想使用全局过滤器的Action上添加[NoFilter]标签

四、设置Session过期时间

Session["User"] = jsonData.data; Session.Timeout = 3;