public static AdminLoginUser GetAdminLoginUser()
{
#region 获取当前登录者信息
AdminLoginUser result = null;
try
{
if (HttpContext.Current.Session["User"] != null)
{
result = HttpContext.Current.Session["User"] as AdminLoginUser;
}
else
{
result = null;
}
}
catch (Exception ex)
{
//TTracer.WriteLog(ex.ToString());
}
return result;
#endregion
}

public class SessionAndAuthority : ActionFilterAttribute//ActionFilterAttribute是Action过滤类,该属于会在执行一个action之前先执行.

    {

        //后台登录用户

        protected AdminLoginUser adminloginUser

        {

            get

            {

                return Test1.Common.UserHelper.GetAdminLoginUser();

            }

        }

        /// <summary>

        /// 使用验证时 [NoSign] 标注不需要登录和权限验证

        /// </summary>

        [AttributeUsage(AttributeTargets.Method | AttributeTargets.Class, Inherited = true)]

        public class NoSignAttribute : Attribute

        {

        }

        //操作是否需要判断

        private static bool SkipNoSign(ActionExecutingContext actionContext)

        {

            return actionContext.ActionDescriptor.GetCustomAttributes(typeof(NoSignAttribute), true).Length == ;//有NoSign属性  true

        }

        //在执行操作方法之前 判断登录情况和页面权限

        public override void OnActionExecuting(ActionExecutingContext filterContext)

        {

            if (SkipNoSign(filterContext))//是否该类标记为NoSign，如果是则不需要判断

            {

                base.OnActionExecuting(filterContext);

                return;

            }

            #region 先判断session

            if (null == adminloginUser)

            {

                //session 过期

                if (!filterContext.HttpContext.Request.IsAjaxRequest())

                {

                    // 请求跳转到Tip页面

                    filterContext.Result = new RedirectResult("/Home/Tip?state=0");

                }

                else

                {

                    //ajax请求 返回json格式提示

                    if (filterContext.HttpContext.Request.HttpMethod == "GET")

                    {

                        filterContext.Result = new RedirectResult("/Home/Tip?state=0");

                    }

                    else

                    {

                        ContentResult content = new ContentResult();

                        ResultMessage msg = new ResultMessage() { success = false, message = "登录已过期，请重新登录！" };

                        content.Content = msg.ToJson();

                        filterContext.Result = content;

                    }

                }

            }

            #endregion

        }

    }

HttpContext.Session["User"] = LoginUserInfo;