/// <summary>
        /// 在拦截的方法开始执行时候调用
        /// </summary>
        /// <param name="invocation"></param>
        protected override void PerformProceed(IInvocation invocation)
        {
            if (invocation.Method.Name.Equals("OnActionExecuting"))
            {
                ActionExecutingContext filterContext = (ActionExecutingContext)invocation.GetArgumentValue(0);


                if (!_authAspect.IsAuthenticationByMvc(filterContext))
                {
                    HttpContext.Current.Response.Redirect("", true);//权限认证不通过,跳转到指定页面.
                    return;
                }
            }

            base.PerformProceed(invocation);
        }