[Authorize]
        public ContentResult Index2()
        {
            return Content("验证通过了");
        } 

 public WebApiApplication()
        {
            PostAuthenticateRequest += WebApiApplication_PostAuthenticateRequest;
        }

        /// <summary>
        /// 获取到了用户的身份信息
        /// </summary>
        /// <param name="sender"></param>
        /// <param name="e"></param>
        private void WebApiApplication_PostAuthenticateRequest(object sender, EventArgs e)
        {
            //身份验证逻辑

            //关键代码
            HttpContext.Current.User = new MyUser() { code = "admin", name = "admin" };
        }