Example of asp code to implement jump function after timeout pop-up window

This article mainly introduces the function of jumping after timeout pop-up window in MVC in Asp.net. It is very good and has reference value. Friends who need it can refer to it

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Assume the expiration time is 30 minutes, and the verification occurs on the server. With the help offilter, you can write like this

 public class PowerFilter : AuthorizeAttribute
  {
    public override void OnAuthorization(AuthorizationContext filterContext)
    {
      var cookie = HttpContext.Current.Request.Cookies["loginInfo"];
      if(null == cookie)
      {
        filterContext.Result = new RedirectResult("/admin/login/index");
      }
      else
      {
        cookie.Expires = DateTime.Now.AddMinutes(30);
        HttpContext.Current.Response.Cookies.Remove("loginInfo");
        HttpContext.Current.Response.Cookies.Add(cookie);
      }
    }
  }

but the page will jump directly After transferring, there is no prompt, which seems not very friendly. It can be like this

public class PowerFilter : AuthorizeAttribute
  {
    public override void OnAuthorization(AuthorizationContext filterContext)
    {
      var cookie = HttpContext.Current.Request.Cookies["loginInfo"];
      if(null == cookie)
      {
        filterContext.Result = new ContentResult()
        {
          Content = string
          .Format("<script>alert(&#39;登录超时,请重新登录&#39;);location.href=&#39;{0}&#39;</script>","/admin/login/index")
        };
      }
      else
      {
        cookie.Expires = DateTime.Now.AddMinutes(30);
        HttpContext.Current.Response.Cookies.Remove("loginInfo");
        HttpContext.Current.Response.Cookies.Add(cookie);
      }
    }
  }
}

But what if it is an ajax request?

public class PowerFilter : AuthorizeAttribute
  {
    public override void OnAuthorization(AuthorizationContext filterContext)
    {
      var cookie = HttpContext.Current.Request.Cookies["loginInfo"];
      if(null == cookie)
      {
        if(!filterContext.HttpContext.Request.IsAjaxRequest())
        {
          filterContext.Result = new ContentResult()
          {
            Content = string
                 .Format("<script>alert(&#39;登录超时,请重新登录&#39;);location.href=&#39;{0}&#39;</script>","/admin/login/index")
          };
        }
        else
        {
          filterContext.Result = new JsonResult()
          {
            Data = new { logoff = true,logurl = "/admin/login/index" },
            ContentType = null,
            ContentEncoding = null,
            JsonRequestBehavior = JsonRequestBehavior.AllowGet
          };
        }
      }
      else
      {
        cookie.Expires = DateTime.Now.AddMinutes(30);
        HttpContext.Current.Response.Cookies.Remove("loginInfo");
        HttpContext.Current.Response.Cookies.Add(cookie);
      }
    }
  }

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