Asp.net 中mvc 实现超时弹窗后跳转功能

为了实现保持登录状态,可以用cookie来解决这一问题

假设过期时间为30分钟,校验发生在服务器,借助过滤器,可以这样写

 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);      }    }  }

但是页面直接跳转了,也没有一个提示,显得不是很友好,可以这样

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('登录超时,请重新登录');location.href='{0}'</script>","/admin/login/index")        };      }      else      {        cookie.Expires = DateTime.Now.AddMinutes(30);        HttpContext.Current.Response.Cookies.Remove("loginInfo");        HttpContext.Current.Response.Cookies.Add(cookie);      }    }  }}

但是,假如是ajax请求呢?

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('登录超时,请重新登录');location.href='{0}'</script>","/admin/login/index")          };        }        else        {          filterContext.Result = new JsonResult()          {            Data = new { loff = 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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