Asp.net 中mvc 实现超时弹窗后跳转功能

作者：袖梨 2022-06-25

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

代码如下 复制代码

publicclassPowerFilter : AuthorizeAttribute

{

publicoverridevoidOnAuthorization(AuthorizationContext filterContext)

{

var cookie = HttpContext.Current.Request.Cookies["loginInfo"];

if(null== cookie)

{

filterContext.Result =newRedirectResult("/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

代码如下 复制代码

publicclassPowerFilter : AuthorizeAttribute

{

publicoverridevoidOnAuthorization(AuthorizationContext filterContext)

{

var cookie = HttpContext.Current.Request.Cookies["loginInfo"];

if(null== cookie)

{

filterContext.Result =newContentResult()

{

Content =string

.Format("

","/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?

代码如下 复制代码

publicclassPowerFilter : AuthorizeAttribute

{

publicoverridevoidOnAuthorization(AuthorizationContext filterContext)

{

var cookie = HttpContext.Current.Request.Cookies["loginInfo"];

if(null== cookie)

{

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

{

filterContext.Result =newContentResult()

{

Content =string

.Format("

","/admin/login/index")

};

}

else

{

filterContext.Result =newJsonResult()

{

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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