会话超时.NET

Question

我搜索了但是我找不到这个问题的具体答案.在会话到期之前,如何在服务器中获得剩余时间？我的会话设置:

//超时,例如10分钟.

<authentication mode="Forms"> <forms name=".ASPXAUTH_External" loginUrl="Authentication/Unauthorized.aspx" protection="All" timeout="10" path="/" slidingExpiration="true" defaultUrl="~/Pages/home.aspx" cookieless="UseDeviceProfile" enableCrossAppRedirects="false"/>
</authentication>
<sessionState mode="InProc" timeout="10">
</sessionState>

我得到初始值(它会得到10*60 = 600秒):

SessionStateSection sessionSection = (SessionStateSection)WebConfigurationManager.GetSection("system.web/sessionState");
countdown.Text = sessionSection.Timeout.TotalSeconds.ToString();

但是当会话时间少于一半时,用户会做一些动作.我得到初始值600,但它不等于左会话时间,因为"slidingExpiration" 增加了一些时间(我不知道多少),但不会将会话剩余时间重置为开始10分钟.

如何在到期前获得剩余的会话时间？

Answer 1

我发现会话过期时间可以这样得到：

DateTime dateNow = DateTime.Now;
if (HttpContext.Current.User.Identity is FormsIdentity)
{
    HttpCookie authCookie = this.Context.Request.Cookies[FormsAuthentication.FormsCookieName];
    FormsAuthenticationTicket authTicket = FormsAuthentication.Decrypt(authCookie.Value);
    double leftSeconds = (authTicket.Expiration - dateNow).TotalSeconds;
    // Control in MasterPage, where I setting value ant then taking for JavaSript to CountDown message
    countdown.Text = leftSeconds > 0 ? leftSeconds.ToString() : "0";
}