DispatcherTimer不工作asp.net

Question

好的，所以我希望能够记录用户花费多长时间使用该应用程序，并且我将从用户按下按钮然后结束计时器的那一刻开始计时饰面。然后显示，任何人都请帮助我！谢谢！

    public void timeSpent()
{    


DispatcherTimer dispatcherTimer = new DispatcherTimer();
    dispatcherTimer.Interval = new TimeSpan(0, 0, 1); 
    dispatcherTimer.Tick += new EventHandler(dispatcherTimer_Tick);
    dispatcherTimer.Start();

}

---

protected void Application_Start(object sender, EventArgs e)
    {
        Application["timeSpent"] = 0;

    }

    protected void Session_Start(object sender, EventArgs e)
    {

    }

    protected void Application_BeginRequest(object sender, EventArgs e)
    {

    }

    protected void Application_AuthenticateRequest(object sender, EventArgs e)
    {

    }

    protected void Application_Error(object sender, EventArgs e)
    {

    }

    protected void Session_End(object sender, EventArgs e)
    {

    }

    protected void Application_End(object sender, EventArgs e)
    {

    }

我使用global.asax存储它们，我可以把那些代码放在那里吗？谢谢！的