会话在刷新页面后丢失

Question

我有这组代码，其中包含setsession和getsession

protected void btnCall_Click(Object sender, EventArgs e)
{
    if (isCallComplete())
    {
        Collection<Greeting> collGreeting = sessionHelper.GetSession("CurrentGreetingData") as Collection<Greeting>;
        if (collGreeting.Count > 0)
        {
            Collection<CounterbySA> collCounterBySA = new ServiceFacade(User).SelectByFieldName<CounterbySA>("SAID", 106);//CurrentApplicationUser.id
            if (collCounterBySA.Count > 0)
            {
                Counter counter = new ServiceFacade(User).SelectById<Counter>(collCounterBySA[0].CounterID);
                Greeting greeting = collGreeting[0];
                BoardQueue boardQueue = new BoardQueue();

                boardQueue.BranchID = CurrentApplicationUser.BranchID;
                boardQueue.CounterID = counter.ID;
                boardQueue.SAID = 106; //CurrentApplicationUser.ID
                boardQueue.PlatNumber = greeting.PlatNumber;
                boardQueue.Status = (int)CallCustomerStatus.Open;

                ResultStatus rs = new ServiceFacade(User).InsertBoardQueue(boardQueue);
                voiceCall(string.Format("{0}di{1}", greeting.PlatNumber, counter.Name));
                MessageBox.Show(string.Format("{0} Silahkan ke {1}", greeting.PlatNumber, counter.Name));

                btnCall.Enabled = false;
                btnReCall.Enabled = true;
                btnComplete.Enabled = true;

                sessionHelper.SetSession("CurrentCallData", boardQueue);
                sessionHelper.SetSession("CurrentGreetingTemp", greeting);
            }
            else
            {
                MessageBox.Show("SA ini Belom terdaftar di Loket, Silahkan ke manu AssignSA untuk mendaftarkan/menempatkan SA ke Loket");
            }
        }
        else
        {
            MessageBox.Show("Tidak Ada Customer Untuk Di panggil");
        }
    }
    else if (isCurrentUser())
    {
        MessageBox.Show("sedang memanggil customer, click panggil ulang apabila customer belum datang");

        btnCall.Enabled = true;
        btnReCall.Enabled = true;
        btnComplete.Enabled = true;
    }
    else
    {
        MessageBox.Show("SA lain sedang memanggil Customer, harap menunggu");
    }

所以，如果我点击按钮调用它将设置2 session 这就是我得到会议的地方

protected void btnReCall_Click(Object sender, EventArgs e)
{
    BoardQueue boardQueue = sessionHelper.GetSession("CurrentCallData") as BoardQueue;
    if (boardQueue != null)
    {
        Counter counter = new ServiceFacade(User).SelectById<Counter>(boardQueue.CounterID);
        voiceCall(string.Format("{0}di{1}", boardQueue.PlatNumber, counter.Name));
        MessageBox.Show(string.Format("{0} Silahkan ke {1}", boardQueue.PlatNumber, counter.Name));

        btnNext.Enabled = true;
    }
    else
    {
        MessageBox.Show("Harap Memanggil Customer terlebih Dahulu");
    }

}

在页面刷新之前，它可以正常工作。但在页面刷新后会话消失了。

我已经对这个主题做了一些研究，但我无法得到答案

以下是会话的get和set方法

    public void SetSession(string sKey, object sValue)
    {
        HttpContext.Current.Session[sKey] = sValue;
        AddSession(sKey, true);
    }

    public object GetSession(string sKey)
    {
        return ((object)(HttpContext.Current.Session[sKey]));
    }