/// <summary>
    /// 获取客户的会话状态
    /// </summary>
    /// <param name="sender"></param>
    /// <param name="e"></param>
    protected void btnGetSession_Click(object sender, EventArgs e)
    {
        string          userName = lbPublicAccount.SelectedValue;
        string          openId   = lbSession.SelectedIndex >= 0 ? lbSession.SelectedValue : "";
        ErrorMessage    errorMessage;
        CustomerSession session = CustomerService.GetSession(userName, openId, out errorMessage);

        if (errorMessage.IsSuccess)
        {
            ltrMessage.Text = string.Format("获取客户的会话状态成功。{0}", session != null ? session.ToString() : "");
        }
        else
        {
            ltrMessage.Text = string.Format("获取客户的会话状态失败。{0}", errorMessage);
        }
    }