protected void Page_Load(object sender, EventArgs e)
        {
            if (!IsPostBack)
            {
                if (Request.QueryString["do"] != null)
                {
                    StationeryStoreInventorySystemController.commonController.LogOutControl logoutControl = new StationeryStoreInventorySystemController.commonController.LogOutControl();

                    removeAllSession();
                }
                else
                {
                    lblLoggedinTime.Text = "Log-in Time: " + SystemStoreInventorySystemUtil.Converter.dateTimeToString(SystemStoreInventorySystemUtil.Converter.DATE_CONVERTER.DATETIME, DateTime.Now);
                    if (StationeryStoreInventorySystemController.Util.EmployeeName() != null)
                    {
                        lblUserName.Text = "Welcome, " + StationeryStoreInventorySystemController.Util.EmployeeName();
                    }
                    LoadNavigationMenu();
                    //removeAllSession(); // remove all session stored (open a new page)
                }
            }
        }
        protected void Page_Load(object sender, EventArgs e)
        {
            if (!IsPostBack)
            {
                if (Request.QueryString["do"] != null)
                {
                    StationeryStoreInventorySystemController.commonController.LogOutControl logoutControl = new StationeryStoreInventorySystemController.commonController.LogOutControl();

                    removeAllSession();
                }
                else
                {
                    lblLoggedinTime.Text = "Log-in Time: " + SystemStoreInventorySystemUtil.Converter.dateTimeToString(SystemStoreInventorySystemUtil.Converter.DATE_CONVERTER.DATETIME, DateTime.Now);
                    if (StationeryStoreInventorySystemController.Util.EmployeeName() != null)
                    {
                        lblUserName.Text = "Welcome, " + StationeryStoreInventorySystemController.Util.EmployeeName();
                    }
                    LoadNavigationMenu();
                    //removeAllSession(); // remove all session stored (open a new page)
                }
            }
        }