private void loadData()
    {
        try
        {
            Department department     = DB.GetDepartment(departmentId);
            int        numberEmployee = DB.GetNumberOfEmployees(departmentId, false);

            lblName.Text = department.Department_Name;
            lblDisplayDescription.Text = department.Department_Description;
            if (numberEmployee > 0)
            {
                lnkNumber.Visible = true;
            }
            else
            {
                lnkNumber.Visible = false;
            }
            lblNumberEmployee.Text = numberEmployee.ToString();

            hplnkDisplayModifyDepartment.NavigateUrl = WebHelper.Instance.GetURL() + "ManageSystem/Department/Modify/" + departmentId.ToString();
        }
        catch (Exception ex)
        {
            if (Session["return"] == null)
            {
                Session.Add("return", "null");
            }
            else
            {
                Session["return"] = "null";
            }
            Response.Redirect(WebHelper.Instance.GetURL() + "ManageSystem/Department/Manage");
        }
    }