public void InitializeControl()
        {
            var s = bll.GetKhoaVaPhongDuocChiaTS_DAL();

            foreach (var i in s)
            {
                string t = i;
                if (cbbKhoa.FindStringExact(bll.GetTenKhoa_BLL(t.Substring(4, 3))) < 0)
                {
                    cbbKhoa.Items.Add(bll.GetTenKhoa_BLL(t.Substring(4, 3)));
                }
            }
            numericUpDownSoLuong.Minimum = 0;
            textBoxMaCTG.Text            = "02-TSCĐ-" + RandomString(8);
        }