private void btnThem_Click(object sender, EventArgs e)
        {
            Frm_ThongTinChucVu_Modifled frm_ThongTinChuc = new Frm_ThongTinChucVu_Modifled();

            frm_ThongTinChuc.Them = true;
            frm_ThongTinChuc.ShowDialog();
            HienThiDanhSachChucVu();
        }
        private void btnSua_Click(object sender, EventArgs e)
        {
            Frm_ThongTinChucVu_Modifled frm_ThongTinChucVu_Modifled = new Frm_ThongTinChucVu_Modifled();

            frm_ThongTinChucVu_Modifled.Them   = false;
            frm_ThongTinChucVu_Modifled.chucVu = chucVu;
            frm_ThongTinChucVu_Modifled.ShowDialog();
            HienThiDanhSachChucVu();
        }