public void Reset()
        {
            txtMaDDH.ResetText();

            txtNCC.Properties.DataSource    = nccBLL.LayDanhSach();
            txtNCC.Properties.DisplayMember = "Ten";
            txtNCC.Properties.ValueMember   = "MaNCC";

            txtNhanVien.Text = TaiKhoanBLL.TaiKhoanDaDangNhap().NhanVien.Ten;
            dtpNgayThem.ResetText();

            gridControl2.DataSource = null;
        }
 public void CapNhat()
 {
     gridControl1.DataSource = nccBLL.LayDanhSach();
 }