public frmDeTai()
        {
            InitializeComponent();
            this.cMaDeTai.DataPropertyName  = nameof(DeTai.MaDT);
            this.cTenDT.DataPropertyName    = nameof(DeTai.TenDT);
            this.cLoaiDT.DataPropertyName   = nameof(DeTai.LoaiDT);
            this.cNhom.DataPropertyName     = nameof(DeTai.MaNhom);
            this.cGiaoVien.DataPropertyName = nameof(DeTai.MaGV);
            this.cNoiDung.DataPropertyName  = nameof(DeTai.NoiDung);

            BindingSource source = new BindingSource();

            source.DataSource             = DeTaiController.getListDT();
            this.dataGridView1.DataSource = source;
            //  dgrDSSV.AutoGenerateColumns = false;

            List <Nhom> searchnhom = SinhVienController.getListNhom();

            for (int i = 0; i < searchnhom.Count; i++)
            {
                this.cboNhom.Items.Add(searchnhom[i]);
            }
            List <GiaoVien> searchgiaovien = GiaoVienController.getListgiaovien();

            for (int i = 0; i < searchgiaovien.Count; i++)
            {
                this.cboGiaoVien.Items.Add(searchgiaovien[i]);
            }
        }