public int Insert(CT_BDM_HKDTO Ct_bdm_hk)
 {
     string sql = "insert into CT_BDM_HK values (@MaBDM_HK,@Diem15Phut,@DiemMieng,@Diem1Tiet,@DiemHK)";
     SqlParameter[] sp = new SqlParameter[5];
        sp[0] = new SqlParameter("@MaBDM_HK", Ct_bdm_hk.MaBD_HK);
        sp[1] = new SqlParameter("@Diem15Phut", Ct_bdm_hk.Diem15Phut);
        sp[2] = new SqlParameter("@DiemMieng", Ct_bdm_hk.DiemMieng);
        sp[3] = new SqlParameter("@Diem1Tiet", Ct_bdm_hk.Diem1Tiet);
        sp[4] = new SqlParameter("@DiemHK", Ct_bdm_hk.DiemHK);
     return conectData.Insert_Update_Delete(sql, sp);
 }
 // update diem 15phut, mieng, 1 tiet dua vao ma BDM_HK, co ham lay MaBDM_HK trong gile BDM_HKdao
 public int Update(CT_BDM_HKDTO Ct_bdm_hk)
 {
     string sql = "update CT_BDM_HK set Diem15Phut=@Diem15Phut,DiemMieng=@DiemMieng,Diem1Tiet=@Diem1Tiet, DiemHK=@DiemHK where  MaBDM_HK=@MaBDM_HK";
     SqlParameter[] sp = new SqlParameter[5];
     sp[0] = new SqlParameter("@MaBDM_HK", Ct_bdm_hk.MaBD_HK);
     sp[1] = new SqlParameter("@Diem15Phut", Ct_bdm_hk.Diem15Phut);
     sp[2] = new SqlParameter("@DiemMieng", Ct_bdm_hk.DiemMieng);
     sp[3] = new SqlParameter("@Diem1Tiet", Ct_bdm_hk.Diem1Tiet);
     sp[4] = new SqlParameter("@DiemHK", Ct_bdm_hk.DiemHK);
     return conectData.Insert_Update_Delete(sql, sp);
 }