private void get_id_gd_diem(US_DUNG_CHUNG v_us_dc, decimal v_id_ns, decimal v_id_gdlm, DataRow v_dt_r, ref int v_int_khong_nhap_duoc, DataRow v_data_row, ref decimal v_count)
        {
            DataSet v_ds = new DataSet();
            v_ds.Tables.Add(new DataTable());
            v_us_dc.FillDatasetWithQuery(v_ds, "SELECT * FROM GD_DIEM WHERE ID_NHAN_VIEN=" + v_id_ns.ToString() + " AND ID_LOP_MON=" + v_id_gdlm.ToString());
            if (v_ds.Tables[0].Rows.Count == 0)
            {
                MessageBox.Show("Nhân viên này chưa có tên trong lớp môn này");

            }
            v_dt_r = v_ds.Tables[0].Rows[0];

            decimal v_id_gdd = CIPConvert.ToDecimal(v_dt_r["ID"].ToString());
            US_GD_DIEM v_us_gdd = new US_GD_DIEM(v_id_gdd);
            if (v_us_gdd.dcDIEM_CHUYEN_CAN.ToString() == "")
            {
                v_us_gdd.IsDIEM_CHUYEN_CANNull();
            }
            else
            {
                v_us_gdd.dcDIEM_CHUYEN_CAN = CIPConvert.ToDecimal(v_data_row["DIEM_CHUYEN_CAN"].ToString());
            }
            if (v_us_gdd.dcDIEM_THI.ToString() == "")
            {
                v_us_gdd.IsDIEM_THINull();
            }
            else
            {
                v_us_gdd.dcDIEM_THI = CIPConvert.ToDecimal(v_data_row["DIEM_KIEM_TRA"].ToString());
            }
            if (v_us_gdd.dcDIEM_KIEM_TRA.ToString()=="")
            {
                v_us_gdd.IsDIEM_KIEM_TRANull();
            }
            else
            {
                v_us_gdd.dcDIEM_KIEM_TRA = CIPConvert.ToDecimal(v_data_row["DIEM_THI"].ToString());
            }

            v_us_gdd.strQUA_MON = v_data_row["KET_QUA"].ToString();
            v_us_gdd.datNGAY_SUA = DateTime.Now.Date;
            v_us_gdd.strHOC_XONG_YN = "Y";
            v_us_gdd.Update();
            try
            {
                v_us_gdd.Update();
                v_data_row.Delete();

                v_count++;
            }
            catch (Exception)
            {

                MessageBox.Show("Lỗi!");
                v_int_khong_nhap_duoc++;
            }
        }