测试代码变色

public string adddata_collect_shoufu(MODEL.M_data_collect M_data_collect, SqlConnection conn, SqlTransaction transaction)
        {
            StringBuilder result = new StringBuilder("");
            DataTable dtfact = sqlhelp.getresult("select * from data_shoufu_fact where data_id = " + M_data_collect.Data_id + " order by id desc", conn, transaction).Tables[0];
            DataTable dtcontract = sqlhelp.getresult("select * from data_shoufu_contract where data_id = " + M_data_collect.Data_id + " order by promise_date", conn, transaction).Tables[0];
            MODEL.M_data_detail M_data_detail = B_data_detail.GetDataCreditInfo(M_data_collect.Data_id, conn, transaction);
            MODEL.M_data_shoufu_fact M_data_shoufu_fact = new M_data_shoufu_fact();
            M_data_shoufu_fact.Data_id = M_data_collect.Data_id;
            M_data_shoufu_fact.Fact_date = M_data_collect.Fact_date;
            M_data_shoufu_fact.Fact_money = M_data_collect.Fact_money;
            M_data_shoufu_fact.Collect_id = M_data_collect.Id;
            M_data_shoufu_fact.Remark = M_data_collect.Remark;
            M_data_shoufu_fact.Createtime = DateTime.Now;
            M_data_shoufu_fact.Updatetime = DateTime.Now;
            M_data_shoufu_fact.Createuser = M_data_collect.Createuser;
            if (dtfact.Rows.Count == 0)
            {
                result.Append(addfact(dtcontract, M_data_shoufu_fact, conn, transaction));
            }
            else
            {
                float left_debt = float.Parse(dtfact.Rows[0]["left_debt"].ToString());
                int shoufu_id = Convert.ToInt32(dtfact.Rows[0]["shoufu_id"].ToString());
                if (left_debt == 0)
                {
                    DataTable dtcontractsurplus = new DataTable();
                    dtcontractsurplus = dtcontract.Clone();
                    DataRow[] drs = dtcontract.Select("id>" + shoufu_id + "");
                    for (int k = 0; k < drs.Length; k++)
                    {
                        dtcontractsurplus.ImportRow((DataRow)drs[k]);
                    }
                    result.Append(addfact(dtcontractsurplus, M_data_shoufu_fact, conn, transaction));
                }
                else
                {
                    if (M_data_shoufu_fact.Fact_money < left_debt)
                    {
                        M_data_shoufu_fact.Shoufu_id = shoufu_id;
                        M_data_shoufu_fact.Left_debt = left_debt - M_data_shoufu_fact.Fact_money;
                        //DateTime promise_date = DateTime.Parse(dtfact.Rows[0]["fact_date"].ToString());
                        DateTime promise_date = DateTime.Parse((dtcontract.Select(" id=" + shoufu_id + ""))[0]["promise_date"].ToString());
                        if (M_data_shoufu_fact.Fact_date > promise_date)
                        {
                            //M_data_shoufu_fact.Late_punitive = M_data_shoufu_fact.Fact_date.Subtract(promise_date).Days * left_debt / 10000 * 3;
                            //M_data_shoufu_fact.Late_punitive = M_data_shoufu_fact.Fact_date.Subtract(promise_date).Days * M_data_shoufu_fact.Fact_money / 10000 * 3;
                            M_data_shoufu_fact.Late_punitive = commenBLL.GetPunitive(promise_date, M_data_shoufu_fact.Fact_date, M_data_shoufu_fact.Fact_money);
                        }
                        else
                        {
                            M_data_shoufu_fact.Late_punitive = 0;
                        }
                        D_data_excel.adddata_shoufu_fact(M_data_shoufu_fact, conn, transaction);
                    }
                    else
                    {
                        MODEL.M_data_shoufu_fact M_data_shoufu_fact1 = new M_data_shoufu_fact();
                        M_data_shoufu_fact1.Data_id = M_data_shoufu_fact.Data_id;
                        M_data_shoufu_fact1.Shoufu_id = shoufu_id;
                        M_data_shoufu_fact1.Collect_id = M_data_shoufu_fact.Collect_id;
                        M_data_shoufu_fact1.Left_debt = 0;
                        M_data_shoufu_fact1.Fact_date = M_data_shoufu_fact.Fact_date;
                        M_data_shoufu_fact1.Fact_money = left_debt;
                        M_data_shoufu_fact1.Createtime = M_data_shoufu_fact.Createtime;
                        M_data_shoufu_fact1.Updatetime = M_data_shoufu_fact.Updatetime;
                        M_data_shoufu_fact1.Createuser = M_data_shoufu_fact.Createuser;
                        M_data_shoufu_fact1.Remark = M_data_shoufu_fact.Remark;

                        //DateTime promise_date = DateTime.Parse(dtfact.Rows[0]["fact_date"].ToString());
                        DateTime promise_date = DateTime.Parse((dtcontract.Select(" id=" + shoufu_id + ""))[0]["promise_date"].ToString());
                        if (M_data_shoufu_fact1.Fact_date > promise_date)
                        {
                            //M_data_shoufu_fact1.Late_punitive = M_data_shoufu_fact1.Fact_date.Subtract(promise_date).Days * M_data_shoufu_fact1.Fact_money / 10000 * 3;
                            //M_data_shoufu_fact1.Late_punitive = M_data_shoufu_fact1.Fact_date.Subtract(promise_date).Days * M_data_shoufu_fact1.Fact_money / 10000 * 3;
                            M_data_shoufu_fact1.Late_punitive = commenBLL.GetPunitive(promise_date, M_data_shoufu_fact.Fact_date, M_data_shoufu_fact.Fact_money);
                        }
                        else
                        {
                            M_data_shoufu_fact1.Late_punitive = 0;
                        }

                        D_data_excel.adddata_shoufu_fact(M_data_shoufu_fact1, conn, transaction);
                        M_data_shoufu_fact.Fact_money -= left_debt;
                        DataTable dtcontractsurplus = new DataTable();
                        dtcontractsurplus = dtcontract.Clone();
                        DataRow[] drs = dtcontract.Select("id>" + shoufu_id + "");
                        for (int k = 0; k < drs.Length; k++)
                        {
                            dtcontractsurplus.ImportRow((DataRow)drs[k]);
                        }
                        result.Append(addfact(dtcontractsurplus, M_data_shoufu_fact, conn, transaction));
                    }
                }
            }

            M_data_detail.Createtime = DateTime.Now;
            M_data_detail.Total_shoufu_leftmoney = D_data.GetTotalShoufuLeftMoney(M_data_collect.Data_id, conn, transaction);
            M_data_detail.Left_debt = M_data_detail.Total_shoufu_leftmoney + M_data_detail.Total_com_leftmoney;
            M_data_detail.Total_leftmoney = M_data_detail.Left_debt + M_data_detail.Bank_left_debt + M_data_detail.Com_left_debt;
            M_data_detail.ChangeStatus = B_data_detail.ChangeMoneyStatus(M_data_detail.ChangeStatus, "total_shoufu_leftmoney");
            M_data_detail.ChangeStatus = B_data_detail.ChangeMoneyStatus(M_data_detail.ChangeStatus, "left_debt");
            M_data_detail.ChangeStatus = B_data_detail.ChangeMoneyStatus(M_data_detail.ChangeStatus, "total_leftmoney");
            D_data_detail.AddDataDetail(M_data_detail, conn, transaction);



            DataTable dtfactnew = sqlhelp.getresult("select * from data_shoufu_fact where data_id = " + M_data_collect.Data_id + "", conn, transaction).Tables[0];
            float moneyresult = B_data.updashou_fact(dtfactnew, M_data_collect.Late_Punitive, conn, transaction);
            if (moneyresult > 0)
            {
                result.Append("罚息金额大于需要还的罚息金额，收款失败！");
            }
            return result.ToString();
        }

private  DataTable ExcelToDataTableFirstRowAsHeader(HSSFSheet sheet, HSSFFormulaEvaluator evaluator)
{
    using (DataTable dt = new DataTable())
    {
        HSSFRow firstRow = sheet.GetRow(0) as HSSFRow;
        int cellCount = GetCellCount(sheet);

        for (int i = 0; i < cellCount; i++)
        {
            if (firstRow.GetCell(i) != null)
            {
                dt.Columns.Add(firstRow.GetCell(i).StringCellValue ?? string.Format("F{0}", i + 1), typeof(string));
            }
            else
            {
                dt.Columns.Add(string.Format("F{0}", i + 1).Trim(), typeof(string));
            }
        }

        for (int i = 1; i <= sheet.LastRowNum; i++)
        {
            HSSFRow row = sheet.GetRow(i) as HSSFRow;
            DataRow dr = dt.NewRow();
            FillDataRowByHSSFRow(row, evaluator, ref dr);
            dt.Rows.Add(dr);
        }

        dt.TableName = sheet.SheetName;
        return dt;
    }
}