Dapper合並查詢多條sql語句，並讀取結果集

try
            {
                using (SqlConnection conn = new SqlConnection(conStr))
                {
                    var year = req.sysmonth!=null?Convert.ToInt32(req.sysmonth.Substring(0, 4)) :DateTime.Now.Year;
                    var lyear = year - 1;
                    var smonth = "";
                    var sql = "";
                    int month = 0;
                    decimal total = 0;
                    decimal total1 = 0;
                    IncomeContrastivebyYear listy = new IncomeContrastivebyYear();
                    listy.syear = year;
                    IncomeContrastivebyYear listly = new IncomeContrastivebyYear();
                    listly.syear = lyear;
                    // 遍歷月份
                    while (month < 12)
                    {
                        month++;
                        smonth = CommonUtil.RightStr(("00" + month.ToString()), 2);
                        if (req.classid == "123") {
                            sql = $@"select total = isnull(SUM(day),0) from rep_hotel_all where charindex(rtrim(hotelid), '{ hotelids }')>0 
                                and class in (012000,030000,040000,050000,060000,070000,080000,090000) and syear='{ year }' and smonth='{ smonth }';
                                     select total = isnull(SUM(day),0) from rep_hotel_all where charindex(rtrim(hotelid), '{ hotelids }')>0
                                and class in (012000,030000,040000,050000,060000,070000,080000,090000) and syear='{ lyear }' and smonth='{ smonth }';";
                        }
                        else
                        {
                            sql = $@"select total = isnull(SUM(day),0) from rep_hotel_all where charindex(rtrim(hotelid), '{ hotelids }')>0 
                            and class='{ req.classid }' and syear='{ year }' and smonth='{ smonth }';
                                     select total = isnull(SUM(day),0) from rep_hotel_all where charindex(rtrim(hotelid), '{ hotelids }')>0 
                            and class='{ req.classid }' and syear='{ lyear }' and smonth='{ smonth }';";
                        }
                        using (var results = conn.QueryMultiple(sql))
                        {
                            var j = 0;
                            // 遍歷結果集，走兩遍，第一遍返回total，第二遍返回total1
                            while(!results.IsConsumed)
                            {
                                j++;
                                // 讀取當前結果集
                                var resb = results.Read<TotalTotal1Res>().ToList().FirstOrDefault();
                                if (resb != null)
                                {
                                    if (j == 1)
                                    {
                                        total = resb.total;
                                    }
                                    else
                                    {
                                        total1 = resb.total;
                                    }
                                }
                                else
                                {
                                    if (j == 1)
                                    {
                                        total = 0;
                                    }
                                    else
                                    {
                                        total1 = 0;
                                    }
                                }
                            }
                        }
                        if (month == 01)
                        {
                            listy.jan = total;
                            listly.jan = total1;
                        }
                        if (month == 02)
                        {
                            listy.feb = total;
                            listly.feb = total1;
                        }
                        if (month == 03)
                        {
                            listy.mar = total;
                            listly.mar = total1;
                        }
                        if (month == 04)
                        {
                            listy.apr = total;
                            listly.apr = total1;
                        }
                        if (month == 05)
                        {
                            listy.may = total;
                            listly.may = total1;
                        }
                        if (month == 06)
                        {
                            listy.jun = total;
                            listly.jun = total1;
                        }
                        if (month == 07)
                        {
                            listy.jul = total;
                            listly.jul = total1;
                        }
                        if (month == 08)
                        {
                            listy.aug = total;
                            listly.aug = total1;
                        }
                        if (month == 09)
                        {
                            listy.sep = total;
                            listly.sep = total1;
                        }
                        if (month == 10)
                        {
                            listy.oct = total;
                            listly.oct = total1;
                        }
                        if (month == 11)
                        {
                            listy.nov = total;
                            listly.nov = total1;
                        }
                        if (month == 12)
                        {
                            listy.dec = total;
                            listly.dec = total1;
                        }
                    }
                    list.Add(listy);
                    list.Add(listly);
                    result.Result = list;
                    result.TotalRecords = list.Count();
                    return Success(result);
                }
            }
            catch (Exception ex)
            {
                return Failed(ex.Message);
            }

備注：僅做多條同時查詢的示例，鑒於效率因素，實際查詢仍采用其他優化方法。