统计某个月每天的数据

private object FindDayDataByYearMonth(DateTime thisTime,
            List<DailyDialysisWayStatistic> baseStatisticsList, List<string> dialysisWayList)
        {
            //源格式：天-透析方式-数量
            List<Tuple<string, object>> tupleList = new List<Tuple<string, object>>();

           //获取某个月的天数
            var days = DateTime.DaysInMonth(thisTime.Year, thisTime.Month);
            dialysisWayList.ForEach(y =>
            {
                int[] countGroups = new int[days];
                for (int i = 1; i <= days; i++)
                {
                  //构建每天的日期
                    var tempTime = new DateTime(thisTime.Year, thisTime.Month, i);
                    var count = baseStatisticsList.Where(z => z.DialysisWay == y && z.DialysisDate == tempTime).Sum(x => x.Frequency);
                    countGroups[i - 1] = count;
                }
                tupleList.Add(new Tuple<string, object>(y, countGroups));
            });

            var dayIndexs = GetEveryDayIndex(days);
            return new { dayIndexs, tupleList };
        }

/// <summary>
/// 获取传入值得从0->N 累计序列
/// </summary>
/// <param name="num"></param>
/// <returns></returns>
private int[] GetEveryDayIndex(int num)
{
if (num <= 0)
return null;

int[] days = new int[num];
for (int i = 1; i <= num; i++)
{
days[i - 1] = i;
}
return days;
}

结果：

dayIndexs                            tupleList