public JsonResult GetTaskFrequencyDistributionChart(string startTime, string endTime)
        {
            List <TaskFrequencyDistributionChart> ModelList = DbFunction.GetTaskFrequencyDistributionChart(startTime, endTime);
            List <TaskFrequencyDistributionJson>  JsonList  = new List <TaskFrequencyDistributionJson>();

            for (int i = 0; i < ModelList.Count; i++)
            {
                List <int> IntList   = new List <int>();
                string[]   Hour_Arr  = ModelList[i].Hours.Split(',');
                string[]   Total_Arr = ModelList[i].Totals.Split(',');
                for (int j = 0; j < 24; j++)
                {
                    IntList.Add(0);
                    string timeStr = String.Format("'{0:D2}:00'", j);
                    for (int k = 0; k < Hour_Arr.Length; k++)
                    {
                        if (Hour_Arr[k] == timeStr)
                        {
                            IntList[j] = Convert.ToInt32(Total_Arr[k]);
                        }
                    }
                }
                JsonList.Add(new TaskFrequencyDistributionJson()
                {
                    name = ModelList[i].DepartmentName, data = IntList
                });
            }
            return(Json(JsonList));
        }