public JsonResult PieChartIndex()
        {
            var nostart = _dataSheetService.GetDataSheetCities();

            var istanbul = nostart.Where(k => k.CityId == 34).Count();
            var denizli  = nostart.Where(k => k.CityId == 20).Count();
            var izmir    = nostart.Where(k => k.CityId == 35).Count();
            var diger    = nostart.Where(k => k.CityId != 34 && k.CityId != 20 && k.CityId != 35).Count();

            List <PieChart> pieCharts = new List <PieChart>();

            if (istanbul > 0)
            {
                pieCharts.Add(new PieChart
                {
                    Color     = "rgba(0, 86, 133, 1)",
                    Highlight = "rgba(169, 3, 41, 0.7)",
                    Result    = istanbul,
                    Label     = "İstanbul"
                });
            }
            if (denizli > 0)
            {
                pieCharts.Add(new PieChart
                {
                    Color     = "rgba(194, 68, 0, 1)",
                    Highlight = "rgba(151,187,205,0.8)",
                    Result    = denizli,
                    Label     = "Denizli"
                });
            }
            if (izmir > 0)
            {
                pieCharts.Add(new PieChart
                {
                    Color     = "rgba(104, 95, 90, 1)",
                    Highlight = "rgba(151,187,205,0.8)",
                    Result    = izmir,
                    Label     = "İzmir"
                });
            }
            if (diger > 0)
            {
                pieCharts.Add(new PieChart
                {
                    Color     = "rgba(151,187,205,1)",
                    Highlight = "rgba(151,187,205,0.8)",
                    Result    = diger,
                    Label     = "Diğer"
                });
            }

            return(Json(pieCharts));
        }