public async Task <IActionResult> IndexAsync()
{
List <DateTime> months = this.GetFirstOfAllSolarMonth();
string ChartData = "[";
for (int i = 0; i < months.Count - 1; i++)
{
double sum = 0;
var transactions = await sponsors.GetFromToTransactionAsync(months[i], months[i + 1]);
sum = transactions
.Select(x =>
(x.MyTransaction?.Amount ?? 0) + (x.MyReceipt?.Amount ?? 0))
.Sum();
ChartData += sum.ToString();
ChartData += ", ";
}
ChartData = ChartData.Substring(0, ChartData.Length - 1) + "]";
ViewBag.ChartData = ChartData;
ViewBag.ColleaguesCount = colleagues.Count();
ViewBag.SponsorsCount = sponsors.Count();
return(View());
}