private void SavePeriodButton_Click(object sender, RoutedEventArgs e)
{
if (!ReportedDatePicker.SelectedDate.HasValue ||
!Decimal.TryParse(xRateUSDToUAHTextBox.Text, out decimal xRateUSD) ||
!Decimal.TryParse(xRateEURToUAHTextBox.Text, out decimal xRateEUR))
{
return;
}
PeriodSummary newPeriodSummary = new PeriodSummary(ReportedDatePicker.SelectedDate.Value, xRateUSD, xRateEUR);
PeriodSummary result = _summaryService.AddPeriod(newPeriodSummary);
Periods.Add(result);
PeriodsListView.ItemsSource = Periods.OrderByDescending(p => p.ReportedDate);
}