public ChangeExecuteDateDialogViewModel(RequestServiceImpl.RequestService requestService, int requestId)
{
_requestService = requestService;
_requestId = requestId;
PeriodList = new ObservableCollection <PeriodDto>(_requestService.GetPeriods());
var request = _requestService.GetRequest(_requestId);
if (request.ExecuteDate.HasValue && request.ExecuteDate.Value.Date > DateTime.MinValue)
{
SelectedDateTime = request.ExecuteDate.Value.Date;
SelectedPeriod = PeriodList.SingleOrDefault(i => i.Id == request.PeriodId);
OldDateTime = SelectedDateTime;
OldPeriod = SelectedPeriod;
}
Refresh(null);
}