private async void AddSubEventPage(EventView view, string subEventTitle)
        {
            using (UserDialogs.Instance.Loading("loading"))
            {
                await Task.Delay(1);

                ContentStackLayout.Children.Clear();
                var view2 = new SubEventsView(subEventTitle);
                await view2.ListViewAttemp();

                ContentStackLayout.Children.Add(view2);
            }
        }
        private async void AlertAndNewEvents(SubEventsView view, List <string> listOfAppointmentCredentials)
        {
            var answer = await DisplayAlert("onecommunity.com says:", $"Are you sure you want to make an appointment for {listOfAppointmentCredentials[0]} at {listOfAppointmentCredentials[1]}", "OK", "Cancel");

            if (!answer)
            {
                return;
            }
            await ApiService.Instance.GetDataFromServerTask <AppointmentMobileRequestModel, AppointmentMobileResponseModel>(new AppointmentMobileRequestModel()
            {
                ScreeningSubperiodId = listOfAppointmentCredentials[2],
                ProgramId            = AppSettingHelper.ProgramId,
                ParticipantId        = AppSettingHelper.ParticipantId
            }, ApiConstants.AddAppointmentUrl);

            await GetEventView();
        }