protected async override void OnAppearing()
{
FirebaseService firebaseService = new FirebaseService();
var surveyList = await firebaseService.GetSurveys();
ObservableCollection <Survey> surveys = new ObservableCollection <Survey>(surveyList);
SurveysView.ItemsSource = surveys;
if (surveys.Count == 0)
{
EmptyLabel.Text = "Henüz eklenmiş bir anket mevcut değil";
EmptyLabel.IsVisible = true;
SurveysView.IsVisible = false;
}
base.OnAppearing();
}