private async void SendQuestion(object sender, EventArgs e) { if (string.IsNullOrEmpty(model.QuestionContent)) { await Application.Current.MainPage.DisplayAlert("Greška", "Morate unijeti tekst pitanja!", "OK"); return; } await model.SendQuestion(); var modelC = model.modelCommunication; if (modelC != null) { await Application.Current.MainPage.DisplayAlert("Pitanje poslano", "Uspješno ste postavili pitanje.", "OK"); } model.Load(); }