private void AddJourneyStation_Click(object sender, EventArgs e) { if (NewJourneyStation.Text.Trim() == string.Empty) { RegisterStartupScriptIfNeeded("StationEmpty", string.Format(pbHelpers.JavaScriptAlertString, "Der Routenpunkt darf nicht leer sein!")); return; } Subscription subscription = JourneySubscription; subscription.AddStation(new JourneyStation(NewJourneyStation.Text.Trim(), "", JourneySubscription.JourneyStations.Count + 1)); NewJourneyStation.Text = string.Empty; }