private void OnUserInviteButtonClicked(object sender, System.Windows.RoutedEventArgs e) { var username = UserTextBox.Text; string factoryString = (string)FactoryDropdown.SelectedItem; int factoryID = HelperFunctions.GetIdFromFactoryString(factoryString); String message = "User " + username + " konnte nicht hinzugefügt werden."; Boolean success = csu.AddMemberToMemberAccess(factoryID, username); if (success) { message = "User " + username + " wurde erfolgreich zu " + factoryString + " hinzugefügt"; } ShowPopUp(message); UserTextBox.Clear(); }