public NonMobileUserPopupPageViewModel(IRegionManager regionManager, IEventAggregator eventAggregator, IWindowsManager windowsManager, ILocationManager locationManager) : base(regionManager) { _eventAggregator = eventAggregator; _windowsManager = windowsManager; _locationManager = locationManager; this.CancelCommand = new DelegateCommand(() => ExecuteCancelCommand()); this.FillCommand = new DelegateCommand(async() => await ExecuteFillCommand()); this.CountriesSelectionChangedCommand = new DelegateCommand(() => ExecuteCountriesSelectionChangedCommand()); this.StatesSelectionChangedCommand = new DelegateCommand(() => ExecuteStatesSelectionChangedCommand()); if (this.Countries == null) { this.Countries = _locationManager.GetCountries(); this.SelectedCountry = this.Countries.FirstOrDefault(); PostalCodePlaceholder = this.SelectedCountry.Id == 231 ? "Zip Code" : "Postal Code"; } if (this.States == null && this.SelectedCountry != null) { var states = _locationManager.GetStates(); this.States = states.Where(x => x.CountryId == this.SelectedCountry.Id).ToList(); this.SelectedState = this.States.FirstOrDefault(); } if (this.Cities == null && this.SelectedState != null) { var cities = _locationManager.GetCities(); this.Cities = cities.Where(x => x.StateId == this.SelectedState.Id).ToList(); this.SelectedCity = this.Cities.FirstOrDefault(); } }