ArcGISPortalViewer.ViewModel.AppViewModel.ExecuteOpenMapCommand C# (CSharp) Method

        private void ExecuteOpenMapCommand(ArcGISPortalItem portalItem)
        {
            if (portalItem == null)
            {
                throw new Exception("ArcGIS Portal Item is null or not selected");
            }

            (new NavigationService()).Navigate(App.MapPageName, portalItem);
        }