private async Task RouteSearch()
{
if (SelectedAirline == null)
{
RouteSearchResult = new List <RouteInfo>();
}
else if (SelectedAirport == null)
{
RouteSearchResult = await m_crudManager.GetRoutes(SelectedAirline.IataAirlineCode);
}
else
{
RouteSearchResult = await m_crudManager.GetRoutes(SelectedAirline.IataAirlineCode, SelectedAirport.IataAirportCode);
}
}