Ich versuche, Länder mit mindestens einem Namen ihrer Städte in einer anderen (gelieferten) Liste auszuwählen. Sorry schwer zu erklären, bitte siehe Code unten:Linq Abfrage - Liste in einer anderen Liste
Wenn ich GetListOfCountires aufrufen, sollte es NZ und CN zurückgeben. Auch ich möchte Linq anstelle von foreach verwenden.
private static List<Country> Countries = new List<Country>();
private static void Main()
{
var city1 = new City {Name = "Auckland"};
var city2 = new City { Name = "Wellington" };
var city3 = new City { Name = "Perth" };
var city4 = new City { Name = "Sydney" };
var city5 = new City { Name = "Beijing" };
var country1 = new Country {Name = "NZ", Cities = new List<City> {city1, city2}};
var country2 = new Country { Name = "AU", Cities = new List<City> { city3, city4 } };
var country3 = new Country { Name = "CN", Cities = new List<City> { city5 } };
Countries.Add(country1);
Countries.Add(country2);
Countries.Add(country3);
List<String> cityNames = new List<string>{"Auckland", "Beijing"};
var countries = GetListOfCountires(cityNames); // this should return NZ, and CN
}
public class Country
{
public string Name;
public List<City> Cities = new List<City>();
}
public class City
{
public string Name;
}
public static List<Country> GetListOfCountires(List<String> cityNames)
{
List<Country> result = new List<Country>();
foreach (var cityName in cityNames)
{
result.Add(Countries.Where(x=>x.Cities.Contains(cityName))); // error???
}
return result;
}
Dank