C#中两个异构列表的交集

Question

我想得到两个列表的交集:一个GameObject的列表和一个Realproperty的列表，并在一个新的列表中得到这个结果，这个列表的类型是List< Lot >。Lot是GameObject的成员

class GameObject
{
    public string m_lotName;
    public Lot m_lot;
    //other members
}

class Lot
{
    public string m_lotName;
    //other members
}

class RealProperty
{
    public string m_name;
    //other members
}

List<GameObject> allLots = getAllLots();
List<RealProperty> soldRealProperties = getSoldRealProperties();

我想得到一个List< Lot >这将是以下结果的结果: List< GameObject >被List< RealProperty过滤>对于List< gameobject的每个游戏对象>我们测试gameobject.m_lot.m_lotName是否存在于List< RealProperty >元素中。

似乎LINQ让它成为可能

我试过这样的方法：

List<Lot> soldLots = allLots
            .Select(a => a.GetComponent<Lot>().m_lotName)
            .Where(u => allLots
                       .Select(l => l.m_lot.m_lotName)
                       .Intersect(soldRealProperties
                           .Select(l2 => l2.m_name))
                           );

但我犯了很多错误，比如：

Type `string' does not contain a definition for `m_name' and no extension method `m_name' of type `string' could be found (are you missing a using directive or an assembly reference?)
Type `System.Collections.Generic.IEnumerable<string>' does not contain a member `Contains' and the best extension method overload `System.Linq.Queryable.Contains<object>(this System.Linq.IQueryable<object>, object)' has some invalid arguments
Extension method instance type `System.Collections.Generic.IEnumerable<string>' cannot be converted to `System.Linq.IQueryable<object>'

有一种简单的方法可以得到两个异构列表的交集吗？

Answer 1

您可以使用Enumerable.Join

var intersecting = from game in allLots
                   join realProp in soldRealProperties
                   on game.m_lotName equals realProp.m_name
                   select game.m_lot;
List<Lot> soldLots = intersecting.ToList();