I have a nested list, something like this:
List<Hotel> Hotels;
public class Hotel
{
List<RoomType> RoomType;
}
public class RoomType
{
Room Room;
}
public class Room
{
int RoomId;
}
It's a little convoluted, sorry couldn't think of a better mockup model. The Idea is that I have many hotels, each hotels has many room types, and assume each room type has exactly one room object.
Now from Hotels list, I just want to select all RoomId
's.. I am stuck here, while trying to nest all list..
right now, I am trying this:
//cant do this some invalid error
int[] AllRoomIds = Hotels.selectMany(x => x.Rooms)
.selectMany(y => y.RoomType.Room.Id).Distinct().ToArray()
//cant do this - z doesnt have anything
int[] AllRoomIds = Hotels.selectMany(x => x.Rooms)
.selectMany(y => y.RoomType)
.select(z => z.
How do I do this please?
Accessing all id's of all items in a nested list.. occasionally it complains of cannot convert int to boolean
and I do not know what it means...
Thanks.. hope the question was understanble
While the hierarchy you posted above really doesn't make much sense to me (seems RoomType and Room are backwards), I'll post an example to go with it:
Hotels.SelectMany(h => h.RoomType)
.Select(rt => rt.Room.Id)
.Distinct()
.ToArray();