c# 如果两个属性相同，则将两个类合并到一个列表中

Question

I practice OOP and have this question. Let's say I have three classes:

public class Car  {
int id { get; set; }
string name { get; set; }
DateTime dateOfProduction { get; set; }
...
}

and

public class Customer {
int customerId { get; set; }
int carId { get; set; }
DateTime pickupDate { get; set; }
...
}

and

public class Fabric {
int id { get; set; }
int Fabricname { get; set; }
int CarId { get; set; }
int numberOfEmployees { get; set; }
string fabricLocation { get; set; }
... }

Now I want one List with the all other information from Fabric(Fabricname, numberOfEmpoyees) and all attributes of Customer (name, id, ...) if they have the same CarId

-->CarId 12:
CustomerId: 294
CustomerName: Mike
FabricLocation: Munich
NumberOfEmpoyees: 100
PickupDate: 24/04/2020

--> CarId 13:
...

How do I do that / what is the best way? In the end I want to display all data in a (html) table in blazor.

Would be very happy if someone could help me

Answer 1

you should use .GroupJoin in linq

var result = fabricsList.GroupJoin(customersList,f=>f.CarId,cu=>cu.CarId,(f,cu)=>new {FabricName = f.FabricName,pickUpDate= cu.pickUpDate})