如何使用linq按主键组合三个对象列表

我正在尝试组合3个对象列表。 我有一个人名单，地址列表和地址关联列表。 我想将这些列表组合到person.id排序的新列表中，将其用作列表视图的数据源，然后能够访问aspx页面中的属性。

这可能吗？

Answer 1

大致

using System.Linq; class Person { public int Id; public string Name; } class Address { public int Id; public string Street; } class PersonAddress { public int PersonId, AddressId; } public class Program { public static void Main(string[] args) { var personList = new [] { new Person { Id = 1, Name = "Pete" }, new Person { Id = 2, Name = "Mary" }, new Person { Id = 3, Name = "Joe" } }; var addressList = new [] { new Address { Id = 100, Street = "Home Lane" }, new Address { Id = 101, Street = "Church Way" }, new Address { Id = 102, Street = "Sandy Blvd" } }; var relations = new [] { new PersonAddress { PersonId = 1, AddressId = 101 }, new PersonAddress { PersonId = 3, AddressId = 101 }, new PersonAddress { PersonId = 2, AddressId = 102 }, new PersonAddress { PersonId = 2, AddressId = 100 } }; var joined = from par in relations join p in personList on par.PersonId equals p.Id join a in addressList on par.AddressId equals a.Id select new { Person = p, Address = a }; foreach (var record in joined) System.Console.WriteLine("{0} lives on {1}", record.Person.Name, record.Address.Street); } } 

输出：

 Pete lives on Church Way Mary lives on Sandy Blvd Mary lives on Home Lane Joe lives on Church Way