linq string.contains on 子对象列表的字段

Question

如何更改此处的 linq 语句，以便找到包含子字符串为“third”的用户的公司？

目前它仅在搜索完整用户名时有效，即 contains("third user") 因为它正在搜索列表中的匹配项，而不是字符串。

class Company
{
    public Company(List<User> users) { this.Users = users; }
    public List<User> Users { get; set; }
}

class User
{
    public User(string name) { this.Name = name; }
    public string Name { get; set; }
}

class Program
{
    static void Main(string[] args)
    {
        List<Company> companies = new List<Company>();
        Company company1 = new Company(new List<User>(){ new User("first user"), new User("second user") });
        Company company2 = new Company(new List<User>() { new User("third user"), new User("fourth user") });
        companies.Add(company1);
        companies.Add(company2);

        companies = companies
                            .Where(company => company.Users.Select(user => user.Name)
                            .Contains("third")).ToList();
    }
}

Answer 1

您应该在user.Name 上致电string.Contains：

companies = companies
    .Where(company => company.Users.Any(user => user.Name.Contains("third")))
    .ToList();

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