C# - MyClass.MyProperty[东西]

Question

我想做某事，但不确定如何描述它。我有这门课

public class Company {
  private List<Person> _persons;
  private Person GetPersonByName(string name) {
    // My code to select Person is here, which is fine
  }
}

但我希望能够做到这一点

Company c;
Person p = c.Persons["John"];

应该隐式调用 GetPersonByName("John")。

这可能吗？我需要向 Company 类添加什么？

提前致谢!

Answer 1

是的，这是可能的。您需要创建一个访问器类，如下所示:

public class Company
{
    private List<Person> _persons;
    public class PersonsIndexer
    {
        Company _owner;
        public PersonsIndexer(Company owner)
        {
            _owner = owner;
        }
        public Person this[string name]
        { 
            get
            {
                 return _owner._persons.FirstOrDefault(x=>x.Name == name); // or whatever code you have there
            }
        }
    }

    public PersonsIndexer Persons{ get; private set; }

    public Company() 
    {
        Persons = new PersonsIndexer(this);
    }

}