LinqStudy/LinqStudy.Test/Other/IndexersTest.cs

using System;
using System.Collections.Generic;
using System.Text;

using Xunit;

namespace LinqStudy.Test.Other
{
    /// <summary>
    /// 索引器测试
    /// </summary>
    public class IndexersTest
    {
        [Fact]
        public void Test()
        {
            PersonIndexers indexer = new PersonIndexers( PersonManager.GetPersons());

            Assert.Equal(1, indexer[0].Id);
        }
    }

    public class PersonIndexers
    {
        private List<Person> Persons=new List<Person>();

        public PersonIndexers(List<Person> people)
        {
            Persons = people;
        }

        public Person this[int index]
        {
            get
            {
                if (index >= 0 && index < Persons.Count)
                {
                    return Persons[index];
                }
                else
                {
                    return null;
                }
            }
            set {
                if (index >= 0 && index < Persons.Count)
                {
                    Persons[index] = value;
                }
                else
                {
                     throw new IndexOutOfRangeException();
                }
            }
        }
    }

    public class EmployeeIndexers 
    {
        private List<Employee> Employees;

        public EmployeeIndexers(List<Employee> _employees)
        {
            Employees = _employees;
        }

        public Employee this[string name]
        {
            get
            {
                return Employees.Find(q => q.Name== name);
            }
            set
            {
                var idx= Employees.FindIndex(q => q.Id == value.Id);
                Employees[idx] = value;
            }
        }
        
    }
}