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【C#】自作クラスのListのソート

Last updated at Posted at 2018-03-27

自作クラスのListをSortさせる処理のメモ

public class Person
{
  // 名前
  public string Name { get; set; }
  // 年齢
  public int Age { get; set; }
}

public class Main
{
  List<Person> people = new List<Person>()
  {
    new Person(){ Name = "a", Age = 10 },
    new Person(){ Name = "b", Age = 11 },
    new Person(){ Name = "c", Age = 12 }
  };

  public Main()
  {
    // 年齢昇順
    people.Sort((a, b) => a.Age - b.Age);
    // 年齢降順
    people.Sort((a, b) => b.Age - a.Age);
    // 名前昇順
    people.Sort((a, b) => string.Compare(a.Name, b.Name));
  }
}

まとめ

a - b で昇順
b - a で降順

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