C # List ordering various usages and comparisons _c# tutorials

The following describes the use and comparison of the sort of the list

First, we build a people entity that has the attributes of name, age, and sex, and the fields we want to sort on are ages

Create a new entity class

 public class people
  {public
    string name {get; set;}
    public int Age {get; set;}
    public string Sex {get; set;}
  }

Create a new list of data

  list<people> peoples = new List<people> ()
      {
        New people () {age = one, name= "alun", sex = "male"},
        new People () {age=25, name = "Chen Jingtao", sex = "man"},
        New people () {age=9, name = "Huian", sex = "man"},
        New people () {age = 45 , name = "Small Ticket", sex = "female"},
        New people () {age=3, name = "Xiao ou", sex = "female"},
        New people () {age=70, name = "Wangmo", sex = "Male"}
      };

1. The 1th sort of method, using IComparer

 public class peopleagecomparer:icomparer<people>
  {public
    int Compare (People p1, people p2)
    {
      Return P1.age.CompareTo (p2.age);
    }

Peoples. Sort (New Peopleagecomparer ());

You can see the first method of parity trouble, to create a new class to do

2. The 2nd sort of method, using the delegate to sort

Peoples. Sort (Delegate (People P1, people p2) {return p1.age.CompareTo (p2.age);});

It's convenient to look at the delegates, without the hassle of creating new classes.

3. The 2nd sort of method, using lambda expressions to sort

Peoples. Sort ((A, B) => A.age.compareto (b.age));

There are 3 methods for visual sorting, and it is easy for individuals to think of lambda expressions.

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