C # Policy mode (strategy pattern) Example Tutorial

In this paper, a simple example to illustrate the implementation of the C # Strategy model, shared for everyone to reference. The implementation method is as follows:

In general, when there are multiple implementations of an action, you might consider using a policy mode when you need to choose a method to perform the action according to different circumstances.

Abstract the action into an interface, such as playing the ball into an interface. The code is as follows:

public interface iball{    void Play ();

It is possible to play football, basketball, volleyball, etc., to abstract these balls into a class to implement the interface. The following are the differences:

public class football:iball{public    void Play ()    {      Console.WriteLine ("I like Football");}    } public class basketball:iball{public    void Play ()    {      Console.WriteLine ("I like Basketball");}    } public class volleyball:iball{public    void Play ()    {      Console.WriteLine ("I like Volleyball");}    }

There is also a class that is dedicated to choosing which balls to use and to execute the interface method:

public class sportsman{    private IBall ball;    public void Sethobby (IBall myball)    {ball      = Myball;    }    public void Startplay ()    {ball      . Play ();    }}

The client needs to make a choice for the user to instantiate a specific class based on different choices:

Class program{    static void Main (string[] args)    {      IBall ball = null;      Sportsman man = new Sportsman ();      while (true)      {        Console.WriteLine ("Select the ball item you like (1= football, 2 = basketball, 3 = volleyball)");        string input = Console.ReadLine ();        switch (input)        {case          ' 1 ': ball            = new Football ();            break;          Case "2": Ball            = new Basketball ();            break;          Case "3": Ball            = new Volleyball ();            break;        }        Man. Sethobby (ball);        Man. Startplay ();}}}    

The results of the program run are as follows:

I hope this article is helpful to everyone's C # programming.

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C # Policy mode (strategy pattern) Example Tutorial

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C # Policy mode (strategy pattern) Example Tutorial