C# Nested classes

Question

I am trying to create a few nested classes within my main class.

public class MyPlayer : Player
{

    public bool TargetEnemy()
    {
        return true;

    }

    public class Movement
    {
        public uint aInt = 1;

        public TurnLeft()
        {

        }
    }

    public class ActionBar
    {

    }
}

I have many different classes so that I would be able to access the MyPlayer class through out the code without passing it to all them I just created a static class that holds the variable for it. I am able to access the MyPlayer->Movement using Main.Units.MyPlayer.Movement but this is not linked to the MyPlayer instance I have defined in the static class.

I want to be able to do MyPlayer->Movement->TurnLeft() for example. How would I achieve this? Thanks for your answers.

multiple-inheritance is a totally different thing (and doesn't exist in.Net) I removed that tag. — gdoron
– gdoron, Commented May 20, 2012 at 18:31

Douglas · Accepted Answer · 2012-05-20 18:32:32Z

2

You might be mistaking the concept of class nesting with class composition. In order to have a Movement instance within your Player class, you can define a private field movement and a public property Movement to access it.

public class Player
{        
    public bool TargetEnemy()
    {
        return true;            
    }

    private Movement movement = new Movement();

    public Movement Movement
    {
        get { return movement; }
        set { movement = value; }
    }
}

public class Movement
{
    public uint aInt = 1;

    public TurnLeft()
    {

    }
}

public class ActionBar
{

}

Then, you may create an instance of your Player class and access its contained Movement:

Player myPlayer = new Player();
myPlayer.Movement.TurnLeft();

answered May 20, 2012 at 18:32

Douglas

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2 Comments

CodesInChaos Over a year ago

Since the Movement class seems to be mutable, I would remove the setter of the Movement property.

Douglas Over a year ago

@CodeInChaos: Good point, but I can’t infer enough from the class design to determine whether it should be mutable. My suspicion is that it shouldn’t, and that TurnLeft should actually be replaced by some polymorphic Move method (to be overridden by derived classes for specific kinds of movements).

gdoron · Accepted Answer · 2012-05-20 18:29:40Z

0

Then MyPlayer should have a reference to a Movement instance.

public class MyPlayer : Player
{
    public static Movement movement = new Movement();
    ...
}

answered May 20, 2012 at 18:29

gdoron

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