Csharp 使用其可能实现的基类和接口的属性的方法

我想到了一些可能性.

选项1:使用扩展方法

public abstract class Spell
{
    public abstract void DoStuff();
}

public static class ProjectileExtensions
{
    public static void DoProjectileMovement<TSpell>(this TSpell projectile)
        where TSpell : Spell, Projectile
    {
        // Handle moving spell
        // (You can access members of Spell and Projectile here)
    }
}

public class Fireball : Spell, Projectile
{
    public int projNum { get; set; }
    public float projSpeed { get; set; }

    public override void DoStuff()
    {
        this.DoProjectileMovement(); // 'this' qualifier is required
    }
}

您甚至可以编写需要实现接口组合的扩展方法.

public static class ProjectileExtensions
{
    public static void DoExplodingProjectileMovement<TSpell>(this TSpell projectile)
        where TSpell : Spell, Exploding, Projectile
    {
        // Handle explosive moving spell
        // (You can access members of Spell, Exploding, and Projectile here)
    }
}

选项2:使用默认接口实现(仅限.NET Core)

此选项要求您引入由Spell和Outlittile实现的ISpell界面.

public interface ISpell
{
    void DoStuff();
}

public abstract class Spell : ISpell
{
    public abstract void DoStuff();
}

public interface Projectile : ISpell
{
    int projNum { get; set; }
    float projSpeed { get; set; }

    void DoProjectileMovement()
    {
        // Handle moving spell
        // (You can access members of ISpell and Projectile here)
    }
}

public class Fireball : Spell, Projectile
{
    public int projNum { get; set; }
    public float projSpeed { get; set; }

    public override void DoStuff()
    {
        ((Projectile)this).DoProjectileMovement(); // cast is required
    }
}

选项3:重构以使用组合而不是继承

将投影仪从接口更改为类.

public class Projectile
{
    private Spell Spell { get; }

    public Projectile(Spell spell)
    {
        Spell = spell;
    }

    public int projNum { get; set; }
    public float projSpeed { get; set; }

    public void DoProjectileMovement()
    {
        // Handle moving spell
        // (You can access members of Spell (via the Spell property) and Projectile here)
    }
}

public class Fireball : Spell
{
    private Projectile Projectile { get; }

    public Fireball()
    {
        Projectile = new Projectile(this);
    }

    public int projNum { get; set; }
    public float projSpeed { get; set; }

    public override void DoStuff()
    {
        Projectile.DoProjectileMovement();
    }
}