如何使用父接口固有的相同方法实现多个接口

Question

考虑以下接口:

public interface IComponent    {    }

public interface ISwitch : IComponent
{
    bool IsOn    { get; }
    event EventHandler SwitchedOff;
    event EventHandler SwitchedOn;
}

public interface ISwitchable : ISwitch, IComponent
{
    void SwitchOff();
    void SwitchOn();
}

public interface IPowerSwitch : ISwitchable, ISwitch, IComponent   {    }

public interface IHeatingElement : ISwitchable, ISwitch, IComponent   {    }

我在类这样的类中实现了IPowerSwitch:

public class Kettle : IPowerSwitch
{
    event EventHandler PowerOnEvent;
    event EventHandler PowerOffEvent;

    object objectLock = new Object();

    public bool IsPowerOn;

    public Kettle()
    {
            IPowerSwitch p = (IPowerSwitch)this;
            p.SwitchedOn += new EventHandler(On_PowerOn_Press);
            p.SwitchedOff += new EventHandler(On_PowerOff_Press);
    }


    void ISwitchable.SwitchOff()
    {
        EventHandler handler = PowerOffEvent;
        if (handler != null)
        {
           handler(this, new EventArgs());
        }          
    }

    void ISwitchable.SwitchOn()
    {
        EventHandler handler = PowerOnEvent;
        if (handler != null)
        {
            handler(this, new EventArgs());
        }
    }

    bool ISwitch.IsOn
    {
        get { return IsPowerOn ; }
    }

    event EventHandler ISwitch.SwitchedOff
    {
        add
        {
            lock (objectLock)
            {
                PowerOffEvent += value;
            }
        }
        remove 
        {
            lock (objectLock)
            {
                PowerOffEvent -= value;
            }
        }
    }

    event EventHandler ISwitch.SwitchedOn
    {
        add
        {
            lock (objectLock)
            {
                PowerOnEvent += value;                    
            }
        }
        remove
        {
            lock (objectLock)
            {
                PowerOnEvent -= value;                   
            }
        }
    }

    protected void On_PowerOn_Press(object sender, EventArgs e)
    {
        if (!((IPowerSwitch)sender).IsOn)
        {
            Console.WriteLine("Power Is ON");
            ((Kettle)sender).IsPowerOn = true;
            ((IPowerLamp)this).SwitchOn();
        }
        else
        {
            Console.WriteLine("Already ON");

        }

    }

    protected void On_PowerOff_Press(object sender, EventArgs e)
    {
        if (((IPowerSwitch)sender).IsOn)
        {
            Console.WriteLine("Power Is OFF");
            ((Kettle)sender).IsPowerOn = false;
            ((IPowerLamp)this).SwitchOff();
        }
        else
        {
            Console.WriteLine("Already OFF");
        }

    }

}

现在我想在这个类中实现IHeatingElement接口.IHeatingElement与IPowerSwitch具有相同的方法.那么我如何实现IHeatingElement的SwitchOn和SwitchOff.如果我尝试实现类似IPowerSwitch.SwitchOff()的东西,我会收到错误

显式接口声明中的"IPowerSwitch.SwitchOff"不是接口的成员.

我想要做的是,当电源开关事件被提升时,应该在此之后引发加热开启事件.当加热关闭时,应该提高电源开关关闭事件.

这是我的第一个问题,如果问题出现问题,请指导我.感谢您的帮助.

Answer 1

正如@ Peter-ritchie在评论中所说,"并非所有事情都需要通过继承来实现".在您当前的代码中,您试图说a Kettle 是一种电源开关和加热元件.我想你想说的是,Kettle 有两个电源开关和加热元件.这称为组合.

相反,你要构造Kettle像这样的对象:

public class Kettle : ISwitchable
{
     private IPowerSwitch Power;
     private IHeatingElement Heat;

     public Kettle()
     {
        Power = new PowerSwitch();
        Heat = new HeatingElement();
     }

     public void SwitchOn()
     {
         Power.SwitchOn();
         Heat.SwitchOn();
     }

     // And so on.
}
public class PowerSwitch : IPowerSwitch {}
public class HeatingElement : IHeatingElement {}