我如何实现这种类型的OOP结构？

I want to build a nice API (C#) to make it easier for people to consume, I think I've seen this before and want to know how to do this:

我想建立一个很好的API(C#),让人们更容易消费,我想我以前见过这个并想知道如何做到这一点:

MyNamespace.Cars car = null;

if(someTestCondition)
       car = new Honda();
else    
       car = new Toyota();

car.Drive(40);

Is this possible? If so, what needs to be done?

这可能吗?如果是这样,需要做什么?

7 个解决方案

#1

Interface Car
{
void Drive(int miles);
}

class Honda : Car
{
...
}
class Toyota : Car
{
...
}

#2

You could do this a couple of different ways. You could declare an abstract base class or you could have an interface that your object implement. I believe the "C#" preferred method would be to have an interface. Something like:

你可以用几种不同的方式做到这一点。您可以声明一个抽象基类,也可以使用对象实现的接口。我相信“C#”首选方法是拥有一个接口。就像是:

public interface ICar
{
    public Color Color { get; set; }

    void Drive(int speed);
    void Stop();

}

public class Honda : ICar
{

    #region ICar Members

    public Color Color { get; set; }

    public void Drive(int speed)
    {
        throw new NotImplementedException();
    }

    public void Stop()
    {
        throw new NotImplementedException();
    }

    #endregion
}

public class Toyota : ICar
{
    #region ICar Members

    public Color Color { get; set; }

    public void Drive(int speed)
    {
        throw new NotImplementedException();
    }

    public void Stop()
    {
        throw new NotImplementedException();
    }

    #endregion
}

#3

I see everyone is pushing interface / abstract base class changes to you. The pseudocode you provided more or less implies you already have this in place.

我看到每个人都在推动界面/抽象基类更改。您提供的伪代码或多或少暗示您已经有了这个。

I'll pose something else:

我会做出别的东西:

You'll want to create a "CarFactory" that will return a specific implementation of your base class / interface. The Create method can take your test conditions as parameters so you create the correct car.

您将需要创建一个“CarFactory”,它将返回基类/接口的特定实现。 Create方法可以将您的测试条件作为参数,以便您创建正确的汽车。

EDIT: Here's a link from MSDN -- http://msdn.microsoft.com/en-us/library/ms954600.aspx

编辑:这是MSDN的链接 - http://msdn.microsoft.com/en-us/library/ms954600.aspx

EDIT: See the comments for another link.

编辑:请参阅其他链接的评论。

#4

Make a class named Cars. Give it the Drive method. Extend that base class in your Honda and Toyota classes.

创建一个名为Cars的课程。给它Drive方法。扩展本田和丰田课程中的基础课程。

#5

namespace MyNameSpace
{
  public interface Cars
  {
    public void Drive(int miles);
  }
  public class Honda : Cars
  {
    public void Drive(int miles) { ... }
  }
  public class Toyota : Cars
  {
    public void Drive(int miles) { ... }
  }
}

#6

Don't forget the namespace, also see my comment in the question about variable names

不要忘记命名空间,也请看关于变量名称的问题中的评论

namespace MyNamespace {
    public interface Cars {
        void Drive(int speed);
    }

    public class Honda : Cars {
        public void Drive(int speed) { 
        }
    }
    public class Toyota : Cars {
        public void Drive(int speed) {

        }
    }
}

#7

Make an abstract class called Cars with an abstract method called Drive(). Subclass it and add implementations.

使用名为Drive()的抽象方法创建一个名为Cars的抽象类。对它进行子类化并添加实现。

#1

Interface Car
{
void Drive(int miles);
}

class Honda : Car
{
...
}
class Toyota : Car
{
...
}

#2