c# abstract virtual new 修饰的方法的调用

最新推荐文章于 2023-10-20 15:00:29 发布

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最新推荐文章于 2023-10-20 15:00:29 发布

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本文深入探讨了抽象工厂模式的实现，通过具体代码示例展示了如何使用C#创建抽象工厂类和其子类ShapeFactory。文章解释了override关键字的作用，以及它如何影响方法的调用流程。

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public abstract class AbstractFactory
    {
        public new string GetType()
        {
            return "AbstractFactory";
        }

        public virtual string GetName()
        {
            return "AbstractFactory";
        }

        public string GetId()
        {
            return "AbstractFactory";
        }

        public abstract Shape GetShape(string shape);
        public abstract Color GetColor(string color);
    }

public class ShapeFactory : AbstractFactory
    {
        public new string GetType()
        {
            return "ShapeFactory";
        }

        public override string GetName()
        {
            return "ShapeFactory";
        }

        public new string GetId()
        {
            return "ShapeFactory";
        }

        public override Shape GetShape(string shape)
        {
            if (shape == null)
            {
                return null;
            }
            if (shape.Equals("CIRCLE"))
            {
                return new Circle();
            }
            else if (shape.Equals("RECTANGLE"))
            {
                return new Rectangle();
            }
            else if (shape.Equals("SQUARE"))
            {
                return new Square();
            }
            return null;
        }

        public override Color GetColor(string color)
        {
            return null;
        }
    }

static void Main(string[] args)
        {
            AbstractFactory factory = FactoryProducer.GetFactory("SHAPE");
            string type = factory.GetType();
            string name = factory.GetName();
            string id = (factory as ShapeFactory).GetId();
            Console.WriteLine(type + " " + name + " " + id);
            Shape shape1 = factory.GetShape("RECTANGLE");
            shape1.draw();
            Console.ReadKey();
        }