C#学习.工厂设计模式实例

1.创建一个笔记本电脑父类

    public abstract class NoteBook
    {
        public abstract void SayHello();
    }

2.创建几个不同品牌的笔记本电脑子类

    public class Lenovo:NoteBook
    {
        public override void SayHello()
        {
            Console.WriteLine(\”我是联想笔记本\”);
        }
    }

    public class Dell:NoteBook
    {
        public override void SayHello()
        {
            Console.WriteLine(\”我是戴尔笔记本\”);
        }
    }

    public class IBM:NoteBook
    {
        public override void SayHello()
        {
            Console.WriteLine(\”我是IBM笔记本\”);
        }
    }

3.接下来是关键的方法，根据传入不同的参数，返回父类的实例

        public static NoteBook GetNoteBook(string brand)
        {
            NoteBook nb =null;
            switch(brand)
            {
                case \”Lenovo\”:
                    nb = new Lenovo();
                    break;
                case \”Dell\”:
                    nb = new Dell();
                    break;
                case \”IBM\”:
                    nb = new IBM();
                    break;
            }
            return nb;
        }

4.通过输入进行调用

        static void Main(string[] args)
        {
            Console.WriteLine(\”请输入你需要选择的笔记本型号\”);
            string sNBType = Console.ReadLine();
            NoteBook nb = GetNoteBook(sNBType);
            nb.SayHello();
            Console.ReadLine();
        }