简单工厂模式_C#_设计模式

基类：

public class Operation
    {
        private int _numberA = 0;
        private int _numberB = 0;
        public int numberA
        {
            get { return _numberA; }
            set { _numberA = value; }
        }
        public int numberB
        {
            get { return _numberB; }
            set { _numberB = value; }
        }
        public virtual int OperationResult()
        {
            int result = 0;
            return result;
        }
    }

实现了加法的子类：

 public class OperateAdd : Operation
    {
        public override int OperationResult()
        {
            int result = 0;
            result = numberA + numberB;
            return result;
        }
    }

实现了减法的子类：

public class OperareDuce : Operation
    {
        public override int OperationResult()
        {
            int result = 0;
            result = numberA - numberB;
            return result;
        }
    }

工厂类OperationFactory：

public class OperationFactory
    {
        public static Operation CreateOperation(string operate)
        {
            Operation ope = null;
            switch(operate)
            {
                case "+":ope=new OperateAdd() ; break;
                case "-": ope = new OperareDuce(); break;
            }
            return ope;
        }
    }

调用：

public static void Main()
        {
            Operation op = OperationFactory.CreateOperation("+");
            op.numberA = 1;
            op.numberB = 2;
            Console.WriteLine(op.OperationResult());
            Console.ReadKey();
        }

父类中拥有共同所需的相关操作，子类对其进行重载，实现各自所需的操作。最后通过工厂类OperationFactory调用相关的子类

刚开始学习设计模式，写的不好 轻点拍。

代码参考来自《大话设计模式》