请教一下！代码冗余，觉得应该用泛型或接口解决，但不知道具体怎么办好

[lqh3417]

Method1()，Method2()，Method3()唯一不同的是生成类的类名，算法都一样。我想把它们变为Method<T>(){...}调用时Method<Class1>()，Method<Class2>()，Method<Class3>()但是没办法调用T的方法out()和实例化它。我想请问一下应该如何优化这段代码？

using System;
using System.Collections.Generic;
using System.Text;

namespace ConsoleApplication1
{
    class Class0
    {
        static void Main()
        {
            Class0 c1 = new Class0();
            string s=Console.ReadLine();
            while (s!= "0")
            {
                switch(s)
                {
                    case "1": c1.Method1(); break;
                    case "2": c1.Method2(); break;
                    case "3": c1.Method3(); break;
                    default: break;
                }
                s = Console.ReadLine();
            }

        }
        public void Method1()
        {
            for (int i = 1; i < 5; i++)
            {
                Class1 cc = new Class1(i, 2*i,3*i);
                cc.Out();
            }
        }

        public void Method2()
        {
            for (int i = 1; i < 5; i++)
            {
                Class2 cc = new Class2(i, 2 * i, 3 * i);
                cc.Out();
            }
        }

        public void Method3()
        {
            for (int i = 1; i < 5; i++)
            {
                Class3 cc = new Class3(i, 2 * i, 3 * i);
                cc.Out();
            }
        }

    }       
    public class Class1
    {
        int a, b, c;
        public Class1(int a,int b,int c)
        {
            this.a = a;
            this.b = b;
            this.c = c;
        }
    
        public void Out()
        {
            Console.WriteLine("class1:I got {0},{1},{2}", a, b, c);
            Console.WriteLine("class1:1st one is {0}" , a);
        }
    }
    public class Class2
    {
        int a, b, c;

        public Class2(int a,int b,int c)
        {
            this.a = a;
            this.b = b;
            this.c = c;
        }
    
        public void Out()
        {
            Console.WriteLine("class2:I got {0},{1},{2}", a, b, c);
            Console.WriteLine("class2:2nd one is {0}",b);
        }
    }
    public class Class3
    {
        int a, b, c;
        public Class3(int a,int b,int c)
        {
            this.a = a;
            this.b = b;
            this.c = c;
        }
    
        public void Out()
        {
            Console.WriteLine("class3:I got {0},{1},{2}",a,b,c);
            Console.WriteLine("class3:3rd one is {0}" , c);
        }
    }
} 

[wuyq11]

public void Method1<T>(T t)
{
判断类型Type t = typeof(T);

}

[lqh3417]

啊！！！这样也行？？？？不过您的意思我还不太明白，是T.GetType吗？

[人到中年琐事多]

弄一个基类：
public class Test
{
int a, b, c;

public Test(int a,int b,int c)
{
this.a = a;
this.b = b;
this.c = c;
}

public virtual void Out()
{

}
}

在派生出三个类，只要重写Out方法即可

Main方法中：
Test t;
switch(s)
{
case "1": t=new Class1(); break;
case "2": t=new Class2(); break;
case "3": t=new Class3(); break;
default: break;
}
if(t!=null)
t.Out();

[lqh3417]

说到派生，我想用接口也行吧？如果可以，应该怎么用呢？
还有用泛型行吗？好像这种特性很少被用到呃，是不是不适合于解决这个问题啊？

[lqh3417]

代码最好编译通过再贴出来啊，比如yangglemu的代码错误就是t使用了未赋值的变量，还有Class1，Class2，Class3构造函数要有参数的，要通过算法循环代入参数并调用其out方法

而且请wuyq11讲明白一些吧，要代码说明而不只是文字描述

[兔子-顾问]

可以定义接口。然后这样写

using System;
using System.Collections.Generic;
using System.Text;

namespace ConsoleApplication1
{
    public interface IOut
    {
        void Init(int a, int b, int c);
        void Out();
    }
    class Class0
    {
        static void Main()
        {
            Class0 c1 = new Class0();
            string s = Console.ReadLine();
            while (s != "0")
            {
                switch (s)
                {
                    case "1": c1.Method1(); break;
                    case "2": c1.Method2(); break;
                    case "3": c1.Method3(); break;
                    default: break;
                }
                s = Console.ReadLine();
            }

        }

        public void Method<T>() where T : IOut, new()
        {
            for (int i = 1; i < 5; i++)
            {
                T cc = new T();
                cc.Init(i, 2 * i, 3 * i);
                cc.Out();
            }
        }

        public void Method1()
        {
            for (int i = 1; i < 5; i++)
            {
                Class1 cc = new Class1(i, 2 * i, 3 * i);
                cc.Out();
            }
        }

        public void Method2()
        {
            for (int i = 1; i < 5; i++)
            {
                Class2 cc = new Class2(i, 2 * i, 3 * i);
                cc.Out();
            }
        }

        public void Method3()
        {
            for (int i = 1; i < 5; i++)
            {
                Class3 cc = new Class3(i, 2 * i, 3 * i);
                cc.Out();
            }
        }

    }
    public class Class1 : IOut
    {
        int a, b, c;
        public Class1() { }
        public Class1(int a, int b, int c)
        {
            this.a = a;
            this.b = b;
            this.c = c;
        }


        public void Init(int a, int b, int c)
        {
            this.a = a;
            this.b = b;
            this.c = c;
        }

        public void Out()
        {
            Console.WriteLine("class1:I got {0},{1},{2}", a, b, c);
            Console.WriteLine("class1:1st one is {0}", a);
        }
    }
    public class Class2 : IOut
    {
        int a, b, c;
        public Class2() { }
        public Class2(int a, int b, int c)
        {
            this.a = a;
            this.b = b;
            this.c = c;
        }

        public void Init(int a, int b, int c)
        {
            this.a = a;
            this.b = b;
            this.c = c;
        }

        public void Out()
        {
            Console.WriteLine("class2:I got {0},{1},{2}", a, b, c);
            Console.WriteLine("class2:2nd one is {0}", b);
        }
    }
    public class Class3 : IOut
    {
        int a, b, c;
        public Class3() { }
        public Class3(int a, int b, int c)
        {
            this.a = a;
            this.b = b;
            this.c = c;
        }

        public void Init(int a, int b, int c)
        {
            this.a = a;
            this.b = b;
            this.c = c;
        }

        public void Out()
        {
            Console.WriteLine("class3:I got {0},{1},{2}", a, b, c);
            Console.WriteLine("class3:3rd one is {0}", c);
        }
    }
}

[兔子-顾问]

如果用继承+反射

using System;
using System.Collections.Generic;
using System.Text;

namespace ConsoleApplication1
{
    class Class0
    {
        static void Main()
        {
            Class0 c1 = new Class0();
            string s = Console.ReadLine();
            while (s != "0")
            {
                switch (s)
                {
                    case "1": c1.Method<Class1>(); break;
                    case "2": c1.Method<Class2>(); break;
                    case "3": c1.Method<Class3>(); break;
                    default: break;
                }
                s = Console.ReadLine();
            }

        }

        public void Method<T>() where T : ClassBase
        {
            for (int i = 1; i < 5; i++)
            {
                T cc = (T)Activator.CreateInstance(typeof(T), i, 2 * i, 3 * i);
                cc.Out();
            }
        }
    }
    public abstract class ClassBase
    {
        public int a, b, c;
        public ClassBase(int a, int b, int c)
        {
            this.a = a;
            this.b = b;
            this.c = c;
        }
        public abstract void Out();
    }

    public class Class1 : ClassBase
    {
        public Class1(int a, int b, int c)
            : base(a, b, c)
        {
        }
        public override void Out()
        {
            Console.WriteLine("class1:I got {0},{1},{2}", a, b, c);
            Console.WriteLine("class1:1st one is {0}", a);
        }
    }
    public class Class2 : ClassBase
    {
        public Class2(int a, int b, int c)
            : base(a, b, c)
        {
        }
        public override void Out()
        {
            Console.WriteLine("class2:I got {0},{1},{2}", a, b, c);
            Console.WriteLine("class2:1st one is {0}", a);
        }
    }
    public class Class3 : ClassBase
    {
        public Class3(int a, int b, int c)
            : base(a, b, c)
        {
        }
        public override void Out()
        {
            Console.WriteLine("class3:I got {0},{1},{2}", a, b, c);
            Console.WriteLine("class3:1st one is {0}", a);
        }
    }
}

[skyering]

  public interface IOut
    {
        void Init(int a, int b, int c);
        void Out();
    }

 public void Method<T>() where T : IOut, new()
        {
            for (int i = 1; i < 5; i++)
            {
                T cc = new T();
                cc.Init(i, 2 * i, 3 * i);
                cc.Out();
            }
        }

就像六楼的代码所示，运用泛型约束技术。接口IOut实现泛型参数需要调用的接口。

[lqh3417]

在学校比较早睡，不好意思，看来大家都比较晚的哦呵呵。
嗯嗯，后来的方法都很不错很具体，开始学习了！实在不懂再指教一下吧~~