program.cs

GOF23种设计模式详细例子!附有详细的代码噢!

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

namespace StrategyExample
{
    class Program
    {
        static void Main(string[] args)
        {
            Data data = new Data();
            data.Add("aaa");
            data.Add("bbb");
            data.Add("ccc");
            data.Add("abc");
            data.Show();
            data.SetShowDataStrategy(new SearchData("a"));
            data.Show();
            data.SetShowDataStrategy(new ShowPagedData(2,1));
            data.Show();
        }
    }

    abstract class ShowDataStrategy
    {
        abstract public void ShowData(IList data);
    }

    class ShowAllData : ShowDataStrategy
    {
        public override void ShowData(IList data)
        {
            for (int i = 0; i < data.Count; i++)
            {
                Console.WriteLine(data[i]);
            }
        }
    }

    class ShowPagedData : ShowDataStrategy
    {
        private int pageSize;
        private int pageIndex;

        public ShowPagedData(int pageSize, int pageIndex)
        {
            this.pageSize = pageSize;
            this.pageIndex = pageIndex;
        }

        public override void ShowData(IList data)
        {
            for (int i = pageSize * pageIndex; i < pageSize *  (pageIndex + 1); i++)
            {
                Console.WriteLine(data[i]);
            }
        }
    }

    class SearchData : ShowDataStrategy
    {
        private string searchWord;

        public string SearchWord
        {
            get { return searchWord; }
            set { searchWord = value; }
        }

        public SearchData(string searchWord)
        {
            this.searchWord = searchWord;
        }

        public override void ShowData(IList data)
        {
            for (int i = 0; i < data.Count; i++)
            {
                if (data[i].ToString().Contains(searchWord))
                    Console.WriteLine(data[i]);
            }
        }
    }
    
    class Data
    {
        private ShowDataStrategy strategy;
        private IList data = new ArrayList();

        public void SetShowDataStrategy(ShowDataStrategy strategy)
        {
            this.strategy = strategy;
        }

        public void Show()
        {
            if (strategy == null)
                strategy = new ShowAllData();
            Console.WriteLine(strategy.GetType().ToString());
            strategy.ShowData(data);
        }

        public void Add(string name)
        {
            data.Add(name);
        }
    }
}