CSharp第四课（7/18）

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大笨小子 2011-07-20 10:13:53 ©著作权

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1、集合：
(1)ArryList a=new ArryList();
    追加时可用add，改变数值时可用集合名加下标。
    Remove(1)只会移除一次。
    RemoveAt(1)移除下标为1的。
    .Count查询元素数。
    .Capacity查询容量。

class Program
    {
        static void Main(string[] args)
        {
            ArrayList Arr = new ArrayList();
            Arr.Add(1);
            Arr.Add(2);
            Arr.Add(3);
            Arr.Remove(1);
            foreach (object i in Arr)
            {
                Console.WriteLine(i);

            }
            Console.WriteLine(Arr.Count);
            Console.WriteLine(Arr.Capacity);
        }
    }
(2)List（泛型）
     List<string>list=new List<string>;
    指定类型不用像ArryList一样转换类型。
    建议用List不用ArryList。
（3）栈
    Stack stack=new Stack();
    添加参数：用Push
    如：stack.Push(1);
    移除：stack.Pop();取最后一个。
    stack.Peek();看最后一个，不移除。
    先进后出。
（4）队列
     Queue queue=new Queue();
     queue.Enqueue(1);添加
     queue.Peek();只看不取。
     queue.Dequeue();看了就拿。

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading;

namespace ConsoleApplication1
{

    class Goods
    {
        public int Number;
        public string Name;
        public double Price;
        public string Guige;
        public int GoodsType;
    }
    struct GoodsType
    {
        public int Number;
        public string TypeName;
    }

    class Program
    {
        static void LoadType(List<GoodsType> types)
        {
            GoodsType gt1 = new GoodsType();
            gt1.Number = 1;
            gt1.TypeName = "家电";
            types.Add(gt1);
            GoodsType gt2 = new GoodsType();
            gt2.Number = 2;
            gt2.TypeName = "日用品";
            types.Add(gt2);
            GoodsType gt3 = new GoodsType();
            gt3.Number = 3;
            gt3.TypeName = "办公用品";
            types.Add(gt3);
        }
        static void Main(string[] args)
        {

List<GoodsType> types = new List<GoodsType>();
LoadType(types);

List<Goods> goodses = new List<Goods>();

            while (true)
            {
                Console.Clear();
                Console.WriteLine("1、添加商品 2、修改商品 3、删除商品 4、查询商品");
                switch (Console.ReadLine())
                {
                    case "1":
                        AddGoods(goodses, types);
                        break;
                    case "2":
                        ModifyGoods(goodses, types);
                        break;
                    case "3":
                        DeleteGoods(goodses, types);
                        break;
                    case "4":
                        QueryGoods(goodses, types);
                        break;
                }
            }
        }

        private static void DeleteGoods(List<Goods> goodses, List<GoodsType> goodstype)
        {
            Console.WriteLine("请输入修改商品的名称：");
            string goodsname = Console.ReadLine();
            Console.WriteLine("{0,-8}{1,-18}{2,-8}{3,-18}{4,-12}", "编号", "名称", "价格", "规格", "类型");

            foreach (Goods goods in goodses)
            {
                if (goods.Name.Contains(goodsname))
                {
                    string typename = "";
                    foreach (GoodsType gt in goodstype)
                    {
                        if (gt.Number == goods.GoodsType)
                        {
                            typename = gt.TypeName;
                            break;
                        }
                    }
                    Console.WriteLine("{0,-10}{1,-" + (20 - (Encoding.Default.GetByteCount(goods.Name) - goods.Name.Length)).ToString() + "}{2,-10}{3,-" + (20 - (Encoding.Default.GetByteCount(goods.Guige) - goods.Guige.Length)).ToString() + "}{4,-" + (14 - (Encoding.Default.GetByteCount(typename) - typename.Length)).ToString() + "}", goods.Number, goods.Name, goods.Price, goods.Guige, typename);
                }
            }

Console.WriteLine("请选择商品编号：");
int goodsnumber = int.Parse(Console.ReadLine());

            foreach (Goods goods in goodses)
            {
                if (goods.Number == goodsnumber)
                {

                    goodses.Remove(goods);
                    break;
                }
            }
        }

        private static void ModifyGoods(List<Goods> goodses, List<GoodsType> goodstype)
        {
            Console.WriteLine("请输入修改商品的名称：");
            string goodsname = Console.ReadLine();
            Console.WriteLine("{0,-8}{1,-18}{2,-8}{3,-18}{4,-12}", "编号", "名称", "价格", "规格", "类型");

Console.WriteLine("请选择商品编号：");
int goodsnumber = int.Parse(Console.ReadLine());

            foreach (Goods goods in goodses)
            {
                if (goods.Number == goodsnumber)
                {
                    string typename = "";
                    foreach (GoodsType gt in goodstype)
                    {
                        if (gt.Number == goods.GoodsType)
                        {
                            typename = gt.TypeName;
                            break;
                        }
                    }
                    Console.WriteLine("{0,-10}{1,-" + (20 - (Encoding.Default.GetByteCount(goods.Name) - goods.Name.Length)).ToString() + "}{2,-10}{3,-" + (20 - (Encoding.Default.GetByteCount(goods.Guige) - goods.Guige.Length)).ToString() + "}{4,-" + (14 - (Encoding.Default.GetByteCount(typename) - typename.Length)).ToString() + "}", goods.Number, goods.Name, goods.Price, goods.Guige, typename);

                    Console.WriteLine("请选修改项：");
                    bool mark = false;
                    while (true)
                    {
                        Console.WriteLine("1、{0} 2、{1} 3、{2} 4、{3} 5、{4}", "名称", "价格", "规格", "类型", "退出");
                        switch (Console.ReadLine())
                        {
                            case "1":
                                Console.WriteLine("请输入新名称：");
                                goods.Name = Console.ReadLine();
                                break;
                            case "2":
                                Console.WriteLine("请输入新价格：");
                                goods.Price = double.Parse(Console.ReadLine());
                                break;
                            case "3":
                                Console.WriteLine("请输入新规格：");
                                goods.Guige = Console.ReadLine();
                                break;
                            case "4":
                                Console.WriteLine("请输入选择新类型：");
                                foreach (GoodsType gt in goodstype)
                                {
                                    Console.WriteLine("{0}、{1}", gt.Number, gt.TypeName);
                                }
                                goods.GoodsType = int.Parse(Console.ReadLine());
                                break;
                            case "5":
                                mark = true;
                                break;
                        }

                        if (mark)
                        {
                            break;
                        }
                    }

}
}

}

        private static void QueryGoods(List<Goods> goodses, List<GoodsType> goodstype)
        {
            Console.WriteLine("{0,-8}{1,-18}{2,-8}{3,-18}{4,-12}", "编号", "名称", "价格", "规格", "类型");
            foreach (Goods goods in goodses)
            {
                string typename = "";
                foreach (GoodsType gt in goodstype)
                {
                    if (gt.Number == goods.GoodsType)
                    {
                        typename = gt.TypeName;
                        break;
                    }
                }
                Console.WriteLine("{0,-10}{1,-" + (20 - (Encoding.Default.GetByteCount(goods.Name) - goods.Name.Length)).ToString() + "}{2,-10}{3,-" + (20 - (Encoding.Default.GetByteCount(goods.Guige) - goods.Guige.Length)).ToString() + "}{4,-" + (14 - (Encoding.Default.GetByteCount(typename) - typename.Length)).ToString() + "}", goods.Number, goods.Name, goods.Price, goods.Guige, typename);
            }

            Console.WriteLine("按任意退出！");
            Console.ReadLine();
        }
        static void AddGoods(List<Goods> goodses, List<GoodsType> goodstype)
        {
            try
            {
                Goods goods = new Goods();
                goods.Number = GetMaxNumber(goodses) + 1;
                Console.WriteLine("请输入商品名称：");
                goods.Name = Console.ReadLine();
                Console.WriteLine("请输入商品价格：");
                goods.Price = double.Parse(Console.ReadLine());
                Console.WriteLine("请输入商品规格：");
                goods.Guige = Console.ReadLine();
                Console.WriteLine("请选择商品类型编号：");
                foreach (GoodsType gt in goodstype)
                {
                    Console.WriteLine("{0}、{1}", gt.Number, gt.TypeName);
                }
                goods.GoodsType = int.Parse(Console.ReadLine());
                goodses.Add(goods);
                Console.WriteLine("添加成功！");
                Thread.Sleep(2000);
            }
            catch
            {
                Console.WriteLine("添加失败！");
                Thread.Sleep(2000);
            }
        }
        static int GetMaxNumber(List<Goods> goodses)
        {
            int maxnumber = 0;
            foreach (Goods goods in goodses)
            {
                if (goods.Number > maxnumber)
                {
                    maxnumber = goods.Number;
                }
            }
            return maxnumber;
        }
    }
}