89. LINQ - 그룹알고리즘

using System;
using System.Collections.Generic;
using System.Linq;
using System.Collections;

namespace LINQ
{
    public class ProductInfo
    {
        public string Name { get; set; }
        public int Quantity { get; set; }
    }

    public class 그룹알고리즘
    {
        public static void Main()
        {
            //[1] Input
            List<ProductInfo> lst = new List<ProductInfo>()
            {
                new ProductInfo{Name="RADIO", Quantity=3},
                new ProductInfo{Name="TV", Quantity=1},
                new ProductInfo{Name="RADIO", Quantity=2},
                new ProductInfo{Name="DVD", Quantity=5}
            };

            //[2] Process
            IEnumerable<IGrouping<string, ProductInfo>> q =
                from p in lst group p by p.Name;

            //[3] Output
            foreach (IGrouping<string, ProductInfo> item in q)
            {
                Console.WriteLine("{0}", item.Key);
                foreach (ProductInfo pi in item)
                {
                    Console.WriteLine("상품:{0}, 판매량:{1}", pi.Name, pi.Quantity);
                }
            }
        }
    }
}

 

/*
Google에서 "LINQ 101" 로 검색하면
MSDN에 "101 LINQ Samples" 로 LINQ관련 문법 및 정보가 카테고리별로
정리되어 있으니 참고할 것!
*/