LINQ to Object的一个例子

查询两个集合中匹配数据并输出, 能写得这样容易真是让人有点震撼, 不学习真是要落伍了!

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

namespace ConsoleApplication4
{
    class Program
    {
        static void Main(string[] args)
        {
            List<Product> list = new List<Product>();
            list.Add(new Product("htc", 3000));
            list.Add(new Product("nokia", 2000));
            list.Add(new Product("moto", 1000));

            List<Company> company_list = new List<Company>();
            company_list.Add(new Company("htc","taiwan"));
            company_list.Add(new Company("nokia","swiden"));
            company_list.Add(new Company("moto","america"));

            var fliter = from Product p in list
                         join Company c1 in company_list on p.Name equals c1.CompanyName
                         where p.Price > 1000
                         select new { p.Name, p.Price, c1.CompanyAddress };

            foreach (var v in fliter)
            {
                Console.WriteLine(v.Name + v.CompanyAddress + v.Price );
            }

            Console.ReadKey();
        }
    }

    public class Product
    {
        public string Name { set; get; }
        public decimal Price { set; get; }

        public Product(string Name, decimal Price)
        {
            this.Name = Name;
            this.Price = Price;
        }
    }

    public class Company
    {
        public string CompanyName { set; get; }
        public string CompanyAddress { set; get; }

        public Company(string _Name, string _Address)
        {
            this.CompanyName = _Name;
            this.CompanyAddress = _Address;
        }
    }
}

************************************************************

这段集合初始化还是落伍了.

            List<Product> list = new List<Product>();
            list.Add(new Product("htc", 3000));
            list.Add(new Product("nokia", 2000));
            list.Add(new Product("moto", 1000));

            List<Company> company_list = new List<Company>();
            company_list.Add(new Company("htc","taiwan"));
            company_list.Add(new Company("nokia","swiden"));
            company_list.Add(new Company("moto","america"));

可以改造如下:

            List<Product> list = new List<Product>(){
              new Product("htc", 3000),
              new Product("nokia", 2000),
              new Product("moto",1000)           
            };

            List<Company> company_list = new List<Company>()
            {
               new Company("htc", "taiwan"),
               new Company("nokia", "swiden"),
               new Company("moto", "america")
            };