Linq简单用法

来源：互联网发布：书店管理系统数据库编辑：程序博客网时间：2024/06/05 19:22

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

namespace ConsoleApplicationExeiciseLinq
{
    class Program
    {
        static void Main(string[] args)
        {
            int[] nums = {1,2,3,4,5,6,7,8,9,10 };

            //简单Linq查询
            var mynum = from num in nums where num.Equals(2) select num;
            Console.WriteLine(mynum.ToArray()[0]);

var mynum1 = from num in nums where num>2&&num<5 select num;
Console.WriteLine(mynum1.ToArray()[1]);

            //分页排序
            var mynum2 = nums.Skip(2).Take(5);
            foreach (var item in mynum2)
            {
                Console.WriteLine(item);
            }

Console.WriteLine("-----------");

var mytest = from t in nums where t>3 select t;
Console.WriteLine("数目是:"+mytest.Count());

Console.WriteLine("-----------");

var mytest2 = nums.First(c=>c>1);
Console.WriteLine(mytest2.ToString());

            Console.ReadKey();
        }
    }
}