linq语法1

            先看一下linq如何过滤数据。类似sql语句，是sql语句的倒装 from where select  。where 也可以写多个。

           //利用linq筛选数据
            string[] strs = new String[] { "One", "Two", "Three" };

            var  query = from ss in strs where ss.StartsWith("T") select ss;//查询开头是t的
            foreach (String s in query)
            {

                Console.WriteLine(s);//输出 two three

            }

            Console.ReadLine();

           
        //创建实体类
        public class Programer
        {

            public String Name { get; set; }

            public String Language { get; set; }

        }

        Programer[] ps = new Programer[] 
        { 

            new Programer(){ Name="张?三y", Language="C#"},

            new Programer(){ Name="李?四?", Language="C#"},

            new Programer(){ Name="王?五?", Language="Java"}

         };
          //筛选Language==c# 和name==张?三y 的数据
          var queryPs = from p in ps

                          where p.Language == "C#"
                          where p.Name == "张?三y"

                          select new { 
                              Name = p.Name,
                              Language = p.Language 
                          };
            //foreach 循环输出
            foreach (var p in queryPs)
            {
                Console.WriteLine(String.Format("Name:{0}\t\tLanguage:{1}", p.Name, p.Language));
            }
            Console.ReadLine();