1C#LINQ实例

} Console.ReadLine(); } } }
Console.WriteLine("数据长度：{0}",item.Key);
foreach(var val in item){
Console.WriteLine(val); } }
1、对数据分组的条件（item.Length） 2、分组中的数据
Console.ReadLine();
}
}
}
LINQ实例三
LINQ实例二
using System; using System.Collections.Generic; using System.Linq; using System.Text;
获取数据源
创建查询
Orderby 排序，默认是升序排序，在排
序条件后加 descending[diˈsendiŋ] ，
group item by item.Length into lengthGroups orderby lengthGroups.Key descending select lengthGroups; foreach (var item in query) {
into 关键字表示 将前一个查询的结果视为后续查询 的生成器，这里是跟 group by 一起使用的
{
var objs = new object[] { "Java","C++","C#",120,123,};
var query = objs.OfType<string>(); foreach (var item in query) {
类型过滤，调用 OfType<>()方法
Console.WriteLine("数据：{0}",item);
int[] number = { 2, 4, 3, 5, 7, 21, 34 }; var numQuere = from num in number
where (num % 2) != 0 orderby num descending select num; foreach (var num in numQuere) { Console.WriteLine("数字：{0}", num); } Console.ReadKey(); } } }
改为降序排列
执行查询
namespace ConsoleApplication21 {
class Program {
static void Main(string[] args) {
var languages = new string[] { "Java","C++","C#","C","HPH","VB","VC++",".NET"}; var query = from item in languages
using System; using System.Collections.Generic; using System.Linq; using System.Text;
namespace ConsoleApplication21
{
class Program
{
static void Main(string[] args)
LINQ实例一
using System; using System.Collections.Generic; using System.Linq; using System.Text;
Hale Waihona Puke namespace LINQ {
class Program {
static void Main(string[] args) {