88.C# - 프로젝션

프로젝션 : 결과셋의 출력 형태를 테이터 소스와 다르게 변형하는 것입니다.

[재훈이형블로그]

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Program.cs

using System; using System.Collections.Generic; using System.Linq; public class Product {     public string Name { get; set; }     public int Quantity { get; set; } } public class ProName {    public string ModelNAme { get; set; }    } public class 프로젝션 {     public static void Main(string[] args)     {         int[] data = { 3, 4, 5, 2, 1 };         var query = from d in data where d % 2 == 0 select d; //결과유출         IEnumerable<int> q = from d in data where d % 2 == 0 select d;         int[] even = (from d in data where d % 2 == 0 select d).ToArray();         List<int> lst = (from d in data where d % 2 == 0 select d).ToList();         Product[] products = {                                 new Product{Name=".net", Quantity=1000},                                 new Product{Name="Java",Quantity=10} };         // var pro = from p in product select p;         // product 클레스를 ProName 클레스로 변형하여 출력         IEnumerable<ProName> pro = from p in products select                                                  new ProName { ModelNAme = p.Name };         foreach (var item in pro) {                              Console.WriteLine("{0}", item.ModelNAme);  }     } }

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결과화면

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