fork download
copy 
  1. using System;
  2. using System.Collections.Generic;
  3. using System.Linq;
  4.  
  5.     public class EmployeeDto
  6.     {
  7.         public int Id { get; set; }
  8.         public string Name { get; set; }
  9.     }
  10.  
  11.     public class EmployeeEntity
  12.     {
  13.         public int Id { get; set; }
  14.         public string FullName { get; set; }
  15.     }
  16.  
  17.     class Program
  18.     {
  19.         static void Main(string[] args)
  20.         {
  21.             List<object> o = new List<object>();
  22.             o.Add(new EmployeeDto { Id = 1, Name = "Bob" });
  23.             o.Add(null);
  24.             o.Add(new EmployeeDto { Id = 2, Name = "Foo" });
  25.             o.Add(null);
  26.             o.Add(null);
  27.  
  28.             var employeeEntityList = MapList1(o);
  29.             var employeeEntityList2 = MapList2(o);
  30.  
  31.             PrintEmployee(employeeEntityList);
  32.             Console.WriteLine("--");
  33.             PrintEmployee(employeeEntityList2);
  34.  
  35.             Console.ReadKey();
  36.         }
  37.  
  38.         private static void PrintEmployee(IEnumerable<EmployeeEntity> employeeEntityList)
  39.         {
  40.             foreach (var item in employeeEntityList)
  41.             {
  42.                 Console.WriteLine(item.FullName);
  43.             }
  44.         }
  45.  
  46.         private static IEnumerable<EmployeeEntity> MapList1(List<object> o)
  47.         {
  48.             return
  49.                 from i in o.OfType<EmployeeDto>()
  50.                 select new EmployeeEntity
  51.                 {
  52.                     Id = i.Id,
  53.                     FullName = i.Name
  54.                 };
  55.         }
  56.  
  57.         private static IEnumerable<EmployeeEntity> MapList2(List<object> o)
  58.         {
  59.             return
  60.                 from si in o
  61.                 let i = si as EmployeeDto
  62.                 where i != null
  63.                 select new EmployeeEntity
  64.                 {
  65.                     Id = i.Id,
  66.                     FullName = i.Name
  67.                 };
  68.         }
  69.     }
  70.  
Success #stdin #stdout 0.04s 38008KB
comments (?)
stdin
copy 
Standard input is empty
stdout
copy 
Bob
Foo
--
Bob
Foo
https://ideone.com/MZGSK
language:
C# (gmcs 5.20.1)
created:
13 years ago
visibility:
public

Share or Embed source code

Discover > Sphere Engine API

The brand new service which powers Ideone!

Discover > IDE Widget

Widget for compiling and running the source code in a web browser!