mcs/tests/gtest-linq-07.cs

   1
   2
   3 using System;
   4 using System.Collections.Generic;
   5 using System.Linq;
   6
   7 class SelectMany
   8 {
   9         public static int Main ()
  10         {
  11                 int[] a1 = new int [] { 0, 1 };
  12                 string[] a2 = new string [] { "10", "11" };
  13
  14                 int id = 0;
  15
  16                 // Explicitly typed
  17                 var e = from int i1 in a1
  18                         from string i2 in a2
  19                         select new { i1, i2 };
  20
  21                 foreach (var item in e) {
  22                         Console.WriteLine (item);
  23
  24                         if (item.i1 != id / 2)
  25                                 return 1;
  26
  27                         if (id % 2 == 0)
  28                                 if (item.i2 != "10")
  29                                         return 2;
  30
  31                         ++id;
  32                 }
  33
  34                 var e2 = from int i1 in a1
  35                         where i1 > 0
  36                         from string i2 in a2
  37                         from int i3 in a1
  38                         orderby i3
  39                         select new { pp = 9, i1, i3 };
  40
  41                 id = 0;
  42                 foreach (var item in e2) {
  43                         Console.WriteLine (item);
  44
  45                         if (item.i1 != 1)
  46                                 return 3;
  47
  48                         if (id / 2 != item.i3)
  49                                 return 4;
  50                         ++id;
  51                 }
  52
  53                 // Implicitly typed
  54                 var e3 = from i1 in a1
  55                         from i2 in a2
  56                         select new { i1, i2 };
  57
  58                 id = 0;
  59                 foreach (var item in e3) {
  60                         Console.WriteLine (item);
  61
  62                         if (item.i1 != id / 2)
  63                                 return 1;
  64
  65                         if (id % 2 == 0)
  66                                 if (item.i2 != "10")
  67                                         return 2;
  68
  69                         ++id;
  70                 }
  71
  72                 Console.WriteLine ("OK");
  73                 return 0;
  74         }
  75 }
  76