Select with Function : Select « LINQ « VB.Net






  1. VB.Net
  2. LINQ
  3. Select

Select with Function

 

Imports System
Imports System.Linq
Imports System.Collections.Generic
    Structure Pet
        Public Name As String
        Public Age As Integer
    End Structure


Public Class Example

    Public Shared Sub Main() 
        Dim cats() As Pet = {New Pet With {.Name = "A", .Age = 8}, _
                             New Pet With {.Name = "B", .Age = 4}, _
                             New Pet With {.Name = "C", .Age = 1}}

        Dim dogs() As Pet = {New Pet With {.Name = "D", .Age = 3}, _
                             New Pet With {.Name = "E", .Age = 14}, _
                             New Pet With {.Name = "F", .Age = 9}}

        Dim animals() As IEnumerable(Of Pet) = {cats, dogs}

        Dim query As IEnumerable(Of String) = (animals.SelectMany(Function(pets) pets.Select(Function(pet) pet.Name)))

        For Each name As String In query
            Console.WriteLine(name)
        Next


    End Sub
End Class








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