For educational purposes I tried to convert the following Linq expression from the book "Linq in action" into VB.net
Original C#
var list =
from book in SampleData.Books
group book by new { book.Publisher.Name, book.Subject }
into grouping
select new {
Publisher = grouping.Key.Publisher,
Subject = grouping.Key.Subject,
Book = grouping
};
My attempt:
Dim list = _books.GroupBy(Function(book) New With {.Publisher = book.Publisher.Name,
book.Subject}).
Select(Function(grouping) New With {.Publisher = grouping.Key.Publisher,
.Subject = grouping.Key.Subject,
.Books = grouping})
For Each item In list
Console.WriteLine("Publisher:" & item.Publisher & ", Subject:" & item.Subject)
For Each Book In item.Books
Console.WriteLine(" " & Book.Title)
Next
Next
This leads to the following output:
Publisher:FunBooks, Subject:Fun
Funny Stories
Publisher:Joe Publishing, Subject:Work
LINQ rules
Publisher:Joe Publishing, Subject:Work
C# on rails
Publisher:Joe Publishing, Subject:Fun
All your base are belong to us
Publisher:FunBooks, Subject:Fun
Bonjour mon Amour
I expected, that the books "LINQ rules" and "C# on rails" are grouped as well as the books "Funny Stories" and "Bonjour mon Amour" because they have the same Publisher and Subject. My anonymous key consists a new object of two simple strings.
I already tried to search in SO, but other (or) answers do not solve my problem. Even some code translators like telerik or carlosag are no help in this case.