Question

Need help with converting next statement to LINQ:

SELECT * FROM comments
WHERE good_id = '19' AND allow = '1'
ORDER BY IF(parent_id = 0, id, parent_id) DESC, id ASC

It’s statement show the comment in next order list:

--Comment
--Subcomment (if parent_id != 0)
--Subcomment (if parent_id != 0)
--Comment
--Subcomment (if parent_id != 0)
etc.

But I don’t know how to implement it on LINQ. Any ideas?

Answer 1

have not compiled this but I think I am on the right path.

var comments = from c in db.Comments
    where c.good_id == 19 && c.allow = "1"
    orderby myFunction(c.parent_id, c.id) descending, id ascending
    select comments;


public int myFunction(int parentID, in ID)
{
    return parent_id == 0 ? id : parent_id;
}