how can I do use Except() between two SelectListItem lists

Question

I have two list of type IEnumerable <SelectListItem> I need to create a new IEnumerable <SelectListItem> with the elements of the first list that do not exist in the second list. how can i do this?

I tried to do it with a Except() but did not result...

Example code:

IEnumerable<SelectListItem> SelectListItemA = ....;
IEnumerable<SelectListItem> SelectListItemB = ....;
IEnumerable<SelectListItem> Except = SelectListItemA.Except(SelectListItemB);

I am not able to understand what you've written. Can you rephrase, please? — Leri, Nov 13 '12 at 13:32
And perhaps add a code example so we can see what you're trying to do? — Jim Mischel, Nov 13 '12 at 13:32

score 1 · Answer 1 · answered Nov 13 '12 at 13:36

1

Maybe something like:

var items1 = new List<SelectListItem>();
var items2 = new List<SelectListItem>();
//[.. populate lists here ..]
var onlyInFirst = items1.RemoveAll(item1 => items2.Any(item2 => item1.Value == item2.Value));

Except requires that Equals and GetHashCode is implemented in the traversed class.

answered Nov 13 '12 at 13:36

jgauffin

99,844
45
235
372

I've uploaded an example – Mainer007 Nov 13 '12 at 13:52
+1 for mentioning that "Except requires that Equals and GetHashCode is implemented in the traversed class." – Ryan Gates Nov 13 '12 at 17:07

how can I do use Except() between two SelectListItem lists

1 Answers1

Linked

Related