LINQ with page creteria

Bharti Saini

Vote:

Hi,

I have two criteria in my code

var systemPages = DataFactory.Instance.FindPagesWithCriteria(PageReference.StartPage, criteria);

var pages = DataFactory.Instance.FindPagesWithCriteria(PageReference.StartPage, criterias);

I want the pages from criteria system pages which is not in criteria pages

I am using LINQ

var matches = (pages.Intersect(systemPages));

but i am getting nothing. Please tell is there any way to get the pages from pages which is not in systemPages

#46141

Nov 30, 2010 6:54

Magnus Rahl

Vote:

If you want the pages in A that are not also in B, you should use Except, not Intersect. If that isn't working I'm guessing the default comparer isn't behaving you want it to (comparing page id, version and language for example). In that case you'd have to try the overload which takes an IEqualityComparer do to the job. Tip: Google AnonymousComparer and LambdaComparer to find inspiration on how to build a comparer that accepts a lambda expression to compare by.

Good luck!
/Magnus

#46142

Nov 30, 2010 7:53