Basic LINQ query to check if string occurs within a list
Someone asked on Stack Overflow:
I have a list MyGroups and a string ‘AllowedGroups’.
For example I have string in MyGroups.Name = “Admin Only” and AllowedGroups =“Admin Only, Normal Group”. I can’t understand why the following expression evaluates to false when it should be true:
model.MyGroups.Any(m => m.Name.Contains(AllowedGroups)
I posted the following answer, which was chosen as the accepted answer and received 6 upvotes:
I think what you need, based on the information you’ve provided, is the opposite of what you have.
Something like this:
var allowedGroupsArray = AllowedGroups.Split(',');
var result = model.MyGroups.Any(m => allowedGroupsArray.Contains(m.Name));
Specifically, using Array.Contains() inside the .Any() call should generate basically a WHERE ... IN type clause in your SQL.
Originally posted on Stack Overflow — 6 upvotes (accepted answer). Licensed under CC BY-SA.
