Checking if a string is NOT part of an Array (C#, Linq)

Question

I'm trying to use Linq to determine if a string is NOT in an array. The code I'm using is:

if (!stringArray.Any(soughtString.Contains)){
            doStuff();}

but it's not working. Obviously creating a foreach loop would suffice, but I'd like to understand why this line isn't working. And yes, the file has using System.Linq;

array.Contains("foo") ?

mituw16
– mituw16

2014-03-31 19:51:07 +00:00
Commented Mar 31, 2014 at 19:51 — mituw16
– mituw16, Commented Mar 31, 2014 at 19:51

Servy · Accepted Answer · 2014-03-31 19:50:56Z

5

You're not asking if the string is not in the array, you're asking if none of the strings in the array are sub-strings in some other string. Apparently at least one is, even though it's not equal.

You just want to do a simple Contains check:

if(!stringArray.Contains(soughtString))

answered Mar 31, 2014 at 19:50

Servy

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BradleyDotNET · Accepted Answer · 2014-03-31 19:52:15Z

3

You are currently passing the "Any" function the "Contains" method (which is then being passed each string in the array). In other, words:

array.Any(s => soughtString.Contains(s));

Likely, you want it the other way:

array.Any(s => s.Contains(soughtString));

answered Mar 31, 2014 at 19:52

BradleyDotNET

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