Compare list of string with string in linq

Question

I have list of string Like list1 contain 'pinky','smita','Rashmi','Srivani' And string is like String str = "pinky, Nandini' I want to check if neither of str present in list1,proceed further. how to do that?

Enumerable.Intersect Method - I think the result of this method should be empty in that case. dotnetfiddle.net/ctdmNn — Fildor
– Fildor, Commented May 12, 2022 at 8:56

Saeed Amiri · Accepted Answer · 2022-05-12 09:00:20Z

2

If I understood correctly, you want to return false in the example case, so you can use Any method: Check if none of the elements of the list is already in the str, here is a one liner:

if (!list.Any(x=>str.Contains(x))) ....

answered May 12, 2022 at 9:00

Saeed Amiri

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Prasad Telkikar · Accepted Answer · 2022-05-12 09:18:49Z

2

You can use combination of .Any() with .Contains() with !,

var list1 = new List<string>(){ "pinky", "smita", "Rashmi", "Srivani" };
string str = "pinky, Nandini";
var list2 = str.Split(",");

var nameExists = list2.Any(x => list1.Contains(x));
if(!nameExists)
{
   //Your code goes here.
}

As @Fildor said, you can use Intersect(). Elegant approach,

//All credit goes to @Fildor
var nameExists = list1.Intersect(list2).Any();

edited May 12, 2022 at 9:18

answered May 12, 2022 at 9:00

Prasad Telkikar

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