Use linq to check if an string value is in string array or List in C#

Question

I use the followings to check the array or List is Included a value:

string[] Names= { /* */};
string target = "";

if(Array.IndexOf(Names, target) > -1)
  //Do

So is there any linq command to check it?

Why do you need a lambda expression?

BoltClock
– BoltClock

2012-04-03 07:40:25 +00:00
Commented Apr 3, 2012 at 7:40 — BoltClock
– BoltClock, Commented Apr 3, 2012 at 7:40

Falanwe · Accepted Answer · 2012-04-03 07:42:12Z

14

Do you mean a Linq method?

If so, there is one:

Names.Contains(target)

Note there is no need for any lambda here.

answered Apr 3, 2012 at 7:42

Falanwe

4,74426 silver badges37 bronze badges

Sign up to request clarification or add additional context in comments.

1 Comment

Falanwe Over a year ago

@Killercam : actually, I suspect the compiler would generate the same IL as Names.Any( s => s == target ) because there is no better way to find a match in an Array. If Names was not an array but some other kind of IEnumerable with a more efficient search algorithm, contains would be more efficient indeed.

Wiktor Zychla · Accepted Answer · 2012-04-03 07:40:52Z

11

   Names.Any( s => s == target );

answered Apr 3, 2012 at 7:40

Wiktor Zychla

48.5k6 gold badges83 silver badges114 bronze badges

Comments

Arcturus · Accepted Answer · 2012-04-03 07:41:11Z

2

Something like this?

Names.Any(n => Equals(n, target));

answered Apr 3, 2012 at 7:41

Arcturus

27.2k10 gold badges95 silver badges110 bronze badges

Comments

SkonJeet · Accepted Answer · 2012-04-03 08:21:06Z

0

string[] Names= { /* */};
string target = "";

if(Names.Contains(target))
  //Do

answered Apr 3, 2012 at 8:21

SkonJeet

4,9555 gold badges25 silver badges32 bronze badges

Collectives™ on Stack Overflow

Use linq to check if an string value is in string array or List in C#

4 Answers 4

1 Comment

Comments

Comments

Comments

Your Answer

Hot Network Questions

Collectives™ on Stack Overflow

4 Answers 4

1 Comment

Comments

Comments

Comments

Your Answer

Sign up or log in

Post as a guest

Related