Any.Equals to case insensitive

Question

I want to make this case insensitive:

 if (usernames.Any(newName.Equals))

i have earlier used stringcomparer and regex to make things case insensitive but here the problem is that the method don't allow more arguments. I'm thankful for any help! :)

Edit: Forgot to say that usernames is a string array and newName is a string(my inputfield) if that matters.

score 3 · Accepted Answer · answered Apr 20 '20 at 11:06

3

You can rewrite predicate for Any a little bit

if (usernames.Any(n => newName.Equals(n, StringComparison.OrdinalIgnoreCase)))
{
    //rest of code
}

answered Apr 20 '20 at 11:06

Pavel Anikhouski

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Just interested, why the answer was downvoted – Pavel Anikhouski Apr 20 '20 at 11:10
1

I keep refreshing the page Im more amazed by the number of upvote. Imo it's a duplicate. And thats a lot of people standing in front of the roomba trying to salvage this question – Drag and Drop Apr 20 '20 at 11:13
1

@DragandDrop I guess that OP is asking how to use propery `StringComparison` with `Equals` within method group, rather then how to use it in `Any` method – Pavel Anikhouski Apr 20 '20 at 11:17

score 0 · Answer 2 · answered Apr 20 '20 at 11:06

0

Use String.Equals instead.

String.Equals(x.Username, (string)drUser["Username"], 
                   StringComparison.OrdinalIgnoreCase)

See more here

answered Apr 20 '20 at 11:06

Ygalbel

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StepUp · Answer 3 · 2020-04-20T11:16:00.313

0

You can use string.Equals which can handle NULL values:

if (usernames.Any(u => string.Equals(u, newName, 
    StringComparison.CurrentCultureIgnoreCase)))
{

}

As msdn says about Equals(String, String):

Determines whether two String objects have the same value.

Parameters a String

The first string to compare, or null.

Parameters b String

String The second string to compare, or null.

edited Apr 20 '20 at 11:16

answered Apr 20 '20 at 11:10

StepUp

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Any.Equals to case insensitive

3 Answers3