CODEWITHSUNDEEP
c#if-statementalphanumeric
Quantum_Kernel
Quantum_Kernel

Reputation: 333

Check if string contains non-alphanumeric except underscore

I'm trying to write in if statement that runs if a string contains any non-alpahnumeric character with the exception of an underscore.

This is what I have and I'm trying to figure a simple way to add the exception for underscore but I'm having difficulty. (where key is a string).

// Check for non-alphanumerics except underscore
if (!(key.All(char.IsLetterOrDigit)))                                        
{
    validationResult = false;
}

Upvotes: 0

Views: 3239

Answers (1)

Damien_The_Unbeliever
Damien_The_Unbeliever

Reputation: 239664

You just need to extend the logic within the All:

if (!(key.All(c => char.IsLetterOrDigit(c) || c=='_')))

Upvotes: 5

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