Alphanumeric

In C#, what is the Regex to check for alphanumeric characters? Everytime I try the expression below, it returns false!

^[a-zA-Z0-9]$

removing the ^ and $ doesnt work entirely either.

What is the text you are searching?

Don't forget to put a pipe-delimiter between them in the square brackets. Example, "^[a-z|A-Z|0-9]$".

Quote:

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Originally Posted by tacoman667

Don't forget to put a pipe-delimiter between them in the square brackets. Example, "^[a-z|A-Z|0-9]$".

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Not in a character class.

Thanks.

Well I got it to work to use 2 different patterns:

[a-zA-Z]
[0-9]


the text would be anything entered at all, such as a password. Want to check to see that it DOES contain at least 1 letter and number in the string given to this method. I would rather have it done in 1 go rather than calling it twice with seperate REGEX pattern

Code:

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^[a-zA-Z0-9]+$

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+ means "at least one"

alternatively

Code:

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string myregex = @"^(\d|\w)+$";

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