What is the regex to match an alphanumeric 6 character string?

I need regex for asp.net application to match an alphanumeric string at least 6 charact开发者_Go百科ers long.

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I’m not familiar with ASP.NET. But the regular expression should look like this:

^[a-zA-Z0-9]{6,}$

^ and $ denote the begin and end of the string respectively; [a-zA-Z0-9] describes one single alphanumeric character and {6,} allows six or more repetitions.

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I would use this:

^[\p{L}\p{N}]{6,}$

This matches Unicode letters (\p{L}) and numbers (\p{N}), so it's not limited to common letters the Latin alphabet.

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^\w{6,}$ ^[a-zA-Z0-9]{6,}$

(Depending on the Regex implementation)

Note, that \w also matches _!