.net - regex for alphanumeric, but at least one character -

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In my asp.net page, I have an input box that should have the following verification:

Must be alphanumeric, with at least 1 character (i.e. all numbers can not be). 

  ^ \ d * [a-zA-Z] [a-zA-Z0- 9] * $

In fact it means:

  • Zero or more ASCII points;
  • An alphabetical ASCII character;
  • Zero or more alphanumeric ASCII characters.

Try some tests and you'll see that it will pass an alphanumeric ASCII string where at least one non-numerical ASCII character will be required.

The key is on the \ d * front without it the regex becomes more odd to do it.


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