DataAnnotations - Disallow Numbers, or only allow given strings

Is it possible to use ASP.NET MVC 2's DataAnnotations to only allow characters (no number), or even provide a whitelist of allowed strings? Example?

From stackoverflow

• Use the RegularExpressionAttribute.

  Something like

  [RegularExpression("^[a-zA-Z ]*$")]
  

  would match a-z upper and lower case and spaces.

  A white list would look something like

  [RegularExpression("white|list")]
  

  which should only allow "white" and "list"

  [RegularExpression("^\D*$")]
  

  \D represents non numeric characters so the above should allow a string with anything but 0-9.

  Regular expressions are tricky but there are some helpful testing tools online like: http://gskinner.com/RegExr/

• Yes. Use " [RegularExpression]"

  This a great site on Regular expression http://www.regexlib.com/CheatSheet.aspx