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I’m using an asp.net Web Forms RegularExpressionValidator Control to validate a text field to ensure it contains a series of email addresses separated by semicolons.
What is the proper regex for this task?
I think this one will work:
^([A-Za-z0-9._%+-]+@[A-Za-z0-9.-]+\.[A-Za-z]{2,4}(;|$))+Breakdown:
[A-Za-z0-9._%+-]+@[A-Za-z0-9.-]+\.[A-Za-z]{2,4}: valid email (from http://www.regular-expressions.info/)(;|$): either semicolon or end of string(...)+: repeat all one or more timesMake sure you are using case-insensitive matching. Also, this pattern does not allow whitespace between emails or at the start or end of the string.