Problem in regular expression isMatch() method in C#

Question

I'm trying to match values by using regular expression, but I'm unable to get why following program returning me false as output.

Regex validateInputString = new Regex("^(\\d)*([a-z[A-Z]])+$");
    Console.WriteLine(validateInputString.IsMatch("343sdf"));

Could anyone please tell me?

leppie · Accepted Answer · 2010-11-29 11:16:52Z

1

[a-z[A-Z]] does not look very correct. Do you mean [a-zA-Z] ?

answered Nov 29, 2010 at 11:16

leppie

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Brian Rasmussen · Accepted Answer · 2010-11-29 11:17:56Z

0

You cannot have character classes within character classes. If you want to match either of the letters a-z and A-Z just use one character class [a-zA-z]. E.g.

Regex validateInputString = new Regex("^(\\d)*([a-zA-Z])+$");
Console.WriteLine(validateInputString.IsMatch("343sdf"));

The code above prints True.

answered Nov 29, 2010 at 11:17

Brian Rasmussen

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