Implementing server-side regex validation from client-side regex

Question

I have a textbox into which I only want alphanumeric characters and some punctuation; the JSFiddle is here and the JavaScript implementation looks like this:

var TheCleanString = TheInput.replace(/(^\s+|[^a-zA-Z0-9 \\s\(\)\.\-]+)/g, '');

As you can see, this only allows for alphanumeric characters, removes the leading whitespace and allows for parenthesis, dots and hyphens.

Now I want to use the SAME regex to validate that the string that's coming from the client passed this regex. I have something like this:

public bool MadeIt(TheCandidateString) 
{
   if (TheCandidateString passed this
       regex /(^\s+|[^a-zA-Z0-9 \\s\(\)\.\-]+)/g 
       then return true)
}

What's the best way to do this?

If you're using asp.net look at the RegEx validator - that'll check it on both sides — Liath
– Liath, Commented Jan 24, 2014 at 11:52

Plue · Accepted Answer · 2014-01-24 11:49:38Z

2

public bool MadeIt(string TheCandidateString) 
{
    string regex= @"yourRegex";
    var match = Regex.Match(TheCandidateString, regex, RegexOptions.IgnoreCase);
    return match.Success;
}

edited Jan 24, 2014 at 11:49

answered Jan 24, 2014 at 11:37

Plue

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