Why did this regex fail to match?

Question

I tested a regex using:

 Match match = Regex.Match(txtToMatch.Text,txtRegex.Text,RegexOptions.IgnoreCase);

 if (match.Success) {               
      MessageBox.Show("success");
 }

The regex that was used was /d. However, when I tested it on 9 it returned false. Why is this so?

thanks. i acidentally added "" around it twice

user1761786
– user1761786

2012-10-23 21:31:03 +00:00
Commented Oct 23, 2012 at 21:31 — user1761786
– user1761786, Commented Oct 23, 2012 at 21:31

keyser · Accepted Answer · 2012-10-23 21:33:38Z

3

I think what you need is \d, rather than /d

edited Oct 23, 2012 at 21:33

keyser

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answered Oct 23, 2012 at 21:29

JamesSwift

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Comments

Douglas · Accepted Answer · 2012-10-23 21:30:13Z

1

You need to use \d, not /d. To avoid getting your string treated as an escape sequence by C#, you could use a verbatim string: @"\d".

answered Oct 23, 2012 at 21:30

Douglas

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1 Comment

Douglas Over a year ago

There isn't, but it still gets treated as one, causing an error: "CS1009: Unrecognized escape sequence '\d'".

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