Match pattern?

[Eric Gunnerson]

You need to escape the "+" sign that you're matching:

> sPattern = "^(?<sign>\\+|-)?(?<value>\\d+)$";

I'd write it like this to make it easier to read:

> sPattern = @"^(?<sign>\+|-)?(?<value>\d+)$";

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"David Chu" <chud@hotmail.com> wrote in message
news:3ea47381$1@tnews.web.devx.com...
>
> I use the following statement to do a search:
>
> // optional "+" or "-" (0-1 times), followed by at least one digit
> // 1st group named "sing", and 2nd group named "value"
> sPattern = "^(?<sign>+|-)?(?<value>\\d+)$";
> Match Regex.Match(sMyText.Trim(), sPattern); // exception error raised!
>
> The following is the error message:
>
> System.ArgumentException: parsing "^(?<sign>+|-)?(?<value>\d+)$" -
> Quantifier {x,y} following nothing.
>
> Is my search pattern wrong?
>
> D. Chu

[David Chu]

I use the following statement to do a search:

// optional "+" or "-" (0-1 times), followed by at least one digit
// 1st group named "sing", and 2nd group named "value"
sPattern = "^(?<sign>+|-)?(?<value>\\d+)$";
Match Regex.Match(sMyText.Trim(), sPattern); // exception error raised!

The following is the error message:

System.ArgumentException: parsing "^(?<sign>+|-)?(?<value>\d+)$" -
Quantifier {x,y} following nothing.

Is my search pattern wrong?

D. Chu