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What's wrong with this regular expression?
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Crystal (VIP)
Hi,
I have a Regular Expression like this:

string s1=Regex.Replace("BA","A",@"C$&");

I assume that s1 will be "BC$&", however the real rusult is "BCA".
Is this a bug or my Replace method is wrong?
I am using .NET Framework 1.0.
Thanks!
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Niki Estner
"Crystal" <Click here to reveal e-mail address> wrote in
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[Original message clipped]

No, Replace is supposed to work like that.
See:
http://msdn.microsoft.com/library/default.asp?url=/library/en-us/cpgenref/html/cpconsubstitutions.asp

Using "string s1=Regex.Replace("BA","A",@"C$$&");" should get you the
expected result.

Niki
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Crystal (VIP)
Hi Niki,

I get the replacement string "C$&" from a text file and I can't modify it.
Is there another solution?
Thanks!

"Niki Estner" wrote:

[Original message clipped]
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Jon Skeet [C# MVP] (VIP)
Crystal <Click here to reveal e-mail address> wrote:
[Original message clipped]

Regex.Escape transforms "C$&" to "C\$&" - does that work?

--
Jon Skeet - <Click here to reveal e-mail address>
http://www.pobox.com/~skeet
If replying to the group, please do not mail me too
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James Curran
"Crystal" <Click here to reveal e-mail address> wrote in message
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You may not be able to change the text file, but you can certainly read
the string you read out of it.

--
Truth,
James Curran
Home: www.noveltheory.com Work: www.njtheater.com
Blog: www.honestillusion.com Day Job: www.partsearch.com
(note new day job!)
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Niki Estner
"Crystal" <Click here to reveal e-mail address> wrote in
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Why can't you modify the string? Replacing '$' with '$$' in the substitution
string will do it.

> Is there another solution?

Not with Regex.Replace.

Niki
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Crystal (VIP)
Hi there,

My text file is a financial report. There are thousands $ in it. "$&"
happens coincidently. If I change the replacement string, I have to change it
back.
Since there is no simple solution for this scenario, I have decided to use
string operation instead of Regular Expression.

Thanks,

"Niki Estner" wrote:

[Original message clipped]
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Niki Estner
"Crystal" <Click here to reveal e-mail address> wrote in
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[Original message clipped]

Maybe I was unclear about that: Regex.Replace will *always* replace "$$" to
"$". It's similar to "\\" in a string literal.

Niki
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System.Text.RegularExpressions.Regex




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