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Need help with a couple of regex and replacement string

Posted on 2011-09-20
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Last Modified: 2012-08-13
1.      DisplayName:  I want to add a space after the comma for example: Doe,john  This should be Doe, John
2.      Telephone:  I want it formatted as “(323) 442-2455”, not as “+1 323 442 2455”

I need help with the regex for the above 2 and then the Replacement string for Regex.Replace method.  Thank you.

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Question by:lapucca
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Expert Comment

by:Terry Woods
ID: 36571341
1.
Find pattern:
,(?!\s)
and replace with
,
The comma on the previous line has a space after it. Note that the negative lookahead (?!\s) prevents a space being added if the comma already has a space after it.
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Expert Comment

by:Terry Woods
ID: 36571350
2.
Find pattern "^\+\d\s?(\d{3})\s?(\d{3})\s?(\d{4})"
And replace with:
($1) $2-$3
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Accepted Solution

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Terry Woods earned 500 total points
ID: 36571356
I think this is the C# syntax:
  myResult = Regex.Replace(myString,@",(?!\s)",", ");
  myResult = Regex.Replace(myString,@"^\+\d\s?(\d{3})\s?(\d{3})\s?(\d{4})","($1) $2-$3");
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Author Comment

by:lapucca
ID: 36571358
So, using http://msdn.microsoft.com/en-us/library/e7f5w83z.aspx 
I'm not sure what to put for the replacement string for the Regex.Replace method though.  I mean what to put there so it would keep all the name's text and also adding that needed space after the comman?  Thanks.
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Author Comment

by:lapucca
ID: 36571367
Terry, where can I find information on what is this $1, $2, $3.....  Is this grouping in regex?
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Expert Comment

by:Terry Woods
ID: 36571371
Yes, it refers back to the 1st, 2nd and 3rd groups defined by the round brackets in the pattern.
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Author Comment

by:lapucca
ID: 36571392
Ok, I can see that for the phone number.  However, I'm still not able to see that for the display name where I want to add a space where there isn't one.  The replacement string only has ", ".  That doesn't seem right, does it?
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Expert Comment

by:Terry Woods
ID: 36571397
Yes - you're replacing a [comma without a space after it] with [a comma with a space after it]
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Author Comment

by:lapucca
ID: 36571416
What about the rest of the Displayname's text?  Are you saying it only replaces the comman? so if i have this :
Mystring = "Doe,John";
Regext.Relace(Mystring, ",@",(?!\s)",", ");
now Mystring would contian "Doe, John"?
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Expert Comment

by:Terry Woods
ID: 36571419
Yes, that's right.
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Expert Comment

by:Terry Woods
ID: 36571420
Except there's an error in your code. It should be:
Regext.Relace(Mystring, @",(?!\s)",", ");
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Author Closing Comment

by:lapucca
ID: 36571421
Thank you.
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Expert Comment

by:Terry Woods
ID: 36571423
Correction!
Regex.Replace(Mystring, @",(?!\s)",", ");
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