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Regular Expressions

 
GeneralRe: Parsing ASCII-Only string Pin
Marco Bertschi7-Feb-14 2:50
professionalMarco Bertschi7-Feb-14 2:50 
GeneralRe: Parsing ASCII-Only string Pin
Richard Deeming7-Feb-14 3:04
mveRichard Deeming7-Feb-14 3:04 
QuestionRe: Parsing ASCII-Only string Pin
Marco Bertschi7-Feb-14 3:08
professionalMarco Bertschi7-Feb-14 3:08 
AnswerRe: Parsing ASCII-Only string Pin
Richard Deeming7-Feb-14 3:14
mveRichard Deeming7-Feb-14 3:14 
GeneralRe: Parsing ASCII-Only string Pin
Marco Bertschi7-Feb-14 3:33
professionalMarco Bertschi7-Feb-14 3:33 
QuestionParsing a string with match groups Pin
Dominick Marciano23-Aug-13 10:47
professionalDominick Marciano23-Aug-13 10:47 
AnswerRe: Parsing a string with match groups Pin
Matt T Heffron28-Oct-13 12:33
professionalMatt T Heffron28-Oct-13 12:33 
AnswerRe: Parsing a string with match groups Pin
Gabriel Szabo7-Nov-13 22:27
Gabriel Szabo7-Nov-13 22:27 
You can use the alternation syntax "(a|b)". A match in your case is an expression in form "parameter=value", or an operator. Operator can be "or" or "and" and must have a space before and after.

Following pattern produces the results you wanted. For an input string "Name=John or Name=Jane and Date=Now" you get matches "Name=John", " or ", "Name=Jane", " and ", "Date=Now":
C#
"(\w+=\w+|\s(or|and)\s)"

If you want to use regex for validation only, you can do it this way (note that you get only a single match with this pattern):
C#
Regex.IsMatch(inputStr, "^(\w+=\w+|\s(or|and)\s)+$");

And you can go even further with validation. Following pattern uses positive look ahead/behind syntax to ensure that operators are enclosed with valid expressions:
C#
Regex.IsMatch(inputStr, "^(\w+=\w+|(?<=\w+=\w+)\s(or|and)\s(?=\w+=\w+))+$");

Gabriel Szabo


modified 8-Nov-13 3:57am.

QuestionMatching a string. Pin
Septimus Hedgehog19-Aug-13 5:48
Septimus Hedgehog19-Aug-13 5:48 
AnswerRe: Matching a string. Pin
PIEBALDconsult19-Aug-13 6:03
professionalPIEBALDconsult19-Aug-13 6:03 
GeneralRe: Matching a string. Pin
Septimus Hedgehog19-Aug-13 6:27
Septimus Hedgehog19-Aug-13 6:27 
GeneralRe: Matching a string. Pin
PIEBALDconsult19-Aug-13 6:31
professionalPIEBALDconsult19-Aug-13 6:31 
GeneralRe: Matching a string. Pin
Septimus Hedgehog19-Aug-13 6:44
Septimus Hedgehog19-Aug-13 6:44 
GeneralRe: Matching a string. Pin
PIEBALDconsult19-Aug-13 10:01
professionalPIEBALDconsult19-Aug-13 10:01 
GeneralRe: Matching a string. Pin
Septimus Hedgehog20-Aug-13 0:04
Septimus Hedgehog20-Aug-13 0:04 
QuestionHelp wanted with regex format. Pin
Septimus Hedgehog31-Jul-13 4:17
Septimus Hedgehog31-Jul-13 4:17 
AnswerRe: Help wanted with regex format. Pin
Richard Deeming31-Jul-13 4:47
mveRichard Deeming31-Jul-13 4:47 
GeneralRe: Help wanted with regex format. Pin
Septimus Hedgehog31-Jul-13 4:53
Septimus Hedgehog31-Jul-13 4:53 
AnswerRe: Help wanted with regex format. Pin
OriginalGriff31-Jul-13 5:10
mveOriginalGriff31-Jul-13 5:10 
GeneralRe: Help wanted with regex format. Pin
Septimus Hedgehog31-Jul-13 5:34
Septimus Hedgehog31-Jul-13 5:34 
GeneralRe: Help wanted with regex format. Pin
OriginalGriff31-Jul-13 5:40
mveOriginalGriff31-Jul-13 5:40 
GeneralRe: Help wanted with regex format. Pin
Septimus Hedgehog31-Jul-13 6:15
Septimus Hedgehog31-Jul-13 6:15 
GeneralRe: Help wanted with regex format. Pin
Bernhard Hiller31-Jul-13 23:26
Bernhard Hiller31-Jul-13 23:26 
GeneralRe: Help wanted with regex format. Pin
Septimus Hedgehog1-Aug-13 0:58
Septimus Hedgehog1-Aug-13 0:58 
GeneralRe: Help wanted with regex format. Pin
Bernhard Hiller1-Aug-13 21:39
Bernhard Hiller1-Aug-13 21:39 

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