C# RegEx

Overview

• Namespace: System.Text.RegularExpressions
• Classes
• Capture: Results of a single match
• CaptureCollection
• Group: Result of a single group capture
• Match: Result of a single expression match
• MatchCollection
• MatchEvaluator: A delegate for use during replacement operations
• Regex: An instance of compiled regular expression
• Escape()
• IsMatch()
• Match()
• Matches()
• Replace()
• Split()
• Unescape()

Examples

• Simple matches

  Match m = Regex.Match(
    "abracadabra", "(a|b|r)+");
  if (m.Success)
  {
    log.Debug("Match string: " 
      + m.Value); 
    // Match string: abra
  }

• String replacement

  Regex.Replace(
  "abracadabra", "abra", "zzzz")
  // zzzzcadzzzz

• Not alphanumeric: [^a-zA-Z0-9]
• US zipcode: @”\d{5}([\-]\d{4})?”

References

• Regular Expression Syntax (Scripting)