Your custom method returns a string that replaces the matched input. Public Function MatchEvaluatorMethod(match As Match) As String public string MatchEvaluatorMethod(Match match) The custom method must have the following signature to match the MatchEvaluator delegate. The evaluator parameter is the delegate for a custom method that you define and that examines each match. The regular expression is the pattern defined by the constructor for the current Regex object. The method is equivalent to calling the Regex.Matches(String, Int32) method and passing the first count Match objects in the returned MatchCollection collection to the evaluator delegate.įor more details about startat, see the Remarks section of Match(String, Int32).
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The replacement string cannot readily be specified by a regular expression replacement pattern.
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The Regex.Replace(String, MatchEvaluator, Int32, Int32) method is useful for replacing a regular expression match if any of the following conditions is true: For more information about time-outs, see the Remarks section. In a specified input substring, replaces a specified maximum number of strings that match a regular expression pattern with a specified replacement string.Ī time-out occurred. In a specified input string, replaces all strings that match a regular expression pattern with a specified replacement string. In a specified input string, replaces all strings that match a specified regular expression with a string returned by a MatchEvaluator delegate. In a specified input string, replaces a specified maximum number of strings that match a regular expression pattern with a string returned by a MatchEvaluator delegate. In a specified input string, replaces a specified maximum number of strings that match a regular expression pattern with a specified replacement string. Specified options modify the matching operation. In a specified input string, replaces all strings that match a specified regular expression with a specified replacement string. Replace(String, String, String, RegexOptions) Additional parameters specify options that modify the matching operation and a time-out interval if no match is found. Replace(String, String, String, RegexOptions, TimeSpan)
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Replace(String, String, MatchEvaluator, RegexOptions) In a specified input string, replaces all substrings that match a specified regular expression with a string returned by a MatchEvaluator delegate.
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Replace(String, String, MatchEvaluator, RegexOptions, TimeSpan) In a specified input substring, replaces a specified maximum number of strings that match a regular expression pattern with a string returned by a MatchEvaluator delegate. In this article Overloads Replace(String, MatchEvaluator, Int32, Int32) In a specified input string, replaces strings that match a regular expression pattern with a specified replacement string.