.NET Regex

System.Text.RegularExpressions .NET Regex.Replace

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Replace and named capturing group example

Nearly all modern regular expression engines support numbered capturing groups and numbered backreferences. Long regular expressions with lots of groups and backreferences may be hard to read. They can be particularly difficult to maintain as adding or removing a capturing group in the middle of the regex upsets the numbers of all the groups that follow the added or removed group.

Tags: #captures, #group, #hour, #minutes, #seconds, #time. Views: 4164. admin, 3/30/2015
Link 1: http://www.systemtextregularexpressions.com/r5/replace-and-named-capturing-group-example
Link 2: http://www.systemtextregularexpressions.com/r5 (short)
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    RegexOptions

    IsMatch=true

    Result

    Replace text example and captures the matched subexpression into a named group. Example 1: Current time: 02h 21m 32s Example 2: Current time: 16h 45m 56s Example 3: Current time: 19h 02m 11s

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    Source code

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    //.NET Regex.Replace Online Tester: www.systemtextregularexpressions.com

    //Namespace
    using System.Text.RegularExpressions;

    //Regex Pattern
    string pattern = @"(?<hour>\d{2}):(?<minute>\d{2}):(?<second>\d{2})";

    //Regex example #1
    Regex r = new Regex(@"(?<hour>\d{2}):(?<minute>\d{2}):(?<second>\d{2})");
    string result1 = r.Replace("input text", "replacement text");

    //Regex example #2
    string result2 = Regex.Replace("input text", @"(?<hour>\d{2}):(?<minute>\d{2}):(?<second>\d{2})", "replacement text");
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    '.NET Regex.Replace Online Tester: www.systemtextregularexpressions.com

    'Namespace
    Imports System.Text.RegularExpressions

    'Regex Pattern
    Dim pattern As String = "(?<hour>\d{2}):(?<minute>\d{2}):(?<second>\d{2})"

    'Regex example #1
    Dim r As Regex = New Regex("(?<hour>\d{2}):(?<minute>\d{2}):(?<second>\d{2})")
    Dim result1 As String = r.Replace("input text", "replacement text")

    'Regex example #2
    Dim result2 As String = Regex.Replace("input text", "(?<hour>\d{2}):(?<minute>\d{2}):(?<second>\d{2})", "replacement text")