Regular Expressions 101

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An explanation of your regex will be automatically generated as you type.
Detailed match information will be displayed here automatically.
  • All Tokens
  • Common Tokens
  • General Tokens
  • Anchors
  • Meta Sequences
  • Quantifiers
  • Group Constructs
  • Character Classes
  • Flags/Modifiers
  • Substitution
  • A single character of: a, b or c
    [abc]
  • A character except: a, b or c
    [^abc]
  • A character in the range: a-z
    [a-z]
  • A character not in the range: a-z
    [^a-z]
  • A character in the range: a-z or A-Z
    [a-zA-Z]
  • Any single character
    .
  • Alternate - match either a or b
    a|b
  • Any whitespace character
    \s
  • Any non-whitespace character
    \S
  • Any digit
    \d
  • Any non-digit
    \D
  • Any word character
    \w
  • Any non-word character
    \W
  • Non-capturing group
    (?:...)
  • Capturing group
    (...)
  • Zero or one of a
    a?
  • Zero or more of a
    a*
  • One or more of a
    a+
  • Exactly 3 of a
    a{3}
  • 3 or more of a
    a{3,}
  • Between 3 and 6 of a
    a{3,6}
  • Start of string
    ^
  • End of string
    $
  • A word boundary
    \b
  • Non-word boundary
    \B

Regular Expression
No Match

/
/
gm

Test String

Code Generator

Language

Generated Code

using System; using System.Text.RegularExpressions; public class Example { public static void Main() { string pattern = @"1-0:16\.7\.0\*255"":(-?\d+\.?\d+)|1-0:2\.8\.0\*255\"":(-?\d+\.?\d+)|1-0:1\.8\.0\*255\"":(-?\d+\.?\d+)"; string input = @"{""meterId"":""1KFM0000028196"",""deviceId"":""EBSD1425009486"",""msgType"":""EMETER_OBIS_V2"",""measurements"":[{""timestamp"":""2023-04-02T11:32:33Z"",""values"":{""1-0:96.90.2*1"":""7E2005D2"",""1-0:0.2.0*0"":""312E3033"",""1-0:14.7.0*255"":49.900001525878906,""1-0:81.7.26*255"":52,""1-0:81.7.15*255"":331,""1-0:81.7.4*255"":188,""1-0:81.7.2*255"":239,""1-0:81.7.1*255"":117,""1-0:71.7.0*255"":1.1100000143051147,""1-0:51.7.0*255"":0.73000001907348633,""1-0:31.7.0*255"":1.8999999761581421,""1-0:72.7.0*255"":235.5,""1-0:52.7.0*255"":233.80000305175781,""1-0:32.7.0*255"":235.89999389648438,""1-0:16.7.0*255"":-152,""1-0:2.8.0*255"":0.52590000629425049,""1-0:1.8.0*255"":10474.70703125,""1-0:96.1.0*255"":""0A014B464D0000006E24"",""1-0:96.50.1*1"":""4B464D""}}]}"; RegexOptions options = RegexOptions.Multiline; foreach (Match m in Regex.Matches(input, pattern, options)) { Console.WriteLine("'{0}' found at index {1}.", m.Value, m.Index); } } }

Please keep in mind that these code samples are automatically generated and are not guaranteed to work. If you find any syntax errors, feel free to submit a bug report. For a full regex reference for C#, please visit: https://msdn.microsoft.com/en-us/library/system.text.regularexpressions.regex(v=vs.110).aspx