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

/
/
g

Test String

Code Generator

Language

Generated Code

using System; using System.Text.RegularExpressions; public class Example { public static void Main() { string pattern = @">(\d{4}\.\d{1,2}\.\d{1,2})<|>(\d+)<"; string input = @"<table class=""m_4348561758375603924m_886074067026015045MsoNormalTable"" border=""0"" cellspacing=""0"" cellpadding=""0"" width=""408"" style=""width:306.0pt;border-collapse:collapse""> <tbody> <tr style=""height:31.5pt""> <td width=""196"" nowrap style=""width:147.0pt;border:solid windowtext 1.0pt;background:yellow;padding:0cm 5.4pt 0cm 5.4pt;height:31.5pt""> <p class=""MsoNormal"" align=""left"" style=""text-align:left""><b><span lang=""EN-US"" style=""font-size:24.0pt;font-family:宋体;color:black"">Date<u></u><u></u></span></b></p> </td> <td width=""212"" nowrap style=""width:159.0pt;border:solid windowtext 1.0pt;border-left:none;background:yellow;padding:0cm 5.4pt 0cm 5.4pt;height:31.5pt""> <p class=""MsoNormal"" align=""left"" style=""text-align:left""><b><span lang=""EN-US"" style=""font-size:24.0pt;font-family:宋体;color:black"">Reset Code<u></u><u></u></span></b></p> </td> </tr> <tr style=""height:31.5pt""> <td width=""196"" nowrap style=""width:147.0pt;border:solid windowtext 1.0pt;border-top:none;padding:0cm 5.4pt 0cm 5.4pt;height:31.5pt""> <p class=""MsoNormal"" align=""left"" style=""text-align:left""><strong><span lang=""EN-US"" style=""font-size:24.0pt;font-family:宋体;color:black"">2017.8.10<u></u><u></u></span></strong></p> </td> <td width=""212"" nowrap style=""width:159.0pt;border-top:none;border-left:none;border-bottom:solid windowtext 1.0pt;border-right:solid windowtext 1.0pt;padding:0cm 5.4pt 0cm 5.4pt;height:31.5pt""> <p class=""MsoNormal"" align=""left"" style=""text-align:left""><strong><span lang=""EN-US"" style=""font-size:24.0pt;font-family:宋体;color:black"">123456<u></u><u></u></span></strong></p> </td> </tr> <tr style=""height:31.5pt""> <td width=""196"" nowrap style=""width:147.0pt;border:solid windowtext 1.0pt;border-top:none;padding:0cm 5.4pt 0cm 5.4pt;height:31.5pt""> <p class=""MsoNormal"" align=""left"" style=""text-align:left""><b><span lang=""EN-US"" style=""font-size:24.0pt;font-family:宋体;color:black"">2017.8.11<u></u><u></u></span></b></p> </td> <td width=""212"" nowrap style=""width:159.0pt;border-top:none;border-left:none;border-bottom:solid windowtext 1.0pt;border-right:solid windowtext 1.0pt;padding:0cm 5.4pt 0cm 5.4pt;height:31.5pt""> <p class=""MsoNormal"" align=""left"" style=""text-align:left""><strong><span lang=""EN-US"" style=""font-size:24.0pt;font-family:宋体;color:black"">123456<u></u><u></u></span></strong></p> </td> </tr> </tbody> </table>"; foreach (Match m in Regex.Matches(input, pattern)) { 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