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

Substitution

Processing...

Code Generator

Language

Generated Code

using System; using System.Text.RegularExpressions; public class Example { public static void Main() { string pattern = @"(?i)<label id=""\{[\d\w-]+}"">([a-z ]+)<\/label>"; string substitution = @"$1"; string input = @"<p> <title>Contact Us</title> </p> <table dropzone=""copy""> <tbody> <tr> <td class=""label"" style=""cursor: default;"">Full Name</td> <td style= ""cursor: default;"">[<label id=""{0a4a7240-9606-416a-bf7b-ef11a47cca8e}"">First name</label>] [<label id=""{94263497-683b-46f9-ba0f-69f4c2736598}"">Last name</label>]</td> </tr> <tr> <td class=""label"" style=""cursor: d efault;"">Telephone</td> <td style=""cursor: default;"">[<label id=""{ce68e02e-e9fd-40ee-9375-ee1b05972e9b}"">Phone</label>]</td> </tr> <tr> <td class=""label"" style=""cursor: default;"">Email</td> <td style=""cursor: default;"">[<label id=""{411b580e-f7e9-4dd2-a70d-947385360cd0}"">Email</label>]</td> </tr> <tr> <td class=""label"" style=""cursor: default;"">Message</td> <td style=""cursor: default;"">[ <label id=""{13e2ff23-135c-4c6d-beb4-2960a533cb98}"">Your Message</label>]</td> </tr> <tr> <td class=""label"" style=""cursor: default;"">Company</td> <td style=""cursor: default;"">[<label id=""{c3f22c3a-8fc1 -48a4-8d6a-fe346024ca2b}"">Company</label>]</td> </tr> </tbody> </table> <p> </p> <p> </p>"; RegexOptions options = RegexOptions.Multiline; Regex regex = new Regex(pattern, options); string result = regex.Replace(input, substitution); } }

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