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
Processing...

Test String

Code Generator

Language

Generated Code

using System; using System.Text.RegularExpressions; public class Example { public static void Main() { string pattern = @"sample=(?<sample1>\""[^\""]+)\"""; string input = @"2017-12-06T11:57:03.744000 POSITION 0 lang=Albanian sample=""Unë mund të ha qelq dhe nuk më gjen gjë."" constant=""double quotes"" 'single quotes' \slashes\ `~!@#$%^&*()-_=+{}|;:<>,./? [brackets] <script>alert(""raw event unescaped!"")</script> 2017-12-06T11:40:03.744000 POSITION 1 lang=Arabic sample=""أنا قادر على أكل الزجاج و هذا لا يؤلمني."" odd=1 constant=""double quotes"" 'single quotes' \slashes\ `~!@#$%^&*()-_=+{}|;:<>,./? [brackets] <script>alert(""raw event unescaped!"")</script> 2017-12-06T11:23:03.744000 POSITION 2 lang=Armenian sample=""Կրնամ ապակի ուտել և ինծի անհանգիստ չըներ։"" constant=""double quotes"" 'single quotes' \slashes\ `~!@#$%^&*()-_=+{}|;:<>,./? [brackets] <script>alert(""raw event unescaped!"")</script> 2017-12-06T11:06:03.744000 POSITION 3 lang=Chinese sample="" 我能吞下玻璃而不傷身體"" odd=3 constant=""double quotes"" 'single quotes' \slashes\ `~!@#$%^&*()-_=+{}|;:<>,./? [brackets] <script>alert(""raw event unescaped!"")</script> 2017-12-06T10:49:03.744000 POSITION 4 lang=Danish sample=""Jeg kan spise glas, det gør ikke ondt på mig."" constant=""double quotes"" 'single quotes' \slashes\ `~!@#$%^&*()-_=+{}|;:<>,./? [brackets] <script>alert(""raw event unescaped!"")</script> 2017-12-06T10:32:03.744000 POSITION 5 lang=Euro sample=""€."" odd=5 constant=""double quotes"" 'single quotes' \slashes\ `~!@#$%^&*()-_=+{}|;:<>,./? [brackets] <script>alert(""raw event unescaped!"")</script> 2017-12-06T10:15:03.744000 POSITION 6 lang=French sample=""Je peux manger du verre, ça ne me fait pas de mal."" constant=""double quotes"" 'single quotes' \slashes\ `~!@#$%^&*()-_=+{}|;:<>,./? [brackets] <script>alert(""raw event unescaped!"")</script> 2017-12-06T09:58:03.744000 POSITION 7 lang=Georgian sample=""მინას ვჭამ და არა მტკივა."" odd=7 constant=""double quotes"" 'single quotes' \slashes\ `~!@#$%^&*()-_=+{}|;:<>,./? [brackets] <script>alert(""raw event unescaped!"")</script> 2017-12-06T09:41:03.744000 POSITION 8 lang=Greek sample=""Μπορώ να φάω σπασμένα γυαλιά χωρίς να πάθω τίποτα."" constant=""double quotes"" 'single quotes' \slashes\ `~!@#$%^&*()-_=+{}|;:<>,./? [brackets] <script>alert(""raw event unescaped!"")</script> 2017-12-06T09:24:03.744000 POSITION 9 lang=Hawaiian sample=""Hiki iaʻu ke ʻai i ke aniani; ʻaʻole nō lā au e ʻeha."" odd=9 constant=""double quotes"" 'single quotes' \slashes\ `~!@#$%^&*()-_=+{}|;:<>,./? [brackets] <script>alert(""raw event unescaped!"")</script> 2017-12-06T09:07:03.744000 POSITION 10 lang=Hebrew sample=""אני יכול לאכול זכוכית וזה לא מזיק לי."" constant=""double quotes"" 'single quotes' \slashes\ `~!@#$%^&*()-_=+{}|;:<>,./? [brackets] <script>alert(""raw event unescaped!"")</script> 2017-12-06T08:50:03.744000 POSITION 11 lang=Hindi sample=""मैं काँच खा सकता हूँ और मुझे उससे कोई चोट नहीं पहुंचती."" odd=11 constant=""double quotes"" 'single quotes' \slashes\ `~!@#$%^&*()-_=+{}|;:<>,./? [brackets] <script>alert(""raw event unescaped!"")</script> 2017-12-06T08:33:03.744000 POSITION 12 lang=Hindi sample=""मैं काँच खा सकता हूँ, मुझे उस से कोई पीडा नहीं होती."" constant=""double quotes"" 'single quotes' \slashes\ `~!@#$%^&*()-_=+{}|;:<>,./? [brackets] <script>alert(""raw event unescaped!"")</script> 2017-12-06T08:16:03.744000 POSITION 13 lang=Icelandic sample=""Ég get etið gler án þess að meiða mig."" odd=13 constant=""double quotes"" 'single quotes' \slashes\ `~!@#$%^&*()-_=+{}|;:<>,./? [brackets] <script>alert(""raw event unescaped!"")</script> 2017-12-06T07:59:03.744000 POSITION 14 lang=Japanese sample=""私はガラスを食べられます。それは私を傷つけません"" constant=""double quotes"" 'single quotes' \slashes\ `~!@#$%^&*()-_=+{}|;:<>,./? [brackets] <script>alert(""raw event unescaped!"")</script> 2017-12-06T07:42:03.744000 POSITION 15 lang=Korean sample=""나는 유리를 먹을 수 있어요. 그래도 아프지 않아요"" odd=15 constant=""double quotes"" 'single quotes' \slashes\ `~!@#$%^&*()-_=+{}|;:<>,./? [brackets] <script>alert(""raw event unescaped!"")</script> 2017-12-06T07:25:03.744000 POSITION 16 lang=Macedonian sample=""Можам да јадам стакло, а не ме штета."" constant=""double quotes"" 'single quotes' \slashes\ `~!@#$%^&*()-_=+{}|;:<>,./? [brackets] <script>alert(""raw event unescaped!"")</script> 2017-12-06T07:08:03.744000 POSITION 17 lang=Mongolian sample=""Би шил идэй чадна, надад хортой биш"" odd=17 constant=""double quotes"" 'single quotes' \slashes\ `~!@#$%^&*()-_=+{}|;:<>,./? [brackets] <script>alert(""raw event unescaped!"")</script> 2017-12-06T06:51:03.744000 POSITION 18 lang=Old Norse sample=""Ek get etið gler án þess að verða sár."" constant=""double quotes"" 'single quotes' \slashes\ `~!@#$%^&*()-_=+{}|;:<>,./? [brackets] <script>alert(""raw event unescaped!"")</script> 2017-12-06T06:34:03.744000 POSITION 19 lang=Polish sample=""Mogę jeść szkło, i mi nie szkodzi."" odd=19 constant=""double quotes"" 'single quotes' \slashes\ `~!@#$%^&*()-_=+{}|;:<>,./? [brackets] <script>alert(""raw event unescaped!"")</script>"; 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