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|(?:(?!\1)).)*)(\1)|(?<OpenMatch>({))|(?<CloseMatch>(}))"; string input = @"if (!(new[] { ""Command"", ""Click"" }).Any(d => xmlAttribute.Name.Equals(d, StringComparison.CurrentCultureIgnoreCase))) continue; if (!baseChain.Name.Contains(':')) return chain; var checkAnyInherited = baseChain.Name.Split(':').Last().Split(',', ' ').Where(d => !string.IsNullOrEmpty(d)).Select(d => d.Trim()).ToList(); private static IEnumerable<StatementReferenceMaster> GetAllMethodsForClass(string className, int projectId) { using (ICodeVortoService codeVortoService = new CodeVortoService()) { object[] parametersExp = { new MySqlParameter(""@delim"", MySqlDbType.VarChar) {Value = "",""}, new MySqlParameter(""@className"", MySqlDbType.VarChar) {Value = className}, new MySqlParameter(""@prjId"", MySqlDbType.Int32) {Value = projectId} }; var callExtExpandedCode = codeVortoService.StatementReferenceMasterRepository .ExecuteStoreProcedure<StatementReferenceMaster>(""SpGetAllMethodsForClass"", parametersExp) .ContinueWith(t => t.Result).Result; return callExtExpandedCode; } } @""CREATE\s+TABLE"" @""\`(.*?)\`\s+\("" @""^\`(.*?)\`(.*)"" @""^PRIMARY\s+KEY"" @""(.*)\((.*)\)"" "" "" "" ""("" ""-"" ""DbScript"" @""CREATE\s+TABLE\s+(\[dbo\].)?(\[)?(\`)?(?<TableName>[a-zA-Z0-9_$]+)(\])?(\`)?"" @""^([\s]+)?(\[|\`)?(?<FieldName>[a-zA-Z0-9_$]+)(\]|\`)?"" ""TableName"" @""C:\inetpub\wwwroot\flokapture\ExtractedProjects\LocationServicesSource\Pods.Integration.Services.Location.Model\LocationServiceModel.edmx"" @""^<EntityContainer\s+Name=\""([^\""]*)\"""" @""^<EntityType\s+Name=\""([^\""]*)\"""" @""StoreEntitySet=\""([^\""]*)\"""" @""^<Property\s+"" @""^<EntityType\s+Name=\""([^\""]*)\""|^<Property\s+|^</EntityType>\s+"" ""<edmx:Mappings>"" ""</EntityType>"" ""Done"" ""SELECT * FROM EntityAttributes WHERE ProjectId = "" "" Group by EntityName;"" @""(?<VariableName>[a-z_]+)\s*=\s*new\s+[a-z.0-9]+?"" ""\\(\\)|[\\s]*[\\w]+\\s+(?<VariableName>[a-zA-Z0-9$_]+)[\\s]*=[\\s]*"" ""."" "; 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