RegexOptions Výčet

Definice

public enum class RegexOptions

[System.Flags]
public enum RegexOptions

[<System.Flags>]
type RegexOptions = 

Public Enum RegexOptions

Dědičnost

Object

ValueType

Enum

RegexOptions

Atributy

FlagsAttribute

Pole

Příklady

Následující příklad definuje dva regulární výrazy, které identifikují opakovaná slova v textu, ale která jsou vytvořena pomocí různých RegexOptions hodnot. První regulární výraz nerozlišuje velká a malá písmena; při určování, zda je slovo shodné s předchozím slovem, se ignoruje. Druhý regulární výraz rozlišuje velká a malá písmena; slovo musí přesně odpovídat písmenu předcházejícího slova, aby bylo považováno za duplikát.

using System;
using System.Text.RegularExpressions;

public class Test
{
    public static void Main ()
    {
        // Define a case-insensitive regular expression for repeated words.
        Regex rxInsensitive = new Regex(@"\b(?<word>\w+)\s+(\k<word>)\b",
          RegexOptions.Compiled | RegexOptions.IgnoreCase);
        // Define a case-sensitive regular expression for repeated words.
        Regex rxSensitive = new Regex(@"\b(?<word>\w+)\s+(\k<word>)\b",
          RegexOptions.Compiled);

        // Define a test string.        
        string text = "The the quick brown fox  fox jumps over the lazy dog dog.";
        
        // Find matches using case-insensitive regular expression.
        MatchCollection matches = rxInsensitive.Matches(text);

        // Report the number of matches found.
        Console.WriteLine("{0} matches found in:\n   {1}", 
                          matches.Count, 
                          text);

        // Report on each match.
        foreach (Match match in matches)
        {
            GroupCollection groups = match.Groups;
            Console.WriteLine("'{0}' repeated at positions {1} and {2}",  
                              groups["word"].Value, 
                              groups[0].Index, 
                              groups[1].Index);
        }
        Console.WriteLine();
        
        // Find matches using case-sensitive regular expression.
        matches = rxSensitive.Matches(text);

        // Report the number of matches found.
        Console.WriteLine("{0} matches found in:\n   {1}", 
                          matches.Count, 
                          text);

        // Report on each match.
        foreach (Match match in matches)
        {
            GroupCollection groups = match.Groups;
            Console.WriteLine("'{0}' repeated at positions {1} and {2}",  
                              groups["word"].Value, 
                              groups[0].Index, 
                              groups[1].Index);
        }
    }
}
// The example produces the following output to the console:
//       3 matches found in:
//          The the quick brown fox  fox jumps over the lazy dog dog.
//       'The' repeated at positions 0 and 4
//       'fox' repeated at positions 20 and 25
//       'dog' repeated at positions 50 and 54
//       
//       2 matches found in:
//          The the quick brown fox  fox jumps over the lazy dog dog.
//       'fox' repeated at positions 20 and 25
//       'dog' repeated at positions 50 and 54

Imports System.Text.RegularExpressions

Public Module Test

    Public Sub Main()
        ' Define a case-insensitive regular expression for repeated words.
        Dim rxInsensitive As New Regex("\b(?<word>\w+)\s+(\k<word>)\b", _
               RegexOptions.Compiled Or RegexOptions.IgnoreCase)
        ' Define a case-sensitive regular expression for repeated words.
        Dim rxSensitive As New Regex("\b(?<word>\w+)\s+(\k<word>)\b", _
               RegexOptions.Compiled)

        ' Define a test string.        
        Dim text As String = "The the quick brown fox  fox jumps over the lazy dog dog."
        
        ' Find matches using case-insensitive regular expression.
        Dim matches As MatchCollection = rxInsensitive.Matches(text)

        ' Report the number of matches found.
        Console.WriteLine("{0} matches found in:", matches.Count)
        Console.WriteLine("   {0}", text)

        ' Report on each match.
        For Each match As Match In matches
            Dim groups As GroupCollection = match.Groups
            Console.WriteLine("'{0}' repeated at positions {1} and {2}", _ 
                              groups.Item("word").Value, _
                              groups.Item(0).Index, _
                              groups.Item(1).Index)
        Next
        Console.WriteLine()
        
        ' Find matches using case-sensitive regular expression.
        matches = rxSensitive.Matches(text)

        ' Report the number of matches found.
        Console.WriteLine("{0} matches found in:", matches.Count)
        Console.WriteLine("   {0}", text)

        ' Report on each match.
        For Each match As Match In matches
            Dim groups As GroupCollection = match.Groups
            Console.WriteLine("'{0}' repeated at positions {1} and {2}", _ 
                              groups.Item("word").Value, _
                              groups.Item(0).Index, _
                              groups.Item(1).Index)
        Next
        Console.WriteLine()
    End Sub
End Module
' The example produces the following output to the console:
'       3 matches found in:
'          The the quick brown fox  fox jumps over the lazy dog dog.
'       'The' repeated at positions 0 and 4
'       'fox' repeated at positions 20 and 25
'       'dog' repeated at positions 50 and 54
'       
'       2 matches found in:
'          The the quick brown fox  fox jumps over the lazy dog dog.
'       'fox' repeated at positions 20 and 25
'       'dog' repeated at positions 50 and 54

Poznámky

Hodnotu RegexOptions lze poskytnout jako parametr následujícím členům Regex třídy:

• Konstruktor Regex.Regex(String, RegexOptions) třídy.

• Metoda Regex.Split(String, String, RegexOptions) .

• Metoda Regex.IsMatch(String, String, RegexOptions) .

• Metoda Regex.Match(String, String, RegexOptions) .

• Metoda Regex.Matches(String, String, RegexOptions) .

• Metody Regex.Replace(String, String, String, RegexOptions) a Regex.Replace(String, String, MatchEvaluator, RegexOptions) .

Hodnotu RegexOptions lze také zadat jako parametr konstruktoru RegexCompilationInfo nebo ji lze přiřadit přímo vlastnosti RegexCompilationInfo.Options . Výsledný RegexCompilationInfo objekt se pak použije ve volání Regex.CompileToAssembly metody.

Několik možností poskytovaných členy výčtu RegexOptions (zejména jeho ExplicitCapturečleny , IgnoreCaseMultiline, aSingleline) lze místo toho poskytnout pomocí znaku vložené možnosti ve vzoru regulárního výrazu. Podrobnosti najdete v tématu Možnosti regulárního výrazu.

Platí pro

Viz také

• Options
• Možnosti regulárního výrazu