RegexOptions Enumeración

Definición

public enum class RegexOptions

[System.Flags]
public enum RegexOptions

[<System.Flags>]
type RegexOptions = 

Public Enum RegexOptions

Herencia

Object

ValueType

Enum

RegexOptions

Atributos

FlagsAttribute

Campos

Ejemplos

En el ejemplo siguiente se definen dos expresiones regulares que identifican palabras repetidas en el texto, pero que se crean instancias mediante valores diferentes RegexOptions . La primera expresión regular no distingue mayúsculas de minúsculas; El caso se omite al determinar si una palabra es idéntica a la palabra anterior. La segunda expresión regular distingue mayúsculas de minúsculas; una palabra debe coincidir exactamente con el caso de la palabra anterior para considerarse duplicado.

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

Comentarios

Se RegexOptions puede proporcionar un valor como parámetro a los siguientes miembros de la Regex clase :

• Constructor de Regex.Regex(String, RegexOptions) clase.

• El método Regex.Split(String, String, RegexOptions) .

• El método Regex.IsMatch(String, String, RegexOptions) .

• El método Regex.Match(String, String, RegexOptions) .

• El método Regex.Matches(String, String, RegexOptions) .

• Los métodos Regex.Replace(String, String, String, RegexOptions) y Regex.Replace(String, String, MatchEvaluator, RegexOptions).

También RegexOptions se puede proporcionar un valor como parámetro al RegexCompilationInfo constructor, o bien se puede asignar directamente a la RegexCompilationInfo.Options propiedad . A continuación, el objeto resultante RegexCompilationInfo se usa en la llamada al Regex.CompileToAssembly método .

En su lugar, se pueden proporcionar varias opciones proporcionadas por los miembros de la RegexOptions enumeración (en particular, por sus ExplicitCapturemiembros , IgnoreCaseMultiline, y Singleline ) mediante un carácter de opción insertado en el patrón de expresión regular. Para obtener más información, consulte Opciones de expresiones regulares.

Se aplica a

Consulte también

• Options
• Opciones de expresiones regulares