StringInfo.ParseCombiningCharacters(String) Méthode

Définition

Retourne les index de tous les caractères de base, substituts étendus ou caractères de contrôle dans la chaîne spécifiée.Returns the indexes of each base character, high surrogate, or control character within the specified string.

public:
 static cli::array <int> ^ ParseCombiningCharacters(System::String ^ str);
public static int[] ParseCombiningCharacters (string str);
static member ParseCombiningCharacters : string -> int[]
Public Shared Function ParseCombiningCharacters (str As String) As Integer()

Paramètres

str
String

Chaîne à rechercher.The string to search.

Retours

Int32[]

Tableau d'entiers qui contient les index de base zéro de tous les caractères de base, substituts étendus ou caractères de contrôle dans la chaîne spécifiée.An array of integers that contains the zero-based indexes of each base character, high surrogate, or control character within the specified string.

Exceptions

str a la valeur null.str is null.

Exemples

L'exemple suivant montre l'appel à la méthode ParseCombiningCharacters.The following example demonstrates calling the ParseCombiningCharacters method. Cet exemple de code fait partie d’un exemple plus complet fourni pour la classe StringInfo.This code example is part of a larger example provided for the StringInfo class.

using namespace System;
using namespace System::Text;
using namespace System::Globalization;


// Show how to enumerate each real character (honoring surrogates)
// in a string.

void EnumTextElements(String^ combiningChars)
{
    // This StringBuilder holds the output results.
    StringBuilder^ sb = gcnew StringBuilder();

    // Use the enumerator returned from GetTextElementEnumerator
    // method to examine each real character.
    TextElementEnumerator^ charEnum =
        StringInfo::GetTextElementEnumerator(combiningChars);
    while (charEnum->MoveNext())
    {
        sb->AppendFormat("Character at index {0} is '{1}'{2}", 
            charEnum->ElementIndex, charEnum->GetTextElement(), 
            Environment::NewLine);
    }

    // Show the results.
    Console::WriteLine("Result of GetTextElementEnumerator:");
    Console::WriteLine(sb);
}


// Show how to discover the index of each real character
// (honoring surrogates) in a string.

void EnumTextElementIndexes(String^ combiningChars)
{
    // This StringBuilder holds the output results.
    StringBuilder^ sb = gcnew StringBuilder();

    // Use the ParseCombiningCharacters method to
    // get the index of each real character in the string.
    array <int>^ textElemIndex =
        StringInfo::ParseCombiningCharacters(combiningChars);

    // Iterate through each real character showing the character
    // and the index where it was found.
    for (int i = 0; i < textElemIndex->Length; i++)
    {
        sb->AppendFormat("Character {0} starts at index {1}{2}",
            i, textElemIndex[i], Environment::NewLine);
    }

    // Show the results.
    Console::WriteLine("Result of ParseCombiningCharacters:");
    Console::WriteLine(sb);
}

int main()
{

    // The string below contains combining characters.
    String^ combiningChars = L"a\u0304\u0308bc\u0327";

    // Show each 'character' in the string.
    EnumTextElements(combiningChars);

    // Show the index in the string where each 'character' starts.
    EnumTextElementIndexes(combiningChars);

};

// This code produces the following output.
//
// Result of GetTextElementEnumerator:
// Character at index 0 is 'a-"'
// Character at index 3 is 'b'
// Character at index 4 is 'c,'
//
// Result of ParseCombiningCharacters:
// Character 0 starts at index 0
// Character 1 starts at index 3
// Character 2 starts at index 4
using System;
using System.Text;
using System.Globalization;

public sealed class App {
   static void Main() {
      // The string below contains combining characters.
      String s = "a\u0304\u0308bc\u0327";

      // Show each 'character' in the string.
      EnumTextElements(s);

      // Show the index in the string where each 'character' starts.
      EnumTextElementIndexes(s);
   }

   // Show how to enumerate each real character (honoring surrogates) in a string.
   static void EnumTextElements(String s) {
      // This StringBuilder holds the output results.
      StringBuilder sb = new StringBuilder();

      // Use the enumerator returned from GetTextElementEnumerator 
      // method to examine each real character.
      TextElementEnumerator charEnum = StringInfo.GetTextElementEnumerator(s);
      while (charEnum.MoveNext()) {
         sb.AppendFormat(
           "Character at index {0} is '{1}'{2}",
           charEnum.ElementIndex, charEnum.GetTextElement(),
           Environment.NewLine);
      }

      // Show the results.
      Console.WriteLine("Result of GetTextElementEnumerator:");
      Console.WriteLine(sb);
   }

   // Show how to discover the index of each real character (honoring surrogates) in a string.
   static void EnumTextElementIndexes(String s) {
      // This StringBuilder holds the output results.
      StringBuilder sb = new StringBuilder();

      // Use the ParseCombiningCharacters method to 
      // get the index of each real character in the string.
      Int32[] textElemIndex = StringInfo.ParseCombiningCharacters(s);

      // Iterate through each real character showing the character and the index where it was found.
      for (Int32 i = 0; i < textElemIndex.Length; i++) {
         sb.AppendFormat(
            "Character {0} starts at index {1}{2}",
            i, textElemIndex[i], Environment.NewLine);
      }

      // Show the results.
      Console.WriteLine("Result of ParseCombiningCharacters:");
      Console.WriteLine(sb);
   }
}

// This code produces the following output.
//
// Result of GetTextElementEnumerator:
// Character at index 0 is 'a-"'
// Character at index 3 is 'b'
// Character at index 4 is 'c,'
// 
// Result of ParseCombiningCharacters:
// Character 0 starts at index 0
// Character 1 starts at index 3
// Character 2 starts at index 4
Imports System.Text
Imports System.Globalization

Public Module Example
   Public Sub Main()
      ' The string below contains combining characters.
      Dim s As String = "a" + ChrW(&h0304) + ChrW(&h0308) + "bc" + ChrW(&h0327)

      ' Show each 'character' in the string.
      EnumTextElements(s)

      ' Show the index in the string where each 'character' starts.
      EnumTextElementIndexes(s)
   End Sub

   ' Show how to enumerate each real character (honoring surrogates) in a string.
   Sub EnumTextElements(s As String)
      ' This StringBuilder holds the output results.
      Dim sb As New StringBuilder()

      ' Use the enumerator returned from GetTextElementEnumerator 
      ' method to examine each real character.
      Dim charEnum As TextElementEnumerator = StringInfo.GetTextElementEnumerator(s)
      Do While charEnum.MoveNext()
         sb.AppendFormat("Character at index {0} is '{1}'{2}",
                         charEnum.ElementIndex, 
                         charEnum.GetTextElement(),
                         Environment.NewLine)
      Loop

      ' Show the results.
      Console.WriteLine("Result of GetTextElementEnumerator:")
      Console.WriteLine(sb)
   End Sub

   ' Show how to discover the index of each real character (honoring surrogates) in a string.
   Sub EnumTextElementIndexes(s As String)
      ' This StringBuilder holds the output results.
      Dim sb As New StringBuilder()

      ' Use the ParseCombiningCharacters method to 
      ' get the index of each real character in the string.
      Dim textElemIndex() As Integer = StringInfo.ParseCombiningCharacters(s)

      ' Iterate through each real character showing the character and the index where it was found.
      For i As Int32 = 0 To textElemIndex.Length - 1
         sb.AppendFormat("Character {0} starts at index {1}{2}",
                         i, textElemIndex(i), Environment.NewLine)
      Next

      ' Show the results.
      Console.WriteLine("Result of ParseCombiningCharacters:")
      Console.WriteLine(sb)
   End Sub
End Module
' The example displays the following output:
'       Result of GetTextElementEnumerator:
'       Character at index 0 is 'a-"'
'       Character at index 3 is 'b'
'       Character at index 4 is 'c,'
'       
'       Result of ParseCombiningCharacters:
'       Character 0 starts at index 0
'       Character 1 starts at index 3
'       Character 2 starts at index 4

Remarques

La norme Unicode définit une paire de substitution comme une représentation de caractère codé pour un caractère abstrait unique qui se compose d’une séquence de deux unités de code, où la première unité de la paire est un substitut étendu et la seconde est un substitut faible.The Unicode Standard defines a surrogate pair as a coded character representation for a single abstract character that consists of a sequence of two code units, where the first unit of the pair is a high surrogate and the second is a low surrogate. Un substitut étendu est un point de code Unicode dans la plage U + D800 à U + DBFF et un substitut faible est un point de code Unicode dans la plage U + DC00 et à U + DFFF.A high surrogate is a Unicode code point in the range U+D800 through U+DBFF and a low surrogate is a Unicode code point in the range U+DC00 through U+DFFF.

Un caractère de contrôle est un caractère dont la valeur Unicode est U + 007F ou comprise entre U + 0000 et U + 001F ou U + 0080 et U + 009F.A control character is a character for which the Unicode value is U+007F or in the range U+0000 through U+001F or U+0080 through U+009F.

.NET définit un élément de texte comme une unité de texte qui s’affiche sous la forme d’un caractère unique, autrement dit, un graphèmes..NET defines a text element as a unit of text that is displayed as a single character, that is, a grapheme. Un élément de texte peut être un caractère de base, une paire de substitution ou une séquence de caractères d’association.A text element can be a base character, a surrogate pair, or a combining character sequence. La norme Unicode définit une séquence de caractères d’association comme une combinaison d’un caractère de base et d’un ou plusieurs caractères d’association.The Unicode Standard defines a combining character sequence as a combination of a base character and one or more combining characters. Une paire de substitution peut représenter un caractère de base ou un caractère d’association.A surrogate pair can represent a base character or a combining character.

Si une séquence de caractères d’association n’est pas valide, chaque caractère d’association de cette séquence est également retourné.If a combining character sequence is invalid, every combining character in that sequence is also returned.

Chaque index dans le tableau résultant est le début d’un élément de texte, autrement dit, l’index du caractère de base ou le substitut étendu.Each index in the resulting array is the beginning of a text element, that is, the index of the base character or the high surrogate.

La longueur de chaque élément est facilement calculée en fonction de la différence entre les index successifs.The length of each element is easily computed as the difference between successive indexes. La longueur du tableau sera toujours inférieure ou égale à la longueur de la chaîne.The length of the array will always be less than or equal to the length of the string. Par exemple, étant donné la chaîne « \u4f00\u302a\ud800\udc00\u4f01 », cette méthode retourne les index 0, 2 et 4.For example, given the string "\u4f00\u302a\ud800\udc00\u4f01", this method returns the indexes 0, 2, and 4.

Membres équivalentsEquivalent Members

À partir de la version 2,0 de la .NET Framework, la méthode SubstringByTextElements et la propriété LengthInTextElements fournissent une implémentation facile à utiliser des fonctionnalités offertes par la méthode ParseCombiningCharacters.Starting in version 2.0 of the .NET Framework, the SubstringByTextElements method and LengthInTextElements property provide an easy to use implementation of the functionality offered by the ParseCombiningCharacters method.

S’applique à

Voir aussi