StringInfo.ParseCombiningCharacters(String) StringInfo.ParseCombiningCharacters(String) StringInfo.ParseCombiningCharacters(String) StringInfo.ParseCombiningCharacters(String) Method

Definição

Retorna os índices de cada caractere base, substituto alto ou caractere de controle dentro da cadeia de caracteres especificada.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()

Parâmetros

str
String String String String

A cadeia de caracteres a ser pesquisada.The string to search.

Retornos

Int32[]

Uma matriz de inteiros que contém os índices com base em zero de cada caractere base, o substituto alto ou o caractere de controle dentro de cadeia de caracteres especificada.An array of integers that contains the zero-based indexes of each base character, high surrogate, or control character within the specified string.

Exceções

Exemplos

O exemplo a seguir demonstra a chamada a ParseCombiningCharacters método.The following example demonstrates calling the ParseCombiningCharacters method. Este exemplo de código é parte de um exemplo maior fornecido para o StringInfo classe.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

Comentários

O padrão Unicode define um par substituto como uma representação de caracteres codificado para um único caractere abstrato que consiste em uma sequência de duas unidades de código, em que a primeira unidade do par é um substituto alto e o segundo é uma baixa substituto.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. Um substituto alto é um ponto de código Unicode no intervalo de U+D800 a U + DBFF e um substituto baixo é um ponto de código Unicode no intervalo U+DC00 a 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.

Um caractere de controle é um caractere para o qual o valor Unicode U + 007F ou no intervalo de u+0000 a U + 001F ou u+0080 a 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.

O .NET define um elemento de texto como uma unidade de texto que é exibido como um único caractere, ou seja, um grafemas..NET defines a text element as a unit of text that is displayed as a single character, that is, a grapheme. Um elemento de texto pode ser um caractere base, um par substituto ou um caractere de combinação sequência.A text element can be a base character, a surrogate pair, or a combining character sequence. O padrão Unicode define uma combinação sequência como uma combinação de um caractere base e um ou mais caracteres de combinação de caracteres.The Unicode Standard defines a combining character sequence as a combination of a base character and one or more combining characters. Um par substituto pode representar um caractere base ou um caractere de combinação.A surrogate pair can represent a base character or a combining character.

Se uma combinação sequência de caracteres for inválida, todos os caracteres combináveis na sequência também é retornado.If a combining character sequence is invalid, every combining character in that sequence is also returned.

Cada índice na matriz resultante é o início de um elemento de texto, ou seja, o índice do caractere base ou o substituto alto.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.

O comprimento de cada elemento facilmente é calculado como a diferença entre índices sucessivas.The length of each element is easily computed as the difference between successive indexes. O comprimento da matriz sempre será menor ou igual ao comprimento da cadeia de caracteres.The length of the array will always be less than or equal to the length of the string. Por exemplo, dada a cadeia de caracteres "\u4f00\u302a\ud800\udc00\u4f01", esse método retorna os índices de 0, 2 e 4.For example, given the string "\u4f00\u302a\ud800\udc00\u4f01", this method returns the indexes 0, 2, and 4.

Membros equivalentesEquivalent Members

Começando na versão 2.0 do .NET Framework, o SubstringByTextElements método e LengthInTextElements propriedade fornecer uma implementação mais fácil de usar a funcionalidade oferecida pelo ParseCombiningCharacters método.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.

Aplica-se a

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