StringInfo.ParseCombiningCharacters(String) Metoda

Definicja

Zwraca indeksy każdego znaku podstawowego, wieloskładnikowego lub znaku kontrolnego w określonym ciągu.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()

Parametry

str
String

Ciąg do wyszukania.The string to search.

Zwraca

Int32[]

Tablica liczb całkowitych, która zawiera indeksy oparte na zerach dla każdego znaku podstawowego, dużego surogatu lub znaku kontrolnego w określonym ciągu.An array of integers that contains the zero-based indexes of each base character, high surrogate, or control character within the specified string.

Wyjątki

str to null.str is null.

Przykłady

Poniższy przykład demonstruje wywołanie ParseCombiningCharacters metody.The following example demonstrates calling the ParseCombiningCharacters method. Ten przykład kodu jest częścią większego przykładu dostarczonego dla StringInfo klasy.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 'ā̈'
// Character at index 3 is 'b'
// Character at index 4 is 'ç'
//
// 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 'ā̈'
'       Character at index 3 is 'b'
'       Character at index 4 is 'ç'
'       
'       Result of ParseCombiningCharacters:
'       Character 0 starts at index 0
'       Character 1 starts at index 3
'       Character 2 starts at index 4

Uwagi

Standard Unicode definiuje parę zastępczą jako reprezentację kodowanego znaku dla pojedynczego znaku abstrakcyjnego, który składa się z sekwencji dwóch jednostek kodu, gdzie pierwsza jednostka pary jest górnym surogatem, a drugi jest dolnym surogatem.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. Duży Surogat jest punktem kodu Unicode w zakresie U + D800 za pomocą U + DBFF, a dolny Surogat jest punktem kodu Unicode w zakresie U + DC00 za pomocą 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.

Znak kontrolny jest znakiem, dla którego wartość Unicode jest U + 007F lub z zakresu U + 0000 do U + 001F lub U + 0080 za pomocą 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.

Platforma .NET definiuje element tekstowy jako jednostkę tekstu wyświetlaną jako pojedynczy znak, czyli Grapheme..NET defines a text element as a unit of text that is displayed as a single character, that is, a grapheme. Element tekstowy może być znakiem podstawowym, parą zastępczą lub kombinacją sekwencji znaków.A text element can be a base character, a surrogate pair, or a combining character sequence. Standard Unicode definiuje Łączenie sekwencji znaków jako kombinację znaku podstawowego i jednego lub więcej łączących się znaków.The Unicode Standard defines a combining character sequence as a combination of a base character and one or more combining characters. Para dwuskładnikowa może reprezentować znak podstawowy lub łączący znak.A surrogate pair can represent a base character or a combining character.

Jeśli ciąg łączący znak jest nieprawidłowy, zwracany jest również każdy łączący znak w tej sekwencji.If a combining character sequence is invalid, every combining character in that sequence is also returned.

Każdy indeks w wyniku tablicy jest początkiem elementu tekstowego, czyli indeksem znaku podstawowego lub dużego surogatu.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.

Długość każdego elementu jest łatwo obliczana jako różnica między kolejnymi indeksami.The length of each element is easily computed as the difference between successive indexes. Długość tablicy będzie zawsze mniejsza lub równa długości ciągu.The length of the array will always be less than or equal to the length of the string. Na przykład, uwzględniając ciąg "\u4f00\u302a\ud800\udc00\u4f01", Metoda ta zwraca indeksy 0, 2 i 4.For example, given the string "\u4f00\u302a\ud800\udc00\u4f01", this method returns the indexes 0, 2, and 4.

Równoważne elementy członkowskieEquivalent Members

Począwszy od wersji 2,0 .NET Framework, SubstringByTextElements Metoda i LengthInTextElements Właściwość zapewniają łatwą w użyciu implementację funkcji oferowanych przez ParseCombiningCharacters metodę.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.

Dotyczy

Zobacz też