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

定義

指定した文字列の各基本文字、上位サロゲート、または制御文字のインデックスを返します。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()

パラメーター

str
String String String String

検索対象の文字列。The string to search.

戻り値

Int32[]

指定した文字列の各基本文字、上位サロゲート、または制御文字の、0 から始まるインデックス番号を格納している整数の配列。An array of integers that contains the zero-based indexes of each base character, high surrogate, or control character within the specified string.

例外

次の例では、ParseCombiningCharacters メソッドを呼び出す方法を示しています。The following example demonstrates calling the ParseCombiningCharacters method. このコード例は、 StringInfoクラスに対して提供される大規模な例の一部です。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

注釈

Unicode 規格では、2つのコード単位のシーケンスで構成される単一の抽象文字のコード化された文字表現としてサロゲートペアを定義します。ペアの最初の単位は上位サロゲート、2番目は下位サロゲートです。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. 上位サロゲートは、u + D800 から U + DBFF の範囲の Unicode コードポイントであり、下位サロゲートは u + DC00 から U + DFFF の範囲の Unicode コードポイントです。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.

制御文字は、Unicode 値が U + 007F、または u + 0000 から U + 001F または U + 0080 から U + 009F までの範囲内にある文字です。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 では、テキスト要素を1つの文字 (書記素) として表示されるテキストの単位として定義します。.NET defines a text element as a unit of text that is displayed as a single character, that is, a grapheme. テキスト要素には、基本文字、サロゲートペア、または組み合わせ文字シーケンスを指定できます。A text element can be a base character, a surrogate pair, or a combining character sequence. Unicode 規格では、基本文字と1つ以上の組み合わせ文字の組み合わせとして、組み合わせ文字シーケンスを定義します。The Unicode Standard defines a combining character sequence as a combination of a base character and one or more combining characters. サロゲートペアは、基本文字または組み合わせ文字を表すことができます。A surrogate pair can represent a base character or a combining character.

結合文字シーケンスが無効な場合は、そのシーケンス内のすべての結合文字も返されます。If a combining character sequence is invalid, every combining character in that sequence is also returned.

結果として得られる配列内の各インデックスは、テキスト要素の先頭、つまり基本文字または上位サロゲートのインデックスです。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.

各要素の長さは、連続したインデックスの差として簡単に計算できます。The length of each element is easily computed as the difference between successive indexes. 配列の長さは、常に文字列の長さ以下になります。The length of the array will always be less than or equal to the length of the string. たとえば、文字列 "\u4f00\u302a\ud800\udc00\u4f01" が指定されている場合、このメソッドはインデックス0、2、および4を返します。For example, given the string "\u4f00\u302a\ud800\udc00\u4f01", this method returns the indexes 0, 2, and 4.

同等のメンバーEquivalent Members

.NET Framework SubstringByTextElementsのバージョン2.0 以降では、メソッドとLengthInTextElementsプロパティによって、 ParseCombiningCharactersメソッドによって提供される機能の使いやすい実装が提供されます。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.

適用対象

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