String.IsNormalizedとは？ わかりやすく解説

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String.IsNormalized メソッド ()

メモ : このメソッドは、.NET Framework version 2.0 で新しく追加されたものです。

この文字列が、Unicode 正規形 C であるかどうかを示します。

名前空間: System
アセンブリ: mscorlib (mscorlib.dll 内)
構文構文

Visual Basic (宣言)
Public Function IsNormalized As
 Boolean
Visual Basic (使用法)
Dim instance As String
Dim returnValue As Boolean

returnValue = instance.IsNormalized
C#
public bool IsNormalized ()
C++
public:
bool IsNormalized ()
J#
public boolean IsNormalized ()
JScript
public function IsNormalized () : boolean

戻り値
この文字列が正規形 C である場合は true。それ以外の場合は false。

解説解説

一部の Unicode 文字には、組み合わせ文字や複合文字から成る、複数の等価なバイナリ表現が存在します。同じ文字に対して複数の表現方法が存在すると、検索、並べ替え、比較などの処理が複雑になります。

Unicode Standard では、同等のバイナリ表現が与えられたときに、結果的に同じ文字になるのであれば常に単一のバイナリ表現を返す、正規化と呼ばれるプロセスを定義しています。正規化は、それぞれ異なる規則に基づく複数のアルゴリズム (正規化形式) で実行されます。.NET Framework では、現在、C、D、KC、および KD 形式の正規化をサポートしています。

サポートされる Unicode 正規形の詳細については、「System.Text.NormalizationForm」を参照してください。

使用例使用例

文字列が各種の正規形に正しく正規化されたかどうかを判断するコード例を次に示します。

Visual Basic
' This example demonstrates the String.Normalize method
'                       and the String.IsNormalized method
Imports System
Imports System.Text
Imports Microsoft.VisualBasic

Class Sample
   Public Shared Sub Main()
      ' Character c; combining characters acute and cedilla; character
 3/4
      Dim s1 = New [String](New
 Char() {ChrW(&H0063), ChrW(&H0301), ChrW(&H0327),
 ChrW(&H00BE)})
      Dim s2 As String =
 Nothing
      Dim divider = New [String]("-"c,
 80)
      divider = [String].Concat(Environment.NewLine, divider, Environment.NewLine)
      
      Try
         Show("s1", s1)
         Console.WriteLine()
         Console.WriteLine("U+0063 = LATIN SMALL LETTER C")
         Console.WriteLine("U+0301 = COMBINING ACUTE ACCENT")
         Console.WriteLine("U+0327 = COMBINING CEDILLA")
         Console.WriteLine("U+00BE = VULGAR FRACTION THREE QUARTERS")

         Console.WriteLine(divider)
         
         Console.WriteLine("A1) Is s1 normalized to the default
 form (Form C)?: {0}", s1.IsNormalized())
         Console.WriteLine("A2) Is s1 normalized to Form C?: 
 {0}", s1.IsNormalized(NormalizationForm.FormC))
         Console.WriteLine("A3) Is s1 normalized to Form D?: 
 {0}", s1.IsNormalized(NormalizationForm.FormD))
         Console.WriteLine("A4) Is s1 normalized to Form KC?:
 {0}", s1.IsNormalized(NormalizationForm.FormKC))
         Console.WriteLine("A5) Is s1 normalized to Form KD?:
 {0}", s1.IsNormalized(NormalizationForm.FormKD))
         
         Console.WriteLine(divider)
         
         Console.WriteLine("Set string s2 to each normalized form
 of string s1.")
         Console.WriteLine()
         Console.WriteLine("U+1E09 = LATIN SMALL LETTER C WITH
 CEDILLA AND ACUTE")
         Console.WriteLine("U+0033 = DIGIT THREE")
         Console.WriteLine("U+2044 = FRACTION SLASH")
         Console.WriteLine("U+0034 = DIGIT FOUR")
         Console.WriteLine(divider)
         
         s2 = s1.Normalize()
         Console.Write("B1) Is s2 normalized to the default form
 (Form C)?: ")
         Console.WriteLine(s2.IsNormalized())
         Show("s2", s2)
         Console.WriteLine()
         
         s2 = s1.Normalize(NormalizationForm.FormC)
         Console.Write("B2) Is s2 normalized to Form C?: ")
         Console.WriteLine(s2.IsNormalized(NormalizationForm.FormC))
         Show("s2", s2)
         Console.WriteLine()
         
         s2 = s1.Normalize(NormalizationForm.FormD)
         Console.Write("B3) Is s2 normalized to Form D?: ")
         Console.WriteLine(s2.IsNormalized(NormalizationForm.FormD))
         Show("s2", s2)
         Console.WriteLine()
         
         s2 = s1.Normalize(NormalizationForm.FormKC)
         Console.Write("B4) Is s2 normalized to Form KC?: ")
         Console.WriteLine(s2.IsNormalized(NormalizationForm.FormKC))
         Show("s2", s2)
         Console.WriteLine()
         
         s2 = s1.Normalize(NormalizationForm.FormKD)
         Console.Write("B5) Is s2 normalized to Form KD?: ")
         Console.WriteLine(s2.IsNormalized(NormalizationForm.FormKD))
         Show("s2", s2)
         Console.WriteLine()
      
      Catch e As Exception
         Console.WriteLine(e.Message)
      End Try
   End Sub 'Main
   
   Private Shared Sub Show(title
 As String, s As String)
      Console.Write("Characters in string {0} = ",
 title)
      Dim x As Char
      For Each x In  s.ToCharArray()
         Console.Write("{0:X4} ", AscW(x))
      Next x
      Console.WriteLine()
   End Sub 'Show
End Class 'Sample
'
'This example produces the following results:
'
'Characters in string s1 = 0063 0301 0327 00BE
'
'U+0063 = LATIN SMALL LETTER C
'U+0301 = COMBINING ACUTE ACCENT
'U+0327 = COMBINING CEDILLA
'U+00BE = VULGAR FRACTION THREE QUARTERS
'
'--------------------------------------------------------------------------------
'
'A1) Is s1 normalized to the default form (Form C)?: False
'A2) Is s1 normalized to Form C?:  False
'A3) Is s1 normalized to Form D?:  False
'A4) Is s1 normalized to Form KC?: False
'A5) Is s1 normalized to Form KD?: False
'
'--------------------------------------------------------------------------------
'
'Set string s2 to each normalized form of string s1.
'
'U+1E09 = LATIN SMALL LETTER C WITH CEDILLA AND ACUTE
'U+0033 = DIGIT THREE
'U+2044 = FRACTION SLASH
'U+0034 = DIGIT FOUR
'
'--------------------------------------------------------------------------------
'
'B1) Is s2 normalized to the default form (Form C)?: True
'Characters in string s2 = 1E09 00BE
'
'B2) Is s2 normalized to Form C?: True
'Characters in string s2 = 1E09 00BE
'
'B3) Is s2 normalized to Form D?: True
'Characters in string s2 = 0063 0327 0301 00BE
'
'B4) Is s2 normalized to Form KC?: True
'Characters in string s2 = 1E09 0033 2044 0034
'
'B5) Is s2 normalized to Form KD?: True
'Characters in string s2 = 0063 0327 0301 0033 2044 0034
'
C#
// This example demonstrates the String.Normalize method
//                       and the String.IsNormalized method

using System;
using System.Text;

class Sample 
{
    public static void Main()
 
    {
// Character c; combining characters acute and cedilla; character 3/4
    string s1 = new String( new
 char[] {'\u0063', '\u0301', '\u0327', '\u00BE'});
    string s2 = null;
    string divider = new String('-', 80);
    divider = String.Concat(Environment.NewLine, divider, Environment.NewLine);

    try 
    {
    Show("s1", s1);
    Console.WriteLine();
    Console.WriteLine("U+0063 = LATIN SMALL LETTER C");
    Console.WriteLine("U+0301 = COMBINING ACUTE ACCENT");
    Console.WriteLine("U+0327 = COMBINING CEDILLA");
    Console.WriteLine("U+00BE = VULGAR FRACTION THREE QUARTERS");
    Console.WriteLine(divider);

    Console.WriteLine("A1) Is s1 normalized to the default
 form (Form C)?: {0}", 
                                 s1.IsNormalized());
    Console.WriteLine("A2) Is s1 normalized to Form C?:  {0}", 
                                 s1.IsNormalized(NormalizationForm.FormC));
    Console.WriteLine("A3) Is s1 normalized to Form D?:  {0}", 
                                 s1.IsNormalized(NormalizationForm.FormD));
    Console.WriteLine("A4) Is s1 normalized to Form KC?: {0}", 
                                 s1.IsNormalized(NormalizationForm.FormKC));
    Console.WriteLine("A5) Is s1 normalized to Form KD?: {0}", 
                                 s1.IsNormalized(NormalizationForm.FormKD));

    Console.WriteLine(divider);

    Console.WriteLine("Set string s2 to each normalized form
 of string s1.");
    Console.WriteLine();
    Console.WriteLine("U+1E09 = LATIN SMALL LETTER C WITH CEDILLA AND ACUTE");
    Console.WriteLine("U+0033 = DIGIT THREE");
    Console.WriteLine("U+2044 = FRACTION SLASH");
    Console.WriteLine("U+0034 = DIGIT FOUR");
    Console.WriteLine(divider);

    s2 = s1.Normalize();
    Console.Write("B1) Is s2 normalized to the default form
 (Form C)?: ");
    Console.WriteLine(s2.IsNormalized());
    Show("s2", s2);
    Console.WriteLine();

    s2 = s1.Normalize(NormalizationForm.FormC);
    Console.Write("B2) Is s2 normalized to Form C?: ");
    Console.WriteLine(s2.IsNormalized(NormalizationForm.FormC));
    Show("s2", s2);
    Console.WriteLine();

    s2 = s1.Normalize(NormalizationForm.FormD);
    Console.Write("B3) Is s2 normalized to Form D?: ");
    Console.WriteLine(s2.IsNormalized(NormalizationForm.FormD));
    Show("s2", s2);
    Console.WriteLine();

    s2 = s1.Normalize(NormalizationForm.FormKC);
    Console.Write("B4) Is s2 normalized to Form KC?: ");
    Console.WriteLine(s2.IsNormalized(NormalizationForm.FormKC));
    Show("s2", s2);
    Console.WriteLine();

    s2 = s1.Normalize(NormalizationForm.FormKD);
    Console.Write("B5) Is s2 normalized to Form KD?: ");
    Console.WriteLine(s2.IsNormalized(NormalizationForm.FormKD));
    Show("s2", s2);
    Console.WriteLine();
    }

    catch (Exception e) 
        {
        Console.WriteLine(e.Message);
        }
    }

    private static void
 Show(string title, string s)
    {
    Console.Write("Characters in string
 {0} = ", title);
    foreach(short x in s.ToCharArray())
        {
        Console.Write("{0:X4} ", x);
        }
    Console.WriteLine();
    }
}
/*
This example produces the following results:

Characters in string s1 = 0063 0301 0327 00BE

U+0063 = LATIN SMALL LETTER C
U+0301 = COMBINING ACUTE ACCENT
U+0327 = COMBINING CEDILLA
U+00BE = VULGAR FRACTION THREE QUARTERS

--------------------------------------------------------------------------------

A1) Is s1 normalized to the default form (Form C)?: False
A2) Is s1 normalized to Form C?:  False
A3) Is s1 normalized to Form D?:  False
A4) Is s1 normalized to Form KC?: False
A5) Is s1 normalized to Form KD?: False

--------------------------------------------------------------------------------

Set string s2 to each normalized form of string
 s1.

U+1E09 = LATIN SMALL LETTER C WITH CEDILLA AND ACUTE
U+0033 = DIGIT THREE
U+2044 = FRACTION SLASH
U+0034 = DIGIT FOUR

--------------------------------------------------------------------------------

B1) Is s2 normalized to the default form (Form C)?: True
Characters in string s2 = 1E09 00BE

B2) Is s2 normalized to Form C?: True
Characters in string s2 = 1E09 00BE

B3) Is s2 normalized to Form D?: True
Characters in string s2 = 0063 0327 0301 00BE

B4) Is s2 normalized to Form KC?: True
Characters in string s2 = 1E09 0033 2044 0034

B5) Is s2 normalized to Form KD?: True
Characters in string s2 = 0063 0327 0301 0033
 2044 0034

*/
C++
// This example demonstrates the String.Normalize method
//                       and the String.IsNormalized method
using namespace System;
using namespace System::Text;
void Show( String^ title, String^ s )
{
   Console::Write( "Characters in string
 {0} = ", title );
   System::Collections::IEnumerator^ myEnum = s->ToCharArray()->GetEnumerator();
   while ( myEnum->MoveNext() )
   {
      
      /*) * __try_cast < Char * > ( myEnum -> Current );*/
      int x;
      Console::Write( "{0:X4} ", x );
   }

   Console::WriteLine();
}

int main()
{
   
   // Character c; combining characters acute and cedilla; character
 3/4
   array<Char>^temp0 = {L'c',L'\u0301',L'\u0327',L'\u00BE'};
   String^ s1 = gcnew String( temp0 );
   String^ s2 = nullptr;
   String^ divider = gcnew String( '-',80 );
   divider = String::Concat( Environment::NewLine, divider, Environment::NewLine
 );
   try
   {
      Show( "s1", s1 );
      Console::WriteLine();
      Console::WriteLine( "U+0063 = LATIN SMALL LETTER C" );
      Console::WriteLine( "U+0301 = COMBINING ACUTE ACCENT" );
      Console::WriteLine( "U+0327 = COMBINING CEDILLA" );
      Console::WriteLine( "U+00BE = VULGAR FRACTION THREE QUARTERS" );
      Console::WriteLine( divider );
      Console::WriteLine( "A1) Is s1 normalized to the default
 form (Form C)?: {0}", s1->IsNormalized() );
      Console::WriteLine( "A2) Is s1 normalized to Form C?:  {0}", s1->IsNormalized(
 NormalizationForm::FormC ) );
      Console::WriteLine( "A3) Is s1 normalized to Form D?:  {0}", s1->IsNormalized(
 NormalizationForm::FormD ) );
      Console::WriteLine( "A4) Is s1 normalized to Form KC?: {0}", s1->IsNormalized(
 NormalizationForm::FormKC ) );
      Console::WriteLine( "A5) Is s1 normalized to Form KD?: {0}", s1->IsNormalized(
 NormalizationForm::FormKD ) );
      Console::WriteLine( divider );
      Console::WriteLine( "Set string s2 to each normalized form of string
 s1." );
      Console::WriteLine();
      Console::WriteLine( "U+1E09 = LATIN SMALL LETTER C WITH CEDILLA AND ACUTE"
 );
      Console::WriteLine( "U+0033 = DIGIT THREE" );
      Console::WriteLine( "U+2044 = FRACTION SLASH" );
      Console::WriteLine( "U+0034 = DIGIT FOUR" );
      Console::WriteLine( divider );
      s2 = s1->Normalize();
      Console::Write( "B1) Is s2 normalized to the default
 form (Form C)?: " );
      Console::WriteLine( s2->IsNormalized() );
      Show( "s2", s2 );
      Console::WriteLine();
      s2 = s1->Normalize( NormalizationForm::FormC );
      Console::Write( "B2) Is s2 normalized to Form C?: " );
      Console::WriteLine( s2->IsNormalized( NormalizationForm::FormC ) );
      Show( "s2", s2 );
      Console::WriteLine();
      s2 = s1->Normalize( NormalizationForm::FormD );
      Console::Write( "B3) Is s2 normalized to Form D?: " );
      Console::WriteLine( s2->IsNormalized( NormalizationForm::FormD ) );
      Show( "s2", s2 );
      Console::WriteLine();
      s2 = s1->Normalize( NormalizationForm::FormKC );
      Console::Write( "B4) Is s2 normalized to Form KC?: " );
      Console::WriteLine( s2->IsNormalized( NormalizationForm::FormKC ) );
      Show( "s2", s2 );
      Console::WriteLine();
      s2 = s1->Normalize( NormalizationForm::FormKD );
      Console::Write( "B5) Is s2 normalized to Form KD?: " );
      Console::WriteLine( s2->IsNormalized( NormalizationForm::FormKD ) );
      Show( "s2", s2 );
      Console::WriteLine();
   }
   catch ( Exception^ e ) 
   {
      Console::WriteLine( e->Message );
   }

}

/*
This example produces the following results:

Characters in string s1 = 0063 0301 0327 00BE

U+0063 = LATIN SMALL LETTER C
U+0301 = COMBINING ACUTE ACCENT
U+0327 = COMBINING CEDILLA
U+00BE = VULGAR FRACTION THREE QUARTERS

--------------------------------------------------------------------------------

A1) Is s1 normalized to the default form (Form C)?: False
A2) Is s1 normalized to Form C?:  False
A3) Is s1 normalized to Form D?:  False
A4) Is s1 normalized to Form KC?: False
A5) Is s1 normalized to Form KD?: False

--------------------------------------------------------------------------------

Set string s2 to each normalized form of string
 s1.

U+1E09 = LATIN SMALL LETTER C WITH CEDILLA AND ACUTE
U+0033 = DIGIT THREE
U+2044 = FRACTION SLASH
U+0034 = DIGIT FOUR

--------------------------------------------------------------------------------

B1) Is s2 normalized to the default form (Form C)?: True
Characters in string s2 = 1E09 00BE

B2) Is s2 normalized to Form C?: True
Characters in string s2 = 1E09 00BE

B3) Is s2 normalized to Form D?: True
Characters in string s2 = 0063 0327 0301 00BE

B4) Is s2 normalized to Form KC?: True
Characters in string s2 = 1E09 0033 2044 0034

B5) Is s2 normalized to Form KD?: True
Characters in string s2 = 0063 0327 0301 0033
 2044 0034

*/
J#
// This example demonstrates the String.Normalize method
//                       and the String.IsNormalized method
import System.*;
import System.Text.*;

class Sample
{
    public static void main(String[]
 args)
    {
        // Character c; combining characters acute and cedilla; character
 3/4
        String s1 = new String(new char[]
 { '\u0063', '\u0301', '\u0327', 
            '\u00BE' });
        String s2 = null;
        String divider = new String('-', 80);
        divider = String.Concat(Environment.get_NewLine(), divider, 
            Environment.get_NewLine());

        try {
            Show("s1", s1);
            Console.WriteLine();
            Console.WriteLine("U+0063 = LATIN SMALL LETTER C");
            Console.WriteLine("U+0301 = COMBINING ACUTE ACCENT");
            Console.WriteLine("U+0327 = COMBINING CEDILLA");
            Console.WriteLine("U+00BE = VULGAR FRACTION THREE QUARTERS");
            Console.WriteLine(divider);

            Console.WriteLine("A1) Is s1 normalized to the default
 form " 
                + "(Form C)?: {0}", System.Convert.ToString(s1.IsNormalized()));
            Console.WriteLine("A2) Is s1 normalized to Form C?:  {0}",
 
                System.Convert.ToString(s1.
                IsNormalized(NormalizationForm.FormC)));
            Console.WriteLine("A3) Is s1 normalized to Form D?:  {0}",
 
                System.Convert.ToString(s1.
                IsNormalized(NormalizationForm.FormD)));
            Console.WriteLine("A4) Is s1 normalized to Form KC?: {0}",
 
                System.Convert.ToString(s1.
                IsNormalized(NormalizationForm.FormKC)));
            Console.WriteLine("A5) Is s1 normalized to Form KD?: {0}",
 
                System.Convert.ToString(s1.
                IsNormalized(NormalizationForm.FormKD)));

            Console.WriteLine(divider);

            Console.WriteLine("Set string s2 to each normalized
 form of " 
                + "string s1.");
            Console.WriteLine();
            Console.WriteLine("U+1E09 = LATIN SMALL LETTER C WITH CEDILLA "
 
                + "AND ACUTE");
            Console.WriteLine("U+0033 = DIGIT THREE");
            Console.WriteLine("U+2044 = FRACTION SLASH");
            Console.WriteLine("U+0034 = DIGIT FOUR");
            Console.WriteLine(divider);

            s2 = s1.Normalize();
            Console.Write("B1) Is s2 normalized to the default
 form " 
                + "(Form C)?: ");
            Console.WriteLine(s2.IsNormalized());
            Show("s2", s2);
            Console.WriteLine();

            s2 = s1.Normalize(NormalizationForm.FormC);
            Console.Write("B2) Is s2 normalized to Form C?: ");
            Console.WriteLine(s2.IsNormalized(NormalizationForm.FormC));
            Show("s2", s2);
            Console.WriteLine();

            s2 = s1.Normalize(NormalizationForm.FormD);
            Console.Write("B3) Is s2 normalized to Form D?: ");
            Console.WriteLine(s2.IsNormalized(NormalizationForm.FormD));
            Show("s2", s2);
            Console.WriteLine();

            s2 = s1.Normalize(NormalizationForm.FormKC);
            Console.Write("B4) Is s2 normalized to Form KC?: ");
            Console.WriteLine(s2.IsNormalized(NormalizationForm.FormKC));
            Show("s2", s2);
            Console.WriteLine();

            s2 = s1.Normalize(NormalizationForm.FormKD);
            Console.Write("B5) Is s2 normalized to Form KD?: ");
            Console.WriteLine(s2.IsNormalized(NormalizationForm.FormKD));
            Show("s2", s2);
            Console.WriteLine();
        }
        catch (System.Exception e) {
            Console.WriteLine(e.get_Message());
        }
    } //main

    private static void
 Show(String title, String s)
    {
        Console.Write("Characters in string
 {0} = ", title);
        char myCharArray[] = s.ToCharArray();
        for (int iCtr = 0; iCtr < myCharArray.length;
 iCtr++) {
            char c = myCharArray[iCtr];
            Console.Write(((System.Int32)c).ToString("X4") + " ");
        }
        Console.WriteLine();
    } //Show
} //Sample
/*
This example produces the following results:

Characters in string s1 = 0063 0301 0327 00BE

U+0063 = LATIN SMALL LETTER C
U+0301 = COMBINING ACUTE ACCENT
U+0327 = COMBINING CEDILLA
U+00BE = VULGAR FRACTION THREE QUARTERS

--------------------------------------------------------------------------------

A1) Is s1 normalized to the default form (Form C)?: False
A2) Is s1 normalized to Form C?:  False
A3) Is s1 normalized to Form D?:  False
A4) Is s1 normalized to Form KC?: False
A5) Is s1 normalized to Form KD?: False

--------------------------------------------------------------------------------

Set string s2 to each normalized form of string
 s1.

U+1E09 = LATIN SMALL LETTER C WITH CEDILLA AND ACUTE
U+0033 = DIGIT THREE
U+2044 = FRACTION SLASH
U+0034 = DIGIT FOUR

--------------------------------------------------------------------------------

B1) Is s2 normalized to the default form (Form C)?: True
Characters in string s2 = 1E09 00BE

B2) Is s2 normalized to Form C?: True
Characters in string s2 = 1E09 00BE

B3) Is s2 normalized to Form D?: True
Characters in string s2 = 0063 0327 0301 00BE

B4) Is s2 normalized to Form KC?: True
Characters in string s2 = 1E09 0033 2044 0034

B5) Is s2 normalized to Form KD?: True
Characters in string s2 = 0063 0327 0301 0033
 2044 0034

*/
プラットフォームプラットフォーム

Windows 98, Windows 2000 SP4, Windows Millennium Edition, Windows Server 2003, Windows XP Media Center Edition, Windows XP Professional x64 Edition, Windows XP SP2, Windows XP Starter Edition

開発プラットフォームの中には、.NET Framework によってサポートされていないバージョンがあります。サポートされているバージョンについては、「システム要件」を参照してください。

バージョン情報バージョン情報
.NET Framework
サポート対象 : 2.0
参照参照
関連項目
String クラス
String メンバ
System 名前空間
Normalize

String.IsNormalized メソッド (NormalizationForm)

メモ : このメソッドは、.NET Framework version 2.0 で新しく追加されたものです。

この文字列が、指定された Unicode 正規形であるかどうかを示します。

名前空間: System
アセンブリ: mscorlib (mscorlib.dll 内)
構文構文

Visual Basic (宣言)
Public Function IsNormalized ( _
    normalizationForm As NormalizationForm _
) As Boolean
Visual Basic (使用法)
Dim instance As String
Dim normalizationForm As NormalizationForm
Dim returnValue As Boolean

returnValue = instance.IsNormalized(normalizationForm)
C#
public bool IsNormalized (
    NormalizationForm normalizationForm
)
C++
public:
bool IsNormalized (
    NormalizationForm normalizationForm
)
J#
public boolean IsNormalized (
    NormalizationForm normalizationForm
)
JScript
public function IsNormalized (
    normalizationForm : NormalizationForm
) : boolean

パラメータ

normalizationForm

Unicode 正規形。

戻り値
この文字列が normalizationForm パラメータに指定された正規形である場合は true。それ以外の場合は false。

解説解説

一部の Unicode 文字には、組み合わせ文字や複合文字から成る、複数の等価なバイナリ表現が存在します。同じ文字に対して複数の表現方法が存在すると、検索、並べ替え、比較などの処理が複雑になります。

Unicode Standard では、同等のバイナリ表現が与えられたときに、結果的に同じ文字になるのであれば常に単一のバイナリ表現を返す、正規化と呼ばれるプロセスを定義しています。正規化は、それぞれ異なる規則に基づく複数のアルゴリズム (正規化形式) で実行されます。.NET Framework では、現在、C、D、KC、および KD 形式の正規化をサポートしています。

サポートされる Unicode 正規形の詳細については、「System.Text.NormalizationForm」を参照してください。

使用例使用例

IsNormalized メソッドおよび Normalize メソッドのコード例を次に示します。

Visual Basic
' This example demonstrates the String.Normalize method
'                       and the String.IsNormalized method
Imports System
Imports System.Text
Imports Microsoft.VisualBasic

Class Sample
   Public Shared Sub Main()
      ' Character c; combining characters acute and cedilla; character
 3/4
      Dim s1 = New [String](New
 Char() {ChrW(&H0063), ChrW(&H0301), ChrW(&H0327),
 ChrW(&H00BE)})
      Dim s2 As String =
 Nothing
      Dim divider = New [String]("-"c,
 80)
      divider = [String].Concat(Environment.NewLine, divider, Environment.NewLine)
      
      Try
         Show("s1", s1)
         Console.WriteLine()
         Console.WriteLine("U+0063 = LATIN SMALL LETTER C")
         Console.WriteLine("U+0301 = COMBINING ACUTE ACCENT")
         Console.WriteLine("U+0327 = COMBINING CEDILLA")
         Console.WriteLine("U+00BE = VULGAR FRACTION THREE QUARTERS")

         Console.WriteLine(divider)
         
         Console.WriteLine("A1) Is s1 normalized to the default
 form (Form C)?: {0}", s1.IsNormalized())
         Console.WriteLine("A2) Is s1 normalized to Form C?: 
 {0}", s1.IsNormalized(NormalizationForm.FormC))
         Console.WriteLine("A3) Is s1 normalized to Form D?: 
 {0}", s1.IsNormalized(NormalizationForm.FormD))
         Console.WriteLine("A4) Is s1 normalized to Form KC?:
 {0}", s1.IsNormalized(NormalizationForm.FormKC))
         Console.WriteLine("A5) Is s1 normalized to Form KD?:
 {0}", s1.IsNormalized(NormalizationForm.FormKD))
         
         Console.WriteLine(divider)
         
         Console.WriteLine("Set string s2 to each normalized form
 of string s1.")
         Console.WriteLine()
         Console.WriteLine("U+1E09 = LATIN SMALL LETTER C WITH
 CEDILLA AND ACUTE")
         Console.WriteLine("U+0033 = DIGIT THREE")
         Console.WriteLine("U+2044 = FRACTION SLASH")
         Console.WriteLine("U+0034 = DIGIT FOUR")
         Console.WriteLine(divider)
         
         s2 = s1.Normalize()
         Console.Write("B1) Is s2 normalized to the default form
 (Form C)?: ")
         Console.WriteLine(s2.IsNormalized())
         Show("s2", s2)
         Console.WriteLine()
         
         s2 = s1.Normalize(NormalizationForm.FormC)
         Console.Write("B2) Is s2 normalized to Form C?: ")
         Console.WriteLine(s2.IsNormalized(NormalizationForm.FormC))
         Show("s2", s2)
         Console.WriteLine()
         
         s2 = s1.Normalize(NormalizationForm.FormD)
         Console.Write("B3) Is s2 normalized to Form D?: ")
         Console.WriteLine(s2.IsNormalized(NormalizationForm.FormD))
         Show("s2", s2)
         Console.WriteLine()
         
         s2 = s1.Normalize(NormalizationForm.FormKC)
         Console.Write("B4) Is s2 normalized to Form KC?: ")
         Console.WriteLine(s2.IsNormalized(NormalizationForm.FormKC))
         Show("s2", s2)
         Console.WriteLine()
         
         s2 = s1.Normalize(NormalizationForm.FormKD)
         Console.Write("B5) Is s2 normalized to Form KD?: ")
         Console.WriteLine(s2.IsNormalized(NormalizationForm.FormKD))
         Show("s2", s2)
         Console.WriteLine()
      
      Catch e As Exception
         Console.WriteLine(e.Message)
      End Try
   End Sub 'Main
   
   Private Shared Sub Show(title
 As String, s As String)
      Console.Write("Characters in string {0} = ",
 title)
      Dim x As Char
      For Each x In  s.ToCharArray()
         Console.Write("{0:X4} ", AscW(x))
      Next x
      Console.WriteLine()
   End Sub 'Show
End Class 'Sample
'
'This example produces the following results:
'
'Characters in string s1 = 0063 0301 0327 00BE
'
'U+0063 = LATIN SMALL LETTER C
'U+0301 = COMBINING ACUTE ACCENT
'U+0327 = COMBINING CEDILLA
'U+00BE = VULGAR FRACTION THREE QUARTERS
'
'--------------------------------------------------------------------------------
'
'A1) Is s1 normalized to the default form (Form C)?: False
'A2) Is s1 normalized to Form C?:  False
'A3) Is s1 normalized to Form D?:  False
'A4) Is s1 normalized to Form KC?: False
'A5) Is s1 normalized to Form KD?: False
'
'--------------------------------------------------------------------------------
'
'Set string s2 to each normalized form of string s1.
'
'U+1E09 = LATIN SMALL LETTER C WITH CEDILLA AND ACUTE
'U+0033 = DIGIT THREE
'U+2044 = FRACTION SLASH
'U+0034 = DIGIT FOUR
'
'--------------------------------------------------------------------------------
'
'B1) Is s2 normalized to the default form (Form C)?: True
'Characters in string s2 = 1E09 00BE
'
'B2) Is s2 normalized to Form C?: True
'Characters in string s2 = 1E09 00BE
'
'B3) Is s2 normalized to Form D?: True
'Characters in string s2 = 0063 0327 0301 00BE
'
'B4) Is s2 normalized to Form KC?: True
'Characters in string s2 = 1E09 0033 2044 0034
'
'B5) Is s2 normalized to Form KD?: True
'Characters in string s2 = 0063 0327 0301 0033 2044 0034
'
C#
// This example demonstrates the String.Normalize method
//                       and the String.IsNormalized method

using System;
using System.Text;

class Sample 
{
    public static void Main()
 
    {
// Character c; combining characters acute and cedilla; character 3/4
    string s1 = new String( new
 char[] {'\u0063', '\u0301', '\u0327', '\u00BE'});
    string s2 = null;
    string divider = new String('-', 80);
    divider = String.Concat(Environment.NewLine, divider, Environment.NewLine);

    try 
    {
    Show("s1", s1);
    Console.WriteLine();
    Console.WriteLine("U+0063 = LATIN SMALL LETTER C");
    Console.WriteLine("U+0301 = COMBINING ACUTE ACCENT");
    Console.WriteLine("U+0327 = COMBINING CEDILLA");
    Console.WriteLine("U+00BE = VULGAR FRACTION THREE QUARTERS");
    Console.WriteLine(divider);

    Console.WriteLine("A1) Is s1 normalized to the default
 form (Form C)?: {0}", 
                                 s1.IsNormalized());
    Console.WriteLine("A2) Is s1 normalized to Form C?:  {0}", 
                                 s1.IsNormalized(NormalizationForm.FormC));
    Console.WriteLine("A3) Is s1 normalized to Form D?:  {0}", 
                                 s1.IsNormalized(NormalizationForm.FormD));
    Console.WriteLine("A4) Is s1 normalized to Form KC?: {0}", 
                                 s1.IsNormalized(NormalizationForm.FormKC));
    Console.WriteLine("A5) Is s1 normalized to Form KD?: {0}", 
                                 s1.IsNormalized(NormalizationForm.FormKD));

    Console.WriteLine(divider);

    Console.WriteLine("Set string s2 to each normalized form
 of string s1.");
    Console.WriteLine();
    Console.WriteLine("U+1E09 = LATIN SMALL LETTER C WITH CEDILLA AND ACUTE");
    Console.WriteLine("U+0033 = DIGIT THREE");
    Console.WriteLine("U+2044 = FRACTION SLASH");
    Console.WriteLine("U+0034 = DIGIT FOUR");
    Console.WriteLine(divider);

    s2 = s1.Normalize();
    Console.Write("B1) Is s2 normalized to the default form
 (Form C)?: ");
    Console.WriteLine(s2.IsNormalized());
    Show("s2", s2);
    Console.WriteLine();

    s2 = s1.Normalize(NormalizationForm.FormC);
    Console.Write("B2) Is s2 normalized to Form C?: ");
    Console.WriteLine(s2.IsNormalized(NormalizationForm.FormC));
    Show("s2", s2);
    Console.WriteLine();

    s2 = s1.Normalize(NormalizationForm.FormD);
    Console.Write("B3) Is s2 normalized to Form D?: ");
    Console.WriteLine(s2.IsNormalized(NormalizationForm.FormD));
    Show("s2", s2);
    Console.WriteLine();

    s2 = s1.Normalize(NormalizationForm.FormKC);
    Console.Write("B4) Is s2 normalized to Form KC?: ");
    Console.WriteLine(s2.IsNormalized(NormalizationForm.FormKC));
    Show("s2", s2);
    Console.WriteLine();

    s2 = s1.Normalize(NormalizationForm.FormKD);
    Console.Write("B5) Is s2 normalized to Form KD?: ");
    Console.WriteLine(s2.IsNormalized(NormalizationForm.FormKD));
    Show("s2", s2);
    Console.WriteLine();
    }

    catch (Exception e) 
        {
        Console.WriteLine(e.Message);
        }
    }

    private static void
 Show(string title, string s)
    {
    Console.Write("Characters in string
 {0} = ", title);
    foreach(short x in s.ToCharArray())
        {
        Console.Write("{0:X4} ", x);
        }
    Console.WriteLine();
    }
}
/*
This example produces the following results:

Characters in string s1 = 0063 0301 0327 00BE

U+0063 = LATIN SMALL LETTER C
U+0301 = COMBINING ACUTE ACCENT
U+0327 = COMBINING CEDILLA
U+00BE = VULGAR FRACTION THREE QUARTERS

--------------------------------------------------------------------------------

A1) Is s1 normalized to the default form (Form C)?: False
A2) Is s1 normalized to Form C?:  False
A3) Is s1 normalized to Form D?:  False
A4) Is s1 normalized to Form KC?: False
A5) Is s1 normalized to Form KD?: False

--------------------------------------------------------------------------------

Set string s2 to each normalized form of string
 s1.

U+1E09 = LATIN SMALL LETTER C WITH CEDILLA AND ACUTE
U+0033 = DIGIT THREE
U+2044 = FRACTION SLASH
U+0034 = DIGIT FOUR

--------------------------------------------------------------------------------

B1) Is s2 normalized to the default form (Form C)?: True
Characters in string s2 = 1E09 00BE

B2) Is s2 normalized to Form C?: True
Characters in string s2 = 1E09 00BE

B3) Is s2 normalized to Form D?: True
Characters in string s2 = 0063 0327 0301 00BE

B4) Is s2 normalized to Form KC?: True
Characters in string s2 = 1E09 0033 2044 0034

B5) Is s2 normalized to Form KD?: True
Characters in string s2 = 0063 0327 0301 0033
 2044 0034

*/
C++
// This example demonstrates the String.Normalize method
//                       and the String.IsNormalized method
using namespace System;
using namespace System::Text;
void Show( String^ title, String^ s )
{
   Console::Write( "Characters in string
 {0} = ", title );
   System::Collections::IEnumerator^ myEnum = s->ToCharArray()->GetEnumerator();
   while ( myEnum->MoveNext() )
   {
      
      /*) * __try_cast < Char * > ( myEnum -> Current );*/
      int x;
      Console::Write( "{0:X4} ", x );
   }

   Console::WriteLine();
}

int main()
{
   
   // Character c; combining characters acute and cedilla; character
 3/4
   array<Char>^temp0 = {L'c',L'\u0301',L'\u0327',L'\u00BE'};
   String^ s1 = gcnew String( temp0 );
   String^ s2 = nullptr;
   String^ divider = gcnew String( '-',80 );
   divider = String::Concat( Environment::NewLine, divider, Environment::NewLine
 );
   try
   {
      Show( "s1", s1 );
      Console::WriteLine();
      Console::WriteLine( "U+0063 = LATIN SMALL LETTER C" );
      Console::WriteLine( "U+0301 = COMBINING ACUTE ACCENT" );
      Console::WriteLine( "U+0327 = COMBINING CEDILLA" );
      Console::WriteLine( "U+00BE = VULGAR FRACTION THREE QUARTERS" );
      Console::WriteLine( divider );
      Console::WriteLine( "A1) Is s1 normalized to the default
 form (Form C)?: {0}", s1->IsNormalized() );
      Console::WriteLine( "A2) Is s1 normalized to Form C?:  {0}", s1->IsNormalized(
 NormalizationForm::FormC ) );
      Console::WriteLine( "A3) Is s1 normalized to Form D?:  {0}", s1->IsNormalized(
 NormalizationForm::FormD ) );
      Console::WriteLine( "A4) Is s1 normalized to Form KC?: {0}", s1->IsNormalized(
 NormalizationForm::FormKC ) );
      Console::WriteLine( "A5) Is s1 normalized to Form KD?: {0}", s1->IsNormalized(
 NormalizationForm::FormKD ) );
      Console::WriteLine( divider );
      Console::WriteLine( "Set string s2 to each normalized form of string
 s1." );
      Console::WriteLine();
      Console::WriteLine( "U+1E09 = LATIN SMALL LETTER C WITH CEDILLA AND ACUTE"
 );
      Console::WriteLine( "U+0033 = DIGIT THREE" );
      Console::WriteLine( "U+2044 = FRACTION SLASH" );
      Console::WriteLine( "U+0034 = DIGIT FOUR" );
      Console::WriteLine( divider );
      s2 = s1->Normalize();
      Console::Write( "B1) Is s2 normalized to the default
 form (Form C)?: " );
      Console::WriteLine( s2->IsNormalized() );
      Show( "s2", s2 );
      Console::WriteLine();
      s2 = s1->Normalize( NormalizationForm::FormC );
      Console::Write( "B2) Is s2 normalized to Form C?: " );
      Console::WriteLine( s2->IsNormalized( NormalizationForm::FormC ) );
      Show( "s2", s2 );
      Console::WriteLine();
      s2 = s1->Normalize( NormalizationForm::FormD );
      Console::Write( "B3) Is s2 normalized to Form D?: " );
      Console::WriteLine( s2->IsNormalized( NormalizationForm::FormD ) );
      Show( "s2", s2 );
      Console::WriteLine();
      s2 = s1->Normalize( NormalizationForm::FormKC );
      Console::Write( "B4) Is s2 normalized to Form KC?: " );
      Console::WriteLine( s2->IsNormalized( NormalizationForm::FormKC ) );
      Show( "s2", s2 );
      Console::WriteLine();
      s2 = s1->Normalize( NormalizationForm::FormKD );
      Console::Write( "B5) Is s2 normalized to Form KD?: " );
      Console::WriteLine( s2->IsNormalized( NormalizationForm::FormKD ) );
      Show( "s2", s2 );
      Console::WriteLine();
   }
   catch ( Exception^ e ) 
   {
      Console::WriteLine( e->Message );
   }

}

/*
This example produces the following results:

Characters in string s1 = 0063 0301 0327 00BE

U+0063 = LATIN SMALL LETTER C
U+0301 = COMBINING ACUTE ACCENT
U+0327 = COMBINING CEDILLA
U+00BE = VULGAR FRACTION THREE QUARTERS

--------------------------------------------------------------------------------

A1) Is s1 normalized to the default form (Form C)?: False
A2) Is s1 normalized to Form C?:  False
A3) Is s1 normalized to Form D?:  False
A4) Is s1 normalized to Form KC?: False
A5) Is s1 normalized to Form KD?: False

--------------------------------------------------------------------------------

Set string s2 to each normalized form of string
 s1.

U+1E09 = LATIN SMALL LETTER C WITH CEDILLA AND ACUTE
U+0033 = DIGIT THREE
U+2044 = FRACTION SLASH
U+0034 = DIGIT FOUR

--------------------------------------------------------------------------------

B1) Is s2 normalized to the default form (Form C)?: True
Characters in string s2 = 1E09 00BE

B2) Is s2 normalized to Form C?: True
Characters in string s2 = 1E09 00BE

B3) Is s2 normalized to Form D?: True
Characters in string s2 = 0063 0327 0301 00BE

B4) Is s2 normalized to Form KC?: True
Characters in string s2 = 1E09 0033 2044 0034

B5) Is s2 normalized to Form KD?: True
Characters in string s2 = 0063 0327 0301 0033
 2044 0034

*/
J#
// This example demonstrates the String.Normalize method
//                       and the String.IsNormalized method
import System.*;
import System.Text.*;

class Sample
{
    public static void main(String[]
 args)
    {
        // Character c; combining characters acute and cedilla; character
 3/4
        String s1 = new String(new char[]
 { '\u0063', '\u0301', '\u0327', 
            '\u00BE' });
        String s2 = null;
        String divider = new String('-', 80);
        divider = String.Concat(Environment.get_NewLine(), divider, 
            Environment.get_NewLine());

        try {
            Show("s1", s1);
            Console.WriteLine();
            Console.WriteLine("U+0063 = LATIN SMALL LETTER C");
            Console.WriteLine("U+0301 = COMBINING ACUTE ACCENT");
            Console.WriteLine("U+0327 = COMBINING CEDILLA");
            Console.WriteLine("U+00BE = VULGAR FRACTION THREE QUARTERS");
            Console.WriteLine(divider);

            Console.WriteLine("A1) Is s1 normalized to the default
 form " 
                + "(Form C)?: {0}", System.Convert.ToString(s1.IsNormalized()));
            Console.WriteLine("A2) Is s1 normalized to Form C?:  {0}",
 
                System.Convert.ToString(s1.
                IsNormalized(NormalizationForm.FormC)));
            Console.WriteLine("A3) Is s1 normalized to Form D?:  {0}",
 
                System.Convert.ToString(s1.
                IsNormalized(NormalizationForm.FormD)));
            Console.WriteLine("A4) Is s1 normalized to Form KC?: {0}",
 
                System.Convert.ToString(s1.
                IsNormalized(NormalizationForm.FormKC)));
            Console.WriteLine("A5) Is s1 normalized to Form KD?: {0}",
 
                System.Convert.ToString(s1.
                IsNormalized(NormalizationForm.FormKD)));

            Console.WriteLine(divider);

            Console.WriteLine("Set string s2 to each normalized
 form of " 
                + "string s1.");
            Console.WriteLine();
            Console.WriteLine("U+1E09 = LATIN SMALL LETTER C WITH CEDILLA "
 
                + "AND ACUTE");
            Console.WriteLine("U+0033 = DIGIT THREE");
            Console.WriteLine("U+2044 = FRACTION SLASH");
            Console.WriteLine("U+0034 = DIGIT FOUR");
            Console.WriteLine(divider);

            s2 = s1.Normalize();
            Console.Write("B1) Is s2 normalized to the default
 form " 
                + "(Form C)?: ");
            Console.WriteLine(s2.IsNormalized());
            Show("s2", s2);
            Console.WriteLine();

            s2 = s1.Normalize(NormalizationForm.FormC);
            Console.Write("B2) Is s2 normalized to Form C?: ");
            Console.WriteLine(s2.IsNormalized(NormalizationForm.FormC));
            Show("s2", s2);
            Console.WriteLine();

            s2 = s1.Normalize(NormalizationForm.FormD);
            Console.Write("B3) Is s2 normalized to Form D?: ");
            Console.WriteLine(s2.IsNormalized(NormalizationForm.FormD));
            Show("s2", s2);
            Console.WriteLine();

            s2 = s1.Normalize(NormalizationForm.FormKC);
            Console.Write("B4) Is s2 normalized to Form KC?: ");
            Console.WriteLine(s2.IsNormalized(NormalizationForm.FormKC));
            Show("s2", s2);
            Console.WriteLine();

            s2 = s1.Normalize(NormalizationForm.FormKD);
            Console.Write("B5) Is s2 normalized to Form KD?: ");
            Console.WriteLine(s2.IsNormalized(NormalizationForm.FormKD));
            Show("s2", s2);
            Console.WriteLine();
        }
        catch (System.Exception e) {
            Console.WriteLine(e.get_Message());
        }
    } //main

    private static void
 Show(String title, String s)
    {
        Console.Write("Characters in string
 {0} = ", title);
        char myCharArray[] = s.ToCharArray();
        for (int iCtr = 0; iCtr < myCharArray.length;
 iCtr++) {
            char c = myCharArray[iCtr];
            Console.Write(((System.Int32)c).ToString("X4") + " ");
        }
        Console.WriteLine();
    } //Show
} //Sample
/*
This example produces the following results:

Characters in string s1 = 0063 0301 0327 00BE

U+0063 = LATIN SMALL LETTER C
U+0301 = COMBINING ACUTE ACCENT
U+0327 = COMBINING CEDILLA
U+00BE = VULGAR FRACTION THREE QUARTERS

--------------------------------------------------------------------------------

A1) Is s1 normalized to the default form (Form C)?: False
A2) Is s1 normalized to Form C?:  False
A3) Is s1 normalized to Form D?:  False
A4) Is s1 normalized to Form KC?: False
A5) Is s1 normalized to Form KD?: False

--------------------------------------------------------------------------------

Set string s2 to each normalized form of string
 s1.

U+1E09 = LATIN SMALL LETTER C WITH CEDILLA AND ACUTE
U+0033 = DIGIT THREE
U+2044 = FRACTION SLASH
U+0034 = DIGIT FOUR

--------------------------------------------------------------------------------

B1) Is s2 normalized to the default form (Form C)?: True
Characters in string s2 = 1E09 00BE

B2) Is s2 normalized to Form C?: True
Characters in string s2 = 1E09 00BE

B3) Is s2 normalized to Form D?: True
Characters in string s2 = 0063 0327 0301 00BE

B4) Is s2 normalized to Form KC?: True
Characters in string s2 = 1E09 0033 2044 0034

B5) Is s2 normalized to Form KD?: True
Characters in string s2 = 0063 0327 0301 0033
 2044 0034

*/
プラットフォームプラットフォーム

Windows 98, Windows 2000 SP4, Windows Millennium Edition, Windows Server 2003, Windows XP Media Center Edition, Windows XP Professional x64 Edition, Windows XP SP2, Windows XP Starter Edition

開発プラットフォームの中には、.NET Framework によってサポートされていないバージョンがあります。サポートされているバージョンについては、「システム要件」を参照してください。

バージョン情報バージョン情報
.NET Framework
サポート対象 : 2.0
参照参照
関連項目
String クラス
String メンバ
System 名前空間
Normalize

String.IsNormalized メソッド

この文字列が、特定の Unicode 正規形であるかどうかを示します。
オーバーロードの一覧オーバーロードの一覧

名前 説明
String.IsNormalized () この文字列が、Unicode 正規形 C であるかどうかを示します。
String.IsNormalized (NormalizationForm) この文字列が、指定された Unicode 正規形であるかどうかを示します。
参照参照

関連項目

String クラス
String メンバ
System 名前空間
Normalize

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String.IsNormalized メソッド ()
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String.IsNormalizedのお隣キーワード

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