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Char.ConvertToUtf32 Yöntem

Tanım

UTF-16 kodlanmış vekil çiftinin değerini Unicode kod noktasına dönüştürür.

Aşırı Yüklemeler

ConvertToUtf32(Char, Char)

UTF-16 kodlanmış vekil çiftinin değerini Unicode kod noktasına dönüştürür.

ConvertToUtf32(String, Int32)

Bir dizede belirtilen konumdaki UTF-16 kodlanmış karakterinin veya vekil çiftinin değerini Unicode kod noktasına dönüştürür.

Örnekler

Aşağıdaki kod örneği ve ConvertToUtf32 yöntemlerini ConvertFromUtf32 gösteriyor.

// This example demonstrates the Char.ConvertFromUtf32() method
//                           and Char.ConvertToUtf32() overloads.
using namespace System;
void Show( String^ s )
{
//   Console::Write( "0x{0:X}, 0x{1:X}", (int)s->get_Chars( 0 ), (int)s->get_Chars( 1 ) );
   Console::Write( "0x{0:X}, 0x{1:X}", (int)s[ 0 ], (int)s[ 1 ] );
}

int main()
{
   int music = 0x1D161; //U+1D161 = MUSICAL SYMBOL SIXTEENTH NOTE

   String^ s1;
   String^ comment1a = "Create a UTF-16 encoded string from a code point.";
   String^ comment1b = "Create a code point from a surrogate pair at a certain position in a string.";
   String^ comment1c = "Create a code point from a high surrogate and a low surrogate code point.";
   
   // -------------------------------------------------------------------
   //  Convert the code point U+1D161 to UTF-16. The UTF-16 equivalent of 
   //  U+1D161 is a surrogate pair with hexadecimal values D834 and DD61.
   Console::WriteLine( comment1a );
   s1 = Char::ConvertFromUtf32( music );
   Console::Write( "    1a) 0x{0:X} => ", music );
   Show( s1 );
   Console::WriteLine();
   
   //  Convert the surrogate pair in the string at index position 
   //  zero to a code point.
   Console::WriteLine( comment1b );
   music = Char::ConvertToUtf32( s1, 0 );
   Console::Write( "    1b) " );
   Show( s1 );
   Console::WriteLine( " => 0x{0:X}", music );
   
   //  Convert the high and low characters in the surrogate pair into a code point.
   Console::WriteLine( comment1c );
   music = Char::ConvertToUtf32( s1[ 0 ], s1[ 1 ] );
   Console::Write( "    1c) " );
   Show( s1 );
   Console::WriteLine( " => 0x{0:X}", music );
}

/*
This example produces the following results:

Create a UTF-16 encoded string from a code point.
    1a) 0x1D161 => 0xD834, 0xDD61
Create a code point from a surrogate pair at a certain position in a string.
    1b) 0xD834, 0xDD61 => 0x1D161
Create a code point from a high surrogate and a low surrogate code point.
    1c) 0xD834, 0xDD61 => 0x1D161

*/
// This example demonstrates the Char.ConvertFromUtf32() method
//                           and Char.ConvertToUtf32() overloads.
using System;

class Sample
{
    public static void Main()
    {
    int letterA = 0x0041;  //U+00041 = LATIN CAPITAL LETTER A
    int music   = 0x1D161; //U+1D161 = MUSICAL SYMBOL SIXTEENTH NOTE
    string s1;
    string comment   = "Create a UTF-16 encoded string from a code point.";
    string comment1b = "Create a code point from a UTF-16 encoded string.";
    string comment2b = "Create a code point from a surrogate pair at a certain position in a string.";
    string comment2c = "Create a code point from a high surrogate and a low surrogate code point.";

//  Convert code point U+0041 to UTF-16. The UTF-16 equivalent of
//  U+0041 is a Char with hexadecimal value 0041.

    Console.WriteLine(comment);
    s1 = Char.ConvertFromUtf32(letterA);
    Console.Write("    1a) 0x{0:X} => ", letterA);
    Show(s1);
    Console.WriteLine();

//  Convert the lone UTF-16 character to a code point.

    Console.WriteLine(comment1b);
    letterA = Char.ConvertToUtf32(s1, 0);
    Console.Write("    1b) ");
    Show(s1);
    Console.WriteLine(" => 0x{0:X}", letterA);
    Console.WriteLine();

// -------------------------------------------------------------------

//  Convert the code point U+1D161 to UTF-16. The UTF-16 equivalent of
//  U+1D161 is a surrogate pair with hexadecimal values D834 and DD61.

    Console.WriteLine(comment);
    s1 = Char.ConvertFromUtf32(music);
    Console.Write("    2a) 0x{0:X} => ", music);
    Show(s1);
    Console.WriteLine();

//  Convert the surrogate pair in the string at index position
//  zero to a code point.

    Console.WriteLine(comment2b);
    music = Char.ConvertToUtf32(s1, 0);
    Console.Write("    2b) ");
    Show(s1);
    Console.WriteLine(" => 0x{0:X}", music);

//  Convert the high and low characters in the surrogate pair into a code point.

    Console.WriteLine(comment2c);
    music = Char.ConvertToUtf32(s1[0], s1[1]);
    Console.Write("    2c) ");
    Show(s1);
    Console.WriteLine(" => 0x{0:X}", music);
    }

    private static void Show(string s)
    {
    for (int x = 0; x < s.Length; x++)
        {
        Console.Write("0x{0:X}{1}",
                       (int)s[x],
                       ((x == s.Length-1)? String.Empty : ", "));
        }
    }
}
/*
This example produces the following results:

Create a UTF-16 encoded string from a code point.
    1a) 0x41 => 0x41
Create a code point from a UTF-16 encoded string.
    1b) 0x41 => 0x41

Create a UTF-16 encoded string from a code point.
    2a) 0x1D161 => 0xD834, 0xDD61
Create a code point from a surrogate pair at a certain position in a string.
    2b) 0xD834, 0xDD61 => 0x1D161
Create a code point from a high surrogate and a low surrogate code point.
    2c) 0xD834, 0xDD61 => 0x1D161

*/
open System

let show (s: string) =
    for x = 0 to s.Length - 1 do
        printf $"""0x{int s[x]:X}{if x = s.Length - 1 then String.Empty else ", "}"""                    

[<EntryPoint>]
let main _ =
    let letterA = 0x0041  //U+00041 = LATIN CAPITAL LETTER A
    let music   = 0x1D161 //U+1D161 = MUSICAL SYMBOL SIXTEENTH NOTE
    let comment   = "Create a UTF-16 encoded string from a code point."
    let comment1b = "Create a code point from a UTF-16 encoded string."
    let comment2b = "Create a code point from a surrogate pair at a certain position in a string."
    let comment2c = "Create a code point from a high surrogate and a low surrogate code point."

//  Convert code point U+0041 to UTF-16. The UTF-16 equivalent of
//  U+0041 is a Char with hexadecimal value 0041.

    printfn $"{comment}"
    let s1 = Char.ConvertFromUtf32 letterA
    printf $"    1a) 0x{letterA:X} => "
    show s1
    printfn ""

//  Convert the lone UTF-16 character to a code point.

    printfn $"{comment1b}"
    let letterA = Char.ConvertToUtf32(s1, 0)
    printf "    1b) "
    show s1
    printfn $" => 0x{letterA:X}"
    printfn ""

// -------------------------------------------------------------------

//  Convert the code point U+1D161 to UTF-16. The UTF-16 equivalent of
//  U+1D161 is a surrogate pair with hexadecimal values D834 and DD61.

    printfn $"{comment}"
    let s1 = Char.ConvertFromUtf32 music
    printf $"    2a) 0x{music:X} => "
    show s1
    printfn ""

//  Convert the surrogate pair in the string at index position
//  zero to a code point.

    printfn $"{comment2b}" 
    let music = Char.ConvertToUtf32(s1, 0)
    printf "    2b) "
    show s1
    printfn $" => 0x{music:X}"

//  Convert the high and low characters in the surrogate pair into a code point.

    printfn $"{comment2c}"
    let music = Char.ConvertToUtf32(s1[0], s1[1])
    printf "    2c) "
    show s1
    printfn $" => 0x{music:X}"

    0

// This example produces the following results:
//
// Create a UTF-16 encoded string from a code point.
//     1a) 0x41 => 0x41
// Create a code point from a UTF-16 encoded string.
//     1b) 0x41 => 0x41
//
// Create a UTF-16 encoded string from a code point.
//     2a) 0x1D161 => 0xD834, 0xDD61
// Create a code point from a surrogate pair at a certain position in a string.
//     2b) 0xD834, 0xDD61 => 0x1D161
// Create a code point from a high surrogate and a low surrogate code point.
//     2c) 0xD834, 0xDD61 => 0x1D161
Class Sample
   Public Shared Sub Main()
      Dim letterA As Integer = &H41    'U+00041 = LATIN CAPITAL LETTER A
      Dim music As Integer   = &H1D161 'U+1D161 = MUSICAL SYMBOL SIXTEENTH NOTE
      Dim s1 As String
      Dim comment   As String = "Create a UTF-16 encoded string from a code point."
      Dim comment1b As String = "Create a code point from a UTF-16 encoded string."
      Dim comment2b As String = "Create a code point from a surrogate pair at a certain position in a string."
      Dim comment2c As String = "Create a code point from a high surrogate and a low surrogate code point."
      
      '  Convert code point U+0041 to UTF-16. The UTF-16 equivalent of 
      '  U+0041 is a Char with hexadecimal value 0041.

      Console.WriteLine(comment)
      s1 = [Char].ConvertFromUtf32(letterA)
      Console.Write("    1a) 0x{0:X} => ", letterA)
      Show(s1)
      Console.WriteLine()
      
      '  Convert the lone UTF-16 character to a code point.

      Console.WriteLine(comment1b)
      letterA = [Char].ConvertToUtf32(s1, 0)
      Console.Write("    1b) ")
      Show(s1)
      Console.WriteLine(" => 0x{0:X}", letterA)
      Console.WriteLine()
      
      ' -------------------------------------------------------------------

      '  Convert the code point U+1D161 to UTF-16. The UTF-16 equivalent of 
      '  U+1D161 is a surrogate pair with hexadecimal values D834 and DD61.

      Console.WriteLine(comment)
      s1 = [Char].ConvertFromUtf32(music)
      Console.Write("    2a) 0x{0:X} => ", music)
      Show(s1)
      Console.WriteLine()
      
      '  Convert the surrogate pair in the string at index position 
      '  zero to a code point.

      Console.WriteLine(comment2b)
      music = [Char].ConvertToUtf32(s1, 0)
      Console.Write("    2b) ")
      Show(s1)
      Console.WriteLine(" => 0x{0:X}", music)
      
      '  Convert the high and low characters in the surrogate pair into a code point.

      Console.WriteLine(comment2c)
      music = [Char].ConvertToUtf32(s1.Chars(0), s1.Chars(1))
      Console.Write("    2c) ")
      Show(s1)
      Console.WriteLine(" => 0x{0:X}", music)
   End Sub
   
   Private Shared Sub Show(s As String)
      Dim x As Integer
      If s.Length = 0 Then Exit Sub
      For x = 0 To s.Length - 1
         Console.Write("0x{0:X}{1}", _
                        AscW(s.Chars(x)), _
                        IIf(x = s.Length - 1, [String].Empty, ", "))
      Next 
   End Sub 
End Class 
'
'This example produces the following results:
'
'Create a UTF-16 encoded string from a code point.
'    1a) 0x41 => 0x41
'Create a code point from a UTF-16 encoded string.
'    1b) 0x41 => 0x41
'
'Create a UTF-16 encoded string from a code point.
'    2a) 0x1D161 => 0xD834, 0xDD61
'Create a code point from a surrogate pair at a certain position in a string.
'    2b) 0xD834, 0xDD61 => 0x1D161
'Create a code point from a high surrogate and a low surrogate code point.
'    2c) 0xD834, 0xDD61 => 0x1D161
'

ConvertToUtf32(Char, Char)

UTF-16 kodlanmış vekil çiftinin değerini Unicode kod noktasına dönüştürür.

public:
 static int ConvertToUtf32(char highSurrogate, char lowSurrogate);
public static int ConvertToUtf32 (char highSurrogate, char lowSurrogate);
static member ConvertToUtf32 : char * char -> int
Public Shared Function ConvertToUtf32 (highSurrogate As Char, lowSurrogate As Char) As Integer

Parametreler

highSurrogate
Char

Yüksek yedek kod birimi (yani U+D800 ile U+DBFF arasında değişen bir kod birimi).

lowSurrogate
Char

Düşük yedek kod birimi (yani U+DC00 ile U+DFFF arasında değişen bir kod birimi).

Döndürülenler

Int32

ve parametreleriyle temsil edilen 21 bitLik Unicode highSurrogate lowSurrogate kod noktası.

Özel durumlar

highSurrogate U+D800 ile U+DBFF aralığında değil veya lowSurrogate U+DC00 ile U+DFFF aralığında değil.

Açıklamalar

Bir yedek çifti 21 bitLik Unicode kod noktasına dönüştürmek için bu yöntemi kullanın. UTF-16 verilerini UTF-32 verilerine dönüştürmek için sınıfını System.Text.UTF32Encoding kullanın.

Normalde, UTF-16 kodlaması 16 bit kod birimi olarak tek bir Unicode karakterini temsil eder. Ancak, iki 16 bit kod birimi olarak temsil edilen tek bir soyut karaktere olanak sağlayan vekil çiftleri de destekler. Bu iki nesne, ilk (yüksek) vekil için U+D800 ile U+DBFF arasında ve ikinci (düşük) yedek için Char U+DC00'den U+DFFF'ye kadar olan kod birimlerine sahip olması gerekir. Vekil çiftler yalnızca UTF-16 kodlaması tarafından de destekler. Bu yöntem, UTF-16 vekil çifti tarafından temsil edilen bir karakterin UTF-32 kodlaması kullanılarak bir karaktere dönüştürülmesine olanak sağlar.

Ayrıca bkz.

Şunlara uygulanır

ConvertToUtf32(String, Int32)

Bir dizede belirtilen konumdaki UTF-16 kodlanmış karakterinin veya vekil çiftinin değerini Unicode kod noktasına dönüştürür.

public:
 static int ConvertToUtf32(System::String ^ s, int index);
public static int ConvertToUtf32 (string s, int index);
static member ConvertToUtf32 : string * int -> int
Public Shared Function ConvertToUtf32 (s As String, index As Integer) As Integer

Parametreler

s
String

Karakter veya vekil çifti içeren bir dize.

index
Int32

içinde karakterin veya vekil çiftinin dizin s konumu.

Döndürülenler

Int32

Parametresi tarafından belirtilen parametre konumundaki karakter veya vekil çifti ile temsil edilen 21 bitLik Unicode s kod index noktası.

Özel durumlar

s, null değeridir.

index içinde bir konum s değildir.

Belirtilen dizin konumu bir vekil çifti içerir ve çiftin ilk karakteri geçerli bir yüksek vekil değil veya çiftdeki ikinci karakter geçerli bir düşük vekil değil.

Açıklamalar

Bir karakter veya vekil çifti 21 bitLik Unicode kod noktasına dönüştürmek için bu yöntemi kullanın. UTF-16 verilerini UTF-32 verilerine dönüştürmek için sınıfını System.Text.UTF32Encoding kullanın.

Ayrıca bkz.

Şunlara uygulanır