Encoder.GetBytes Method

Definition

Namespace:: System.Text

Assemblies:: netstandard.dll, System.Runtime.dll

Assembly:: System.Runtime.dll

Assembly:: netstandard.dll

Assembly:: mscorlib.dll

Assemblies:: mscorlib.dll, System.Text.Encoding.dll

Assembly:: System.Text.Encoding.dll

Important

Some information relates to prerelease product that may be substantially modified before it’s released. Microsoft makes no warranties, express or implied, with respect to the information provided here.

When overridden in a derived class, encodes a set of characters into a sequence of bytes.

Overloads

GetBytes(ReadOnlySpan<Char>, Span<Byte>, Boolean)	When overridden in a derived class, encodes a set of characters in the input characters span and any characters in the internal buffer into a sequence of bytes that are stored in the input byte span. A parameter indicates whether to clear the internal state of the encoder after the conversion.
GetBytes(Char, Int32, Byte, Int32, Boolean)	When overridden in a derived class, encodes a set of characters starting at the specified character pointer and any characters in the internal buffer into a sequence of bytes that are stored starting at the specified byte pointer. A parameter indicates whether to clear the internal state of the encoder after the conversion.
GetBytes(Char[], Int32, Int32, Byte[], Int32, Boolean)	When overridden in a derived class, encodes a set of characters from the specified character array and any characters in the internal buffer into the specified byte array. A parameter indicates whether to clear the internal state of the encoder after the conversion.

Remarks

Remember that the Encoder object saves state between calls to GetBytes. When the application is done with a stream of data, it should set the flush parameter to true in the last call to GetBytes to make sure that the state information is flushed and that the encoded bytes are properly terminated. With this setting, the encoder ignores invalid bytes at the end of the data block, such as unmatched surrogates or incomplete combining sequences, and clears the internal buffer.

To calculate the exact buffer size that GetBytes requires to store the resulting characters, the application should use GetByteCount.

If GetBytes is called with flush set to false, the encoder stores trailing bytes at the end of the data block in an internal buffer and uses them in the next encoding operation. The application should call GetByteCount on a block of data immediately before calling GetBytes on the same block, so that any trailing characters from the previous block are included in the calculation.

If your application is to convert many segments of an input stream, consider using the Convert method. GetBytes will throw an exception if the output buffer isn't large enough, but Convert will fill as much space as possible and return the chars read and bytes written. Also see the Encoding.GetBytes topic for more comments.

GetBytes(ReadOnlySpan<Char>, Span<Byte>, Boolean)

Source:: Encoder.cs

Source:: Encoder.cs

Source:: Encoder.cs

Source:: Encoder.cs

When overridden in a derived class, encodes a set of characters in the input characters span and any characters in the internal buffer into a sequence of bytes that are stored in the input byte span. A parameter indicates whether to clear the internal state of the encoder after the conversion.

public:
 virtual int GetBytes(ReadOnlySpan<char> chars, Span<System::Byte> bytes, bool flush);

public virtual int GetBytes(ReadOnlySpan<char> chars, Span<byte> bytes, bool flush);

abstract member GetBytes : ReadOnlySpan<char> * Span<byte> * bool -> int
override this.GetBytes : ReadOnlySpan<char> * Span<byte> * bool -> int

Public Overridable Function GetBytes (chars As ReadOnlySpan(Of Char), bytes As Span(Of Byte), flush As Boolean) As Integer

Parameters

chars: ReadOnlySpan<Char>

A character span to encode.

bytes: Span<Byte>

A byte span to write the resulting sequence of bytes to.

flush: Boolean

true to clear the internal state of the encoder after the conversion; otherwise, false.

Returns

Int32

The actual number of bytes written at the location indicated by the bytes parameter.

Applies to

.NET 10 and other versions

Product	Versions
.NET	Core 2.1, Core 2.2, Core 3.0, Core 3.1, 5, 6, 7, 8, 9, 10
.NET Standard	2.1

GetBytes(Char, Int32, Byte, Int32, Boolean)

Source:: Encoder.cs

Source:: Encoder.cs

Source:: Encoder.cs

Source:: Encoder.cs

Important

This API is not CLS-compliant.

When overridden in a derived class, encodes a set of characters starting at the specified character pointer and any characters in the internal buffer into a sequence of bytes that are stored starting at the specified byte pointer. A parameter indicates whether to clear the internal state of the encoder after the conversion.

public:
 virtual int GetBytes(char* chars, int charCount, System::Byte* bytes, int byteCount, bool flush);

[System.CLSCompliant(false)]
public virtual int GetBytes(char* chars, int charCount, byte* bytes, int byteCount, bool flush);

[System.CLSCompliant(false)]
[System.Runtime.InteropServices.ComVisible(false)]
public virtual int GetBytes(char* chars, int charCount, byte* bytes, int byteCount, bool flush);

[System.CLSCompliant(false)]
[System.Runtime.InteropServices.ComVisible(false)]
[System.Security.SecurityCritical]
public virtual int GetBytes(char* chars, int charCount, byte* bytes, int byteCount, bool flush);

[<System.CLSCompliant(false)>]
abstract member GetBytes : nativeptr<char> * int * nativeptr<byte> * int * bool -> int
override this.GetBytes : nativeptr<char> * int * nativeptr<byte> * int * bool -> int

[<System.CLSCompliant(false)>]
[<System.Runtime.InteropServices.ComVisible(false)>]
abstract member GetBytes : nativeptr<char> * int * nativeptr<byte> * int * bool -> int
override this.GetBytes : nativeptr<char> * int * nativeptr<byte> * int * bool -> int

[<System.CLSCompliant(false)>]
[<System.Runtime.InteropServices.ComVisible(false)>]
[<System.Security.SecurityCritical>]
abstract member GetBytes : nativeptr<char> * int * nativeptr<byte> * int * bool -> int
override this.GetBytes : nativeptr<char> * int * nativeptr<byte> * int * bool -> int

Parameters

chars: Char*

A pointer to the first character to encode.

charCount: Int32

The number of characters to encode.

bytes: Byte*

A pointer to the location at which to start writing the resulting sequence of bytes.

byteCount: Int32

The maximum number of bytes to write.

flush: Boolean

true to clear the internal state of the encoder after the conversion; otherwise, false.

Returns

Int32

The actual number of bytes written at the location indicated by the bytes parameter.

Attributes: CLSCompliantAttribute ComVisibleAttribute SecurityCriticalAttribute

Exceptions

ArgumentNullException

chars is null (Nothing).

-or-

bytes is null (Nothing).

ArgumentOutOfRangeException

charCount or byteCount is less than zero.

ArgumentException

byteCount is less than the resulting number of bytes.

EncoderFallbackException

A fallback occurred (for more information, see Character Encoding in .NET)

-and-

Fallback is set to EncoderExceptionFallback.

Applies to

.NET 10 and other versions

Product	Versions
.NET	Core 2.0, Core 2.1, Core 2.2, Core 3.0, Core 3.1, 5, 6, 7, 8, 9, 10
.NET Framework	2.0, 3.0, 3.5, 4.0, 4.5, 4.5.1, 4.5.2, 4.6, 4.6.1, 4.6.2, 4.7, 4.7.1, 4.7.2, 4.8, 4.8.1
.NET Standard	2.0, 2.1

GetBytes(Char[], Int32, Int32, Byte[], Int32, Boolean)

Source:: Encoder.cs

Source:: Encoder.cs

Source:: Encoder.cs

Source:: Encoder.cs

When overridden in a derived class, encodes a set of characters from the specified character array and any characters in the internal buffer into the specified byte array. A parameter indicates whether to clear the internal state of the encoder after the conversion.

public:
 abstract int GetBytes(cli::array <char> ^ chars, int charIndex, int charCount, cli::array <System::Byte> ^ bytes, int byteIndex, bool flush);

public abstract int GetBytes(char[] chars, int charIndex, int charCount, byte[] bytes, int byteIndex, bool flush);

abstract member GetBytes : char[] * int * int * byte[] * int * bool -> int

Public MustOverride Function GetBytes (chars As Char(), charIndex As Integer, charCount As Integer, bytes As Byte(), byteIndex As Integer, flush As Boolean) As Integer

Parameters

chars: Char[]

The character array containing the set of characters to encode.

charIndex: Int32

The index of the first character to encode.

charCount: Int32

The number of characters to encode.

bytes: Byte[]

The byte array to contain the resulting sequence of bytes.

byteIndex: Int32

The index at which to start writing the resulting sequence of bytes.

flush: Boolean

true to clear the internal state of the encoder after the conversion; otherwise, false.

Returns

Int32

The actual number of bytes written into bytes.

Exceptions

ArgumentNullException

chars is null (Nothing).

-or-

bytes is null (Nothing).

ArgumentOutOfRangeException

charIndex or charCount or byteIndex is less than zero.

-or-

charIndex and charCount do not denote a valid range in chars.

-or-

byteIndex is not a valid index in bytes.

ArgumentException

bytes does not have enough capacity from byteIndex to the end of the array to accommodate the resulting bytes.

EncoderFallbackException

A fallback occurred (for more information, see Character Encoding in .NET)

-and-

Fallback is set to EncoderExceptionFallback.

Examples

The following example demonstrates how to encode a range of elements from a character array and store the encoded bytes in a range of elements in a byte array. The GetByteCount method is used to determine the size of the array required by GetBytes.

using System;
using System.Text;

class EncoderExample {
    public static void Main() {
        Byte[] bytes;
        // Unicode characters.
        Char[] chars = new Char[] {
            '\u0023', // #
            '\u0025', // %
            '\u03a0', // Pi
            '\u03a3'  // Sigma
        };
        
        Encoder uniEncoder = Encoding.Unicode.GetEncoder();
        
        int byteCount = uniEncoder.GetByteCount(chars, 0, chars.Length, true);
        bytes = new Byte[byteCount];
        int bytesEncodedCount = uniEncoder.GetBytes(chars, 0, chars.Length, bytes, 0, true);
        
        Console.WriteLine(
            "{0} bytes used to encode characters.", bytesEncodedCount
        );

        Console.Write("Encoded bytes: ");
        foreach (Byte b in bytes) {
            Console.Write("[{0}]", b);
        }
        Console.WriteLine();
    }
}

/* This code example produces the following output.

8 bytes used to encode characters.
Encoded bytes: [35][0][37][0][160][3][163][3]

*/

Imports System.Text
Imports Microsoft.VisualBasic.Strings

Class EncoderExample
    
    Public Shared Sub Main()
        Dim bytes() As Byte
        ' Unicode characters.
        ' ChrW(35)  = #
        ' ChrW(37)  = %
        ' ChrW(928) = Pi
        ' ChrW(931) = Sigma
        Dim chars() As Char = {ChrW(35), ChrW(37), ChrW(928), ChrW(931)}
        
        Dim uniEncoder As Encoder = Encoding.Unicode.GetEncoder()
        
        Dim byteCount As Integer = _
            uniEncoder.GetByteCount(chars, 0, chars.Length, True)
        bytes = New Byte(byteCount - 1) {}
        Dim bytesEncodedCount As Integer = _
            uniEncoder.GetBytes(chars, 0, chars.Length, bytes, 0, True)
        
        Console.WriteLine( _
            "{0} bytes used to encode characters.", _
            bytesEncodedCount _
        )
        
        Console.Write("Encoded bytes: ")
        Dim b As Byte
        For Each b In  bytes
            Console.Write("[{0}]", b)
        Next b
        Console.WriteLine()
    End Sub
End Class

'This code example produces the following output.
'8 bytes used to encode characters.
'Encoded bytes: [35][0][37][0][160][3][163][3]
'

Applies to

.NET 10 and other versions

Product	Versions
.NET	Core 1.0, Core 1.1, Core 2.0, Core 2.1, Core 2.2, Core 3.0, Core 3.1, 5, 6, 7, 8, 9, 10
.NET Framework	1.1, 2.0, 3.0, 3.5, 4.0, 4.5, 4.5.1, 4.5.2, 4.6, 4.6.1, 4.6.2, 4.7, 4.7.1, 4.7.2, 4.8, 4.8.1
.NET Standard	1.0, 1.1, 1.2, 1.3, 1.4, 1.6, 2.0, 2.1
UWP	10.0

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Encoder.GetBytes Method

Definition

Overloads

Remarks

GetBytes(ReadOnlySpan<Char>, Span<Byte>, Boolean)

Parameters

Returns

Applies to

GetBytes(Char, Int32, Byte, Int32, Boolean)

Parameters

Returns

Exceptions

Applies to

GetBytes(Char[], Int32, Int32, Byte[], Int32, Boolean)

Parameters

Returns

Exceptions

Examples

Applies to

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Encoder.GetBytes Method

Definition

Overloads

Remarks

GetBytes(ReadOnlySpan<Char>, Span<Byte>, Boolean)

Parameters

Returns

Applies to

GetBytes(Char*, Int32, Byte*, Int32, Boolean)

Parameters

Returns

Exceptions

Applies to

GetBytes(Char[], Int32, Int32, Byte[], Int32, Boolean)

Parameters

Returns

Exceptions

Examples

Applies to

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GetBytes(Char, Int32, Byte, Int32, Boolean)