DecoderFallbackBuffer.Fallback(Byte[], Int32) DecoderFallbackBuffer.Fallback(Byte[], Int32) DecoderFallbackBuffer.Fallback(Byte[], Int32) DecoderFallbackBuffer.Fallback(Byte[], Int32) Method

Definition

When overridden in a derived class, prepares the fallback buffer to handle the specified input byte sequence.

public:
 abstract bool Fallback(cli::array <System::Byte> ^ bytesUnknown, int index);
public abstract bool Fallback (byte[] bytesUnknown, int index);
abstract member Fallback : byte[] * int -> bool
Public MustOverride Function Fallback (bytesUnknown As Byte(), index As Integer) As Boolean

Parameters

bytesUnknown
Byte[]

An input array of bytes.

index
Int32 Int32 Int32 Int32

The index position of a byte in bytesUnknown.

Returns

true if the fallback buffer can process bytesUnknown; false if the fallback buffer ignores bytesUnknown.

Remarks

The Encoding.GetChars, Encoding.GetString, and Decoder.Convert methods call Fallback if they encounter an unknown input byte sequence that cannot be decoded. A return value of true indicates that the fallback buffer can process the input byte sequence, which causes the calling method to call the GetNextChar method to obtain each character of the fallback buffer. Because it does not process individual bytes, the Fallback method in an exception fallback handler throws an exception.

Applies to