DecoderFallbackBuffer

Provides a buffer that allows a fallback handler to return an alternate string to a decoder when it cannot decode an input byte sequence.

Public:

Properties:

Name	Description
Remaining (get)	When implemented by a class, gets the number of characters in the current DecoderFallbackBuffer object that remain to be processed.

Methods:

Name	Description
Equals	Determines whether the specified value passed in is equal to the current object.
Fallback	When implemented by a class, prepares the fallback buffer to handle the specified input byte sequence.
GetHashCode	Serves as the default hash function.
GetNextChar	When implemented by a class, retrieves the next character in the fallback buffer.
MovePrevious	When implemented by a class, causes the next call to the GetNextChar method to access the data buffer character position that is prior to the current character position.
Reset	Initializes all data and state information pertaining to this fallback buffer.
ToString	Returns a string that represents the current object.

Remarks

An encoding defines a mapping between a Unicode character and an encoded sequence of bytes. A decoding operation, which converts an input byte sequence to an output character, fails if no mapping is defined for a particular byte sequence.

VBCorLib provides a failure handling mechanism, called a fallback, if a conversion cannot be performed. All decoder fallback handlers must implement the following:

A decoder fallback, which is represented by a class that implements the DecoderFallback interface.
A decoder fallback buffer, which is represented by a type that implements the DecoderFallbackBuffer interface that can return a string to the conversion operation.