OracleDataReader.GetBytes Method

Reads a stream of bytes from the specified column offset into the buffer as an array, starting at the given buffer offset.

Namespace: System.Data.OracleClient
Assembly: System.Data.OracleClient (in

virtual long long GetBytes (
	int i, 
	long long fieldOffset, 
	array<unsigned char>^ buffer2, 
	int bufferoffset, 
	int length
) override
public long GetBytes (
	int i, 
	long fieldOffset, 
	byte[] buffer2, 
	int bufferoffset, 
	int length
public override function GetBytes (
	i : int, 
	fieldOffset : long, 
	buffer2 : byte[], 
	bufferoffset : int, 
	length : int
) : long
Not applicable.



The zero-based column ordinal.


The index within the field where the read operation is to begin.


The buffer into which to read the stream of bytes.


The index where buffer is to begin the write operation.


The number of bytes to read.

Return Value

The actual number of bytes read.

GetBytes returns the number of available bytes in the field. In most cases this is the exact length of the field. However, the number returned may be less than the true length of the field if GetBytes has already been used to obtain bytes from the field. This may be the case, for example, if the OracleDataReader is reading a large data structure into a buffer. For more information, see the SequentialAccess setting of CommandBehavior.

If you pass a buffer that is a null value, GetBytes returns the length of the field in bytes.

Windows 98, Windows Server 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

The Microsoft .NET Framework 3.0 is supported on Windows Vista, Microsoft Windows XP SP2, and Windows Server 2003 SP1.

.NET Framework

Supported in: 3.0, 2.0, 1.1

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