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OleDbDataReader.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.OleDb
Assembly: System.Data (in system.data.dll)

public override long GetBytes (
	int ordinal,
	long dataIndex,
	byte[] buffer,
	int bufferIndex,
	int length
)
public long GetBytes (
	int ordinal, 
	long dataIndex, 
	byte[] buffer, 
	int bufferIndex, 
	int length
)
public override function GetBytes (
	ordinal : int, 
	dataIndex : long, 
	buffer : byte[], 
	bufferIndex : int, 
	length : int
) : long

Parameters

ordinal

The zero-based column ordinal.

dataIndex

The index within the field from which to start the read operation.

buffer

The buffer into which to read the stream of bytes.

bufferIndex

The index for buffer to start the write operation.

length

The maximum length to copy into the buffer.

Return Value

The actual number of bytes read.

GetBytes returns the number of available bytes in the field. Most of the time 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, when the OleDbDataReader is reading a large data structure into a buffer. For more information, see the SequentialAccess setting for CommandBehavior.

If you pass a buffer that is a null reference (Nothing in Visual Basic), GetBytes returns the length of the field in bytes.

No conversions are performed; therefore, the data retrieved must already be a byte array.

Windows 98, Windows 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 .NET Framework does not support all versions of every platform. For a list of the supported versions, see System Requirements.

.NET Framework

Supported in: 2.0, 1.1, 1.0

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