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SqlDataReader.GetBytes Method

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

Namespace:  System.Data.SqlClient
Assembly:  System.Data (in System.Data.dll)
public override long GetBytes(
	int i,
	long dataIndex,
	byte[] buffer,
	int bufferIndex,
	int length
)

Parameters

i
Type: System.Int32

The zero-based column ordinal.

dataIndex
Type: System.Int64

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

buffer
Type: System.Byte[]

The buffer into which to read the stream of bytes.

bufferIndex
Type: System.Int32

The index within the buffer where the write operation is to start.

length
Type: System.Int32

The maximum length to copy into the buffer.

Return Value

Type: System.Int64
The actual number of bytes read.

Implements

IDataRecord.GetBytes(Int32, Int64, Byte[], Int32, Int32)

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, if the SqlDataReader 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 null, GetBytes returns the length of the entire field in bytes, not the remaining size based on the buffer offset parameter.

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

.NET Framework

Supported in: 4.5.1, 4.5, 4, 3.5, 3.0, 2.0, 1.1, 1.0

.NET Framework Client Profile

Supported in: 4, 3.5 SP1

Windows Phone 8.1, Windows Phone 8, Windows 8.1, Windows Server 2012 R2, Windows 8, Windows Server 2012, Windows 7, Windows Vista SP2, Windows Server 2008 (Server Core Role not supported), Windows Server 2008 R2 (Server Core Role supported with SP1 or later; Itanium not supported)

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

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