DB2DataReader.GetBytes Method

Syntax

[Visual Basic]
Public Function GetBytes( _
   ByVal i As Integer, _
   ByVal dataIndex As Long, _
   ByVal buffer() As Byte, _
   ByVal bufferIndex As Integer, _
   ByVal length As Integer _
) As Long
[C#]
public long GetBytes(
   int i,
   long dataIndex,
   byte[] buffer,
   int bufferIndex,
   int length
);
[C++]
public: __int64 GetBytes(
   int i,
   __int64 dataIndex,
   unsigned char buffer __gc[],
   int bufferIndex,
   int length
);
[JScript]
public function GetBytes(
   i : int,
   dataIndex : long,
   buffer : Byte[],
   bufferIndex : int,
   length : int
) : long;

Parameters

i

The zero-based column ordinal.

dataIndex

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

buffer

The buffer into which to read the stream of bytes.

bufferIndex

The index where buffer is to begin the write operation.

length

The number of bytes to read.

Return value

The actual number of bytes read.

Exceptions

Remarks

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 DB2®DataReader is reading a BLOB into a buffer. For more information, see the SequentialAccess setting of System.Data.CommandBehavior in the Microsoft(R) .NET Framework SDK documentation.

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