'Declaration
 
Public Overloads Overrides NotOverridable Function GetBytes( _
   ByVal ordinal As Integer, _
   ByVal dataOffset As Long, _
   ByVal buffer() As Byte, _
   ByVal bufferOffset As Integer, _
   ByVal length As Integer _
) As Long

'Usage
 
Dim instance As TdDataReader
Dim ordinal As Integer
Dim dataOffset As Long
Dim buffer() As Byte
Dim bufferOffset As Integer
Dim length As Integer
Dim value As Long
 
value = instance.GetBytes(ordinal, dataOffset, buffer, bufferOffset, length)

public override long GetBytes( 
   int ordinal,
   long dataOffset,
   byte[] buffer,
   int bufferOffset,
   int length
)

public:
int64 GetBytes( 
   int ordinal,
   int64 dataOffset,
   array<byte>^ buffer,
   int bufferOffset,
   int length
) override 

Parameters

ordinal

Column ordinal (see TdDataReader.GetOrdinal).

dataOffset

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

buffer

The buffer into which to copy the field.

bufferOffset

The index for the buffer to begin the copy operation.

length

The maximum length to copy into the buffer.

Return Value

Use this method to retrieve columns of type BYTE, VARBYTE or BLOB. GetBytes method supports the concept of chunking. Applications can call GetBytes method to retrieve the field in smaller manageable chunks. For example a 10 MB BLOB field can be retrieved in 32KB chunks. The number of bytes copied into the buffer can be less than the length specified.

A null buffer reference should be passed to retrieve the size of the field, as opposed to the maximum size of the column retrieved using the GetSchemaTable method.

Target Platforms: Windows 8.1, Windows 10, Windows Server 2012 R2, Windows Server 2016, Windows Server 2019

Reference

TdDataReader Class
TdDataReader Members
Overload List