GetTdBlob Method

Gets the value of the specified field (column) as a TdBlob object.

Syntax

'Declaration
 
Public Function GetTdBlob( _
   ByVal ordinal As Integer _
) As TdBlob

'Usage
 
Dim instance As TdDataReader
Dim ordinal As Integer
Dim value As TdBlob
 
value = instance.GetTdBlob(ordinal)

public TdBlob GetTdBlob( 
   int ordinal
)

public:
TdBlob^ GetTdBlob( 
   int ordinal
)

Returns the value of the specified field represented as a TdBlob type.

Exceptions

Exception	Description
System.IndexOutOfRangeException	ordinal is less than zero or ordinal is equal to or greater than TdDataReader.FieldCount.
System.InvalidCastException	The field cannot be converted into TdBlob.
System.InvalidOperationException	CommandBehavior is set to SchemaOnly, or there is no data for the row or column, or preceding columns are no longer accessible.
System.ObjectDisposedException	The TdDataReader is closed.
TdException	The Advanced SQL Engine returned an error, or .NET Data Provider for Teradata detected an error.

Remarks

Use this method to retrieve columns of type BLOB only when using Default command behavior.

Requirements

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