GetTextReader Method

Gets the value of the specified field (column) as a IO.TextReader.

Syntax

Visual Basic
C#
C++/CLI

'Declaration
 
Public Overrides NotOverridable Function GetTextReader( _
   ByVal ordinal As Integer _
) As TextReader

'Usage
 
Dim instance As TdDataReader
Dim ordinal As Integer
Dim value As TextReader
 
value = instance.GetTextReader(ordinal)

public override TextReader GetTextReader( 
   int ordinal
)

public:
TextReader^ GetTextReader( 
   int ordinal
) override

Parameters

ordinal: Column ordinal (see TdDataReader.GetOrdinal).

Return Value

Returns the value of the specified field represented as a TextReader 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 is null or cannot be converted into a TextReader.
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 Teradata Database returned an error, or .NET Data Provider for Teradata detected an error.

Remarks

Use this method to retrieve columns of type CLOB, JSON, Char or VarChar. This method may be used with either SequentialAccess or Default command behaviour.

The TextReader will be disposed when you read another column, row or result set.

Requirements

Target Platforms: Windows 7, Windows 8, Windows 8.1, Windows 10, Windows Server 2008, Windows Server 2008 R2, Windows Server 2012, Windows Server 2012 R2

Reference

TdDataReader Class
TdDataReader Members