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DbDataReader.GetFieldValue(Of T) Method

.NET Framework 4.5

Synchronously gets the value of the specified column as a type.

Namespace:  System.Data.Common
Assembly:  System.Data (in System.Data.dll)

'Declaration
Public Overridable Function GetFieldValue(Of T) ( _
	ordinal As Integer _
) As T

Type Parameters

T

Synchronously gets the value of the specified column as a type.

Parameters

ordinal
Type: System.Int32

The column to be retrieved.

Return Value

Type: T
The column to be retrieved.

ExceptionCondition
InvalidOperationException

The connection drops or is closed during the data retrieval.

The SqlDataReader is closed during the data retrieval.

There is no data ready to be read (for example, the first Read hasn't been called, or returned false).

Tried to read a previously-read column in sequential mode.

There was an asynchronous operation in progress. This applies to all Get* methods when running in sequential mode, as they could be called while reading a stream.

IndexOutOfRangeException

Trying to read a column that does not exist.

InvalidCastException

T doesn’t match the type returned by SQL Server or cannot be cast.

For more information, see SqlClient Streaming Support.

.NET Framework

Supported in: 4.5.2, 4.5.1, 4.5

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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