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DbDataReader.GetFieldValueAsync<T> Method (Int32)

.NET Framework 4.5

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

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

public Task<T> GetFieldValueAsync<T>(
	int ordinal
)

Type Parameters

T

The type of the value to be returned. See the remarks section for more information.

Parameters

ordinal
Type: System.Int32

The type of the value to be returned.

Return Value

Type: System.Threading.Tasks.Task<T>
The type of the value to be returned.

ExceptionCondition
InvalidOperationException

The connection drops or is closed during the data retrieval.

The DbDataReader 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 the data source or cannot be cast.

T can be one of the following types:

Boolean

Byte

Char

DateTime

DateTimeOffset

Decimal

Double

Float

Guid

Int16

Int32

Int64

String

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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