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DbCommand.ExecuteDbDataReaderAsync Method

.NET Framework 4.5

Providers should implement this method to provide a non-default implementation for ExecuteReader overloads.

The default implementation invokes the synchronous ExecuteReader method and returns a completed task, blocking the calling thread. The default implementation will return a cancelled task if passed an already cancelled cancellation token. Exceptions thrown by ExecuteReader will be communicated via the returned Task Exception property.

This method accepts a cancellation token that can be used to request the operation to be cancelled early. Implementations may ignore this request.

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

protected virtual Task<DbDataReader> ExecuteDbDataReaderAsync(
	CommandBehavior behavior,
	CancellationToken cancellationToken


Type: System.Data.CommandBehavior

Options for statement execution and data retrieval.

Type: System.Threading.CancellationToken

The token to monitor for cancellation requests.

Return Value

Type: System.Threading.Tasks.Task<DbDataReader>
A task representing the asynchronous operation.


An error occurred while executing the command text.


An invalid CommandBehavior value.

For more information about asynchronous programming, see Asynchronous Programming.

.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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