ReadAsync Method

DbDataReader.ReadAsync Method

.NET Framework 4.6 and 4.5

Implements the asynchronous version of Read, but returns a Task synchronously, blocking the calling thread.

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


An asynchronous version of Read, which advances the reader to the next record in a result set. This method invokes ReadAsync with CancellationToken.None.


This is the asynchronous version of Read. Providers should override with an appropriate implementation. The cancellationToken may optionally be ignored.

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

Do not invoke other methods and properties of the DbDataReader object until the returned Task is complete.

For more information about asynchronous programming, see Asynchronous Programming.

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