This is the asynchronous version of System.Data.Common.DbCommand.ExecuteScalar. Providers should override with an appropriate implementation. The cancellation token may optionally be ignored. The default implementation invokes the synchronous System.Data.Common.DbCommand.ExecuteScalar 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 ExecuteScalar will be communicated via the returned Task Exception property. Do not invoke other methods and properties of the DbCommand object until the returned Task is complete.

'Declaration
 
Public Overloads Function ExecuteScalarAsync( _
   ByVal cancellationToken As System.Threading.CancellationToken _
) As System.Threading.Tasks.Task(Of Object)

'Usage
 
Dim instance As VistaDBCommand
Dim cancellationToken As System.Threading.CancellationToken
Dim value As System.Threading.Tasks.Task(Of Object)
 
value = instance.ExecuteScalarAsync(cancellationToken)

public System.Threading.Tasks.Task<object> ExecuteScalarAsync( 
   System.Threading.CancellationToken cancellationToken
)