NextResultAsync(CancellationToken) Method
In This Topic
This is the asynchronous version of System.Data.Common.DbDataReader.NextResult. Providers should override with an appropriate implementation. The may optionally be ignored. The default implementation invokes the synchronous System.Data.Common.DbDataReader.NextResult method and returns a completed task, blocking the calling thread. The default implementation will return a cancelled task if passed an already cancelled . Exceptions thrown by System.Data.Common.DbDataReader.NextResult will be communicated via the returned Task Exception property. Other methods and properties of the DbDataReader object should not be invoked while the returned Task is not yet completed. Advances the reader to the next result when reading the results of a batch of statements.
Syntax
'Declaration
<System.Runtime.CompilerServices.AsyncStateMachineAttribute(VistaDB.Provider.VistaDBDataReader/d__68)>
Public Overloads Overrides NotOverridable Function NextResultAsync( _
ByVal As System.Threading.CancellationToken _
) As System.Threading.Tasks.Task(Of Boolean)
'Usage
Dim instance As VistaDBDataReader
Dim cancellationToken As System.Threading.CancellationToken
Dim value As System.Threading.Tasks.Task(Of Boolean)
value = instance.NextResultAsync(cancellationToken)
[System.Runtime.CompilerServices.AsyncStateMachine(VistaDB.Provider.VistaDBDataReader/d__68)]
public override System.Threading.Tasks.Task<bool> NextResultAsync(
System.Threading.CancellationToken
)
Parameters
- cancellationToken
- The cancellation instruction.
Return Value
A task representing the asynchronous operation.This method allows you to process multiple result sets returned when a batch is submitted to the data provider.
Exceptions
| Exception | Description |
| System.Data.Common.DbException | An error occurred while executing the command text. |
Example
See
VistaDBDataReader Class for an example of how to use this method.
Requirements
Target Platforms: Windows 7, Windows Vista SP1 or later, Windows XP SP3, Windows Server 2008 (Server Core not supported), Windows Server 2008 R2 (Server Core supported with SP1 or later), Windows Server 2003 SP2
See Also