UnhandledExceptionAction UnhandledExceptionAction UnhandledExceptionAction UnhandledExceptionAction Enum

Definición

Especifica la acción que se produce cuando escapa una excepción de la raíz de un flujo de trabajo.Specifies the action that occurs when an exception escapes the root of a workflow.

public enum class UnhandledExceptionAction
public enum UnhandledExceptionAction
type UnhandledExceptionAction = 
Public Enum UnhandledExceptionAction
Herencia
UnhandledExceptionActionUnhandledExceptionActionUnhandledExceptionActionUnhandledExceptionAction

Campos

Abort Abort Abort Abort 0

Especifica que la clase WorkflowApplication debe anular el flujo de trabajo.Specifies that the WorkflowApplication should abort the workflow.

Cancel Cancel Cancel Cancel 1

Especifica que la clase WorkflowApplication debe programar la cancelación de la actividad raíz y reanudar la ejecución.Specifies that the WorkflowApplication should schedule the cancellation of the root activity and resume execution.

Terminate Terminate Terminate Terminate 2

Especifica que la clase WorkflowApplication debe programar la terminación de la actividad raíz y reanudar la ejecución.Specifies that the WorkflowApplication should schedule termination of the root activity and resume execution.

Ejemplos

En el ejemplo siguiente se invoca un flujo de trabajo que produce una excepción.The following example invokes a workflow that throws an exception. El flujo de trabajo no controla la excepción y se invoca el controlador de la propiedad OnUnhandledException.The exception is unhandled by the workflow and the OnUnhandledException handler is invoked. El objeto WorkflowApplicationUnhandledExceptionEventArgs se inspecciona para proporcionar información acerca de la excepción y se termina el flujo de trabajo.The WorkflowApplicationUnhandledExceptionEventArgs are inspected to provide information about the exception, and the workflow is terminated.

Activity wf = new Sequence
{
    Activities =
     {
         new WriteLine
         {
             Text = "Starting the workflow."
         },
         new Throw
        {
            Exception = new InArgument<Exception>((env) => 
                new ApplicationException("Something unexpected happened."))
        },
        new WriteLine
         {
             Text = "Ending the workflow."
         }
     }
};

WorkflowApplication wfApp = new WorkflowApplication(wf);

wfApp.OnUnhandledException = delegate(WorkflowApplicationUnhandledExceptionEventArgs e)
{
    // Display the unhandled exception.
    Console.WriteLine("OnUnhandledException in Workflow {0}\n{1}",
        e.InstanceId, e.UnhandledException.Message);

    Console.WriteLine("ExceptionSource: {0} - {1}",
        e.ExceptionSource.DisplayName, e.ExceptionSourceInstanceId);

    // Instruct the runtime to terminate the workflow.
    return UnhandledExceptionAction.Terminate;
};

wfApp.Aborted = delegate(WorkflowApplicationAbortedEventArgs e)
{
    // Display the exception that caused the workflow
    // to abort.
    Console.WriteLine("Workflow {0} Aborted.", e.InstanceId);
    Console.WriteLine("Exception: {0}\n{1}",
        e.Reason.GetType().FullName,
        e.Reason.Message);
};

wfApp.Completed = delegate(WorkflowApplicationCompletedEventArgs e)
{
    if (e.CompletionState == ActivityInstanceState.Faulted)
    {
        Console.WriteLine("Workflow {0} Terminated.", e.InstanceId);
        Console.WriteLine("Exception: {0}\n{1}",
            e.TerminationException.GetType().FullName,
            e.TerminationException.Message);
    }
    else if (e.CompletionState == ActivityInstanceState.Canceled)
    {
        Console.WriteLine("Workflow {0} Canceled.", e.InstanceId);
    }
    else
    {
        Console.WriteLine("Workflow {0} Completed.", e.InstanceId);

        // Retrieve the outputs of the workflow.
        foreach (var kvp in e.Outputs)
        {
            Console.WriteLine("Name: {0} - Value {1}",
                kvp.Key, kvp.Value);
        }

        // Outputs can be directly accessed by argument name.
        // Console.WriteLine("The winner is {0}.", e.Outputs["Winner"]);
    }
};

wfApp.Run();

Comentarios

La función OnUnhandledException se invoca si una excepción escapa de la raíz del flujo de trabajo.The OnUnhandledException function is invoked if an exception escapes the root of the workflow. La clase WorkflowApplicationUnhandledExceptionEventArgs proporciona acceso a la excepción, así como un puntero a la clase Activity que generó la excepción.The WorkflowApplicationUnhandledExceptionEventArgs provides access to the exception as well as a pointer to the Activity that generated the exception. Terminate es la acción predeterminada si no hay ningún OnUnhandledException se especificó un controlador.Terminate is the default action if no OnUnhandledException handler is specified.

Se aplica a