protected override void Execute(NativeActivityContext context)
{
ExceptionPersistenceExtension extension = context.GetExtension <ExceptionPersistenceExtension>();
if ((extension != null) && !extension.PersistExceptions)
{
// We will need a NoPersistProperty if we catch an exception.
NoPersistProperty noPersistProperty = context.Properties.FindAtCurrentScope(NoPersistProperty.Name) as NoPersistProperty;
if (noPersistProperty == null)
{
noPersistProperty = new NoPersistProperty(context.CurrentExecutor);
context.Properties.Add(NoPersistProperty.Name, noPersistProperty);
}
}
this.state.Set(context, new TryCatchState());
if (this.Try != null)
{
context.ScheduleActivity(this.Try, new CompletionCallback(OnTryComplete), new FaultCallback(OnExceptionFromTry));
}
else
{
OnTryComplete(context, null);
}
}
void OnExceptionFromTry(NativeActivityFaultContext context, Exception propagatedException, ActivityInstance propagatedFrom)
{
if (propagatedFrom.IsCancellationRequested)
{
if (TD.TryCatchExceptionDuringCancelationIsEnabled())
{
TD.TryCatchExceptionDuringCancelation(this.DisplayName);
}
// The Try activity threw an exception during Cancel; abort the workflow
context.Abort(propagatedException);
context.HandleFault();
}
else
{
Catch catchHandler = FindCatch(propagatedException);
if (catchHandler != null)
{
if (TD.TryCatchExceptionFromTryIsEnabled())
{
TD.TryCatchExceptionFromTry(this.DisplayName, propagatedException.GetType().ToString());
}
context.CancelChild(propagatedFrom);
TryCatchState state = this.state.Get(context);
// If we are not supposed to persist exceptions, enter our noPersistScope
ExceptionPersistenceExtension extension = context.GetExtension <ExceptionPersistenceExtension>();
if ((extension != null) && !extension.PersistExceptions)
{
NoPersistProperty noPersistProperty = (NoPersistProperty)context.Properties.FindAtCurrentScope(NoPersistProperty.Name);
if (noPersistProperty != null)
{
// The property will be exited when the activity completes or aborts.
noPersistProperty.Enter();
}
}
state.CaughtException = context.CreateFaultContext();
context.HandleFault();
}
}
}
