How to flag that an exception has been handled in bot code? - botframework

Question

I have a root dialog that creates a child dialog like so...
private async Task MessageReceivedAsync(IDialogContext context, IAwaitable<IMessageActivity> result)
{
var message = await result;
string userName = context.Activity?.From.Name;
var customerForm = new FormDialog<CarValuationDialog>(
new CarValuationDialog(userName),
() => CarValuationDialog.BuildForm(),
FormOptions.PromptInStart);
context.Call(customerForm, FormSubmitted);
}
The FormSubmitted method looks like....
public async Task FormSubmitted(IDialogContext context, IAwaitable<CarValuationDialog> result)
{
try
{
var form = await result;
}
catch (FormCanceledException<CarValuationDialog> e)
{
string reply;
if (e.InnerException == null)
{
reply = e.Message;
}
else
{
reply = e.InnerException.Message;
}
context.Reset();
await context.PostAsync(reply);
}
}
When an exception occurs in the child dialog, the method FormSubmitted is executed and goes into the catch block. However, when that method finishes, I still see the "Sorry my bot had an issue" type message appear to the user.
How can I tell the bot code not to fire the unhandled exception code, I believe is in PostUnhandledExceptionToUser? Is there a flag type property I need to set to true or something?

Answer 1

It looks like you are making the dialog stack empty when you have an exception: you should not have this context.Reset() below:
public async Task FormSubmitted(IDialogContext context, IAwaitable<CarValuationDialog> result)
{
try
{
var form = await result;
}
catch (FormCanceledException<CarValuationDialog> e)
{
string reply;
if (e.InnerException == null)
{
reply = e.Message;
}
else
{
reply = e.InnerException.Message;
}
context.Reset();
await context.PostAsync(reply);
}
}
Remove this line and the next message will be handled by your root dialog

Answer 2

in your message controller in POST method, use defaultifexception
await Conversation.SendAsync(activity, () => new Dialogs.DialogLUIS().DefaultIfException());