c# - How do I cancel/exit or escape from PromptDialog.Choice in Bot Framework?

Question

The PromptDialog.Choice in the Bot Framework display the choice list which is working well. However, I would like to have an option to cancel/escape/exit the dialog with giving cancel/escape/exit optioin in the list. Is there anything in PromptDialog.Choice which can be overridden since i have not found any cancel option.

here is my code in c#..

PromptDialog.Choice(
                 context: context,
                 resume: ChoiceSelectAsync,
                 options: getSoftwareList(softwareItem),
                 prompt: "We have the following software items matching " + softwareItem + ". (1), (2), (3). Which one do you want?:",
                 retry: "I didn't understand. Please try again.",
                 promptStyle: PromptStyle.PerLine);

Example:

Bot: We have the following software items matching Photoshop. (1), (2), (3). Which one do you want

• Version 1
• Version 2
• Version 3

What I want if user enter none of above or a command or number, cancel, exit, that bypasses the options above, without triggering the retry error message.

How do we do that?

Answer 1

There are two ways of achieving this:

1. Add cancel as an option as suggested. While this would definitely work, long term you will find repeating yourself a lot, plus that you will see the cancel option in the list of choices, what may not be desired.
2. A better approach would be to extend the current PromptChoice to add your exit/cancelation logic. The good news is that there is something already implemented that you could use as is or as the base to achieve your needs. Take a look to the CancelablePromptChoice included in the BotBuilder-Samples repository. Here is how to use it.