The bot doesn't understand the value when I use the property Describe

Question

I am using the sample "SandwichOrder" code. When I use the property "Describe" to change the item value the bot doesn't understand the setted value.

public enum LengthOptions
{
    [Describe("Test 1")]
    SixInch = 1,

    [Describe("Test 2")]
    FootLong = 2
};

This is the output:

Answer 1

It's the problem how FormFlow handles the feedback after user's selection, the result is actually right the type of LengthOptions. Since we're not able to modify the source code of BotBuilder SDK, here is a workaround to solve this problem: we try to override the feedback of this item in FormFlow, and here is the code when building the FormDialog:

...
.Field(nameof(Length),
    validate: async (state, response) =>
     {
         var result = new ValidateResult { IsValid = true, Value = response };
         var value = (LengthOptions)response;
         result.Feedback = "Your selection means " + value;
         return result;
     })
...

The Length property in above code can be defined like this:

public enum LengthOptions
{
    [Describe("Test 1")]
    SixInch = 1,

    [Describe("Test 2")]
    FootLong = 2
};

public LengthOptions? Length { get; set; }

Here is the test result:

Answer 2

What @Grace Feng mentioned is one way to do that. Another simpler way would be to add the Terms decoration to LengthOptions each item.

So the code would be :

public enum LengthOptions
    {
        [Terms(new string[] { "Test 1" })]
        [Describe("Test 1")]
        SixInch = 1,

        [Terms(new string[] { "Test 2" })]
        [Describe("Test 2")]
        FootLong = 2
    };

Now your bot will automatically understand the value of "Test 1" as SixInch and "Test 2" as FootLong