如何将按钮添加到HeroCard并在单击时选择值

private async Task ShowSessionsHeroCard(IDialogContext context)
    {
        var replyToConversation = context.MakeMessage();
        replyToConversation.AttachmentLayout = AttachmentLayoutTypes.Carousel;
        replyToConversation.Attachments = await GetSessionHeroCard(context);
        //replyToConversation.Attachments.Add(GetSessionHeroCard());
        await context.PostAsync(replyToConversation);
    }

    private async Task<List<Attachment>> GetSessionHeroCard(IDialogContext context)
    {
        List<Attachment> list = new List<Attachment>();
        List<CardAction> cardButtons = new List<CardAction>();
        foreach (var sessionDetails in scheduleList)
        {
            string[] session = GetSplittedDetails(sessionDetails);

            hospitalName = session[0]; //Hospital Name: {0}
            availableDay = session[1]; //Available Day: {1}
            appointmentNo = session[2]; // Appoinment No: {2}
            sessionAvailable = session[3]; // Session: {3}

            HeroCard hero = new HeroCard()
            {
                Title = hospitalName,
                Subtitle = availableDay,
                Text = sessionAvailable + appointmentNo,
                Buttons = cardButtons
            };

            list.Add(hero.ToAttachment());

        }

        CardAction getSessionValues = new CardAction()
        {
            Value = hospitalName + availableDay + sessionAvailable + appointmentNo,
            Type = ActionTypes.ImBack,
            Title = " Select Appointment "
        };

        cardButtons.Add(getSessionValues);

        string selectedAppointment = getSessionValues.Value.ToString();
        await GetSelectedAppointment(context, selectedAppointment);

        return list;
    }

     private async Task GetSelectedAppointment(IDialogContext context, string sessionSelected)
    {
        var replyToConversation = context.MakeMessage();
        //replyToConversation.AttachmentLayout = AttachmentLayoutTypes.List;

        string[] result = Utility.SplitSelectedApoitmentString(sessionSelected);
        var heroCard = new HeroCard()
        {
            Title = "Appointment Schedule",
            Subtitle = "These are the Appointment Details",
            Text = "Hospital selected : " + result[0] + "\n" + "Day of Appointment : " + result[1] + "\n" + "Time of Appointment : " + result[2] + "\n" + "Appointment Number" + result[3],
        }.ToAttachment();

        Attachment attachment = new Attachment()
        {
            Content = heroCard.Content,
            ContentType = heroCard.ContentType
        };
        replyToConversation.Attachments.Add(attachment);
        await context.PostAsync(replyToConversation);

    }

1. 我是否正确定义了按钮?
2. CardAction getSessionValues甚至在我单击之前就获得了一些值 在按钮上。如何避免这种情况。

我想不出这里出了什么问题,请帮忙。(我肯定我做的事情很愚蠢。)

提前感谢:)