bot.cs

// Copyright (c) Microsoft Corporation. All rights reserved.
// Licensed under the MIT License.

using System;
using System.Collections.Generic;
using System.IO;
using System.Threading;
using System.Threading.Tasks;
using Microsoft.Bot.Builder;
using Microsoft.Bot.Builder.Dialogs;
using Microsoft.Bot.Builder.Dialogs.Choices;
using AdaptiveCards;
using Microsoft.Bot.Schema;
using Newtonsoft.Json;
using System.Linq;

namespace Microsoft.BotBuilderSamples
{
    public class UserProfileDialog : ComponentDialog
    {
       // private readonly IStatePropertyAccessor<UserProfile> _userProfileAccessor;

        public UserProfileDialog(UserState userState)
            : base(nameof(UserProfileDialog))
        {
           // _userProfileAccessor = userState.CreateProperty<UserProfile>("UserProfile");

            // This array defines how the Waterfall will execute.
            var waterfallSteps = new WaterfallStep[]
            {
                TransportStepAsync,
				AskForPhotoAsync,
                NameConfirmStepAsync,
            };

            // Add named dialogs to the DialogSet. These names are saved in the dialog state.
            AddDialog(new WaterfallDialog(nameof(WaterfallDialog), waterfallSteps));
            AddDialog(new TextPrompt(nameof(TextPrompt)));
			AddDialog(new AttachmentPrompt(nameof(AttachmentPrompt)));
            AddDialog(new ChoicePrompt(nameof(ChoicePrompt)) { Style = ListStyle.None });

            // The initial child Dialog to run.
            InitialDialogId = nameof(WaterfallDialog);
        }

        private static async Task<DialogTurnResult> TransportStepAsync(WaterfallStepContext stepContext, CancellationToken cancellationToken)
        {
			Activity reply = stepContext.Context.Activity.CreateReply();
			reply.AttachmentLayout = AttachmentLayoutTypes.Carousel;
			var choices = new[] { "1", "2", "3", "4" };

			var json = File.ReadAllText("RestaurantCard.json");

			for (int i = 1; i < 5; i++)
			{
				var str = json.Replace("{{Value}}", i.ToString());
				var result = AdaptiveCard.FromJson(str);

				Attachment attachment = new Attachment()
				{
					ContentType = AdaptiveCard.ContentType,
					Content = result.Card
				};
				reply.Attachments.Add(attachment);
			}

			return await stepContext.PromptAsync(nameof(ChoicePrompt),
				new PromptOptions
				{
					Choices = ChoiceFactory.ToChoices(choices),
					Prompt = reply
				}, cancellationToken);
		}

		private async Task<DialogTurnResult> AskForPhotoAsync(WaterfallStepContext stepContext, CancellationToken cancellationToken)
		{
			return await stepContext.PromptAsync(nameof(AttachmentPrompt), new PromptOptions
			{
				Prompt = MessageFactory.Text($"Can you upload a file?"),
			});
		}

		private async Task<DialogTurnResult> NameConfirmStepAsync(WaterfallStepContext stepContext, CancellationToken cancellationToken)
        {
            // var selected = ((FoundChoice)stepContext.Result).Value;
			// await stepContext.Context.SendActivityAsync($"You selected {selected}");
			return await stepContext.EndDialogAsync();
        }
    }
}