如何处理 Context.Done(R 值)

Question

我有一个 msbot 聊天对话框，我希望它具有以下行为：

user -> get me some info about GARY
bot -> which gary, (prompt: choice options)
user -> gary peskett
bot -> sure, (hero card with gary's contact details)

我有这个代码

public class CustomerRepository
{
    private IList<Customer> _customerList = new List<Customer>
    {
        new Customer
        {
            Name = "Gary Peskett"
        },
        new Customer
        {
            Name = "Gary Richards"
        },
        new Customer
        {
            Name = "Barry White"
        }
    };

    public async Task<IEnumerable<Customer>> GetAll()
    {
        // usually calls a database (which is why async is on this method)
        return _customerList;
    }
}

public class XDialog : IDialog
{
    private readonly IIntent _intent;
    private readonly CustomerRepository _customerRepository;

    public XDialog(IIntent intent, CustomerRepository customerRepository)
    {
        // An intent is decided before this point
        _intent = intent;
        _customerRepository = customerRepository;
    }

    public async Task StartAsync(IDialogContext context)
    {
        // // An intent can provide parameters
        string name = _intent.Parameters["Name"] as string;
        IEnumerable<Customer> customers = await _customerRepository.GetAll();
        IList<Customer> limitedList = customers.Where(x => x.Name.Contains(name)).ToList();

        if (limitedList.Any())
        {
            if (limitedList.Count > 1)
            {
                PromptDialog.Choice(context, LimitListAgain, limitedList,
                    "Can you specify which customer you wanted?");
            }
            else
            {
                Customer customer = limitedList.FirstOrDefault();
                Finish(context, customer);
            }
        }
        else
        {
            context.Done("No customers have been found");
        }
    }

    private static async Task LimitListAgain(IDialogContext context, IAwaitable<Customer> result)
    {
        Customer customer = await result;
        Finish(context, customer);
    }

    private static void Finish(IDialogContext context, Customer customer)
    {
        HeroCard heroCard = new HeroCard
        {
            Title = customer?.Name
        };

        context.Done(heroCard);
    }
}

我发现通常当我执行 context.Done(STRING) 时，它会输出给用户，这对于结束对话非常有用。由于我想以英雄卡结束，它输出类型名

Microsoft.Bot.Connector.HeroCard

谁能帮忙解释一下使用 context.Done(R value) 的更好方法，或者帮我返回一张英雄卡以结束对话？

对话框正在被调用

Chain.PostToChain()
    .Select(msg => Task.Run(() => _intentionService.Get(msg.ChannelId, msg.From.Id, msg.Text)).Result)
    .Select(intent => _actionDialogFactory.Create(intent)) // returns IDialog based on intent
    .Unwrap()
    .PostToUser();

Answer 1

我认为问题是使用Chain 的副作用。

您可能知道，context.Done 不会向用户返回任何内容，它只是使用提供的值结束当前对话框。

发给用户的帖子实际上发生在Chain 末尾的.PostToUser() 中。现在，通过查看PostToUser's code，我意识到在游戏结束时，它正在执行item.ToString() 中的context.PostAsync，在这种情况下是context.Done 中提供的有效载荷。见this。

一个选项（我还没有测试过），可以使用.Do 而不是.PostToUser() 并手动执行PostToUserDialog 所做的事情，最后通过创建一个新的IMessageActivity 来执行 context.PostAsync()并将HeroCard 添加为附件。