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。因为我想以一张英雄卡结束，它输出类型名

Microsoft.Bot.Connector.HeroCard

谁能帮忙解释一下使用 context.Done（R 值）的更好方法，或者帮我 return 一张英雄卡来结束对话？

正在使用

调用对话框

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。

如您所知，context.Done 不会 post 返回给用户任何东西，它只是使用提供的值结束当前对话框。

给用户的 post 实际上发生在 Chain 末尾的 .PostToUser() 中。现在，通过查看 PostToUser's code, I realized that at the end of the game, it's doing a context.PostAsync of item.ToString(), being item the payload provided in the context.Done in this case. See 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，最后执行 context.PostAsync() 通过创建一个新的 IMessageActivity 并将 HeroCard 添加为附件。

如何处理Context.Done(R值)

How to deal with Context.Done(R value)

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