c# - 未确定数量的问题的 PromptDialog

Question

我正在尝试编写一个允许用户创建请求的机器人（例如，我想买一件 T 恤或者我想修理我的电脑）。根据他们选择的请求，他们将被问到与该请求相关的一系列问题；这些问题与他们选择的请求直接相关。目前我正在尝试遍历这个问题列表并使用 PromptDialog.Text 方法来获得答案。但是，这只会询问列表中的最后一个问题，当给出答案时，我会收到一个无效需要的错误：预期等待，已完成作为消息。

private async Task ListOfferings(IDialogContext context, IAwaitable<string>  result)
{
   string name = await result;
   var offerings = Offerings.Where((x) =>          
      CultureInfo.CurrentCulture.CompareInfo.IndexOf(x.Name, name, 
      CompareOptions.IgnoreCase) >= 0
   );
   if (offerings.Count() != 0)
   {
      PromptDialog.Choice(context, CreateOffering, offerings, "Which of these would you like?");
   }
   else
   {
      await context.PostAsync(string.Format("Could not find an offering with name {0}", name));
      context.Wait(MessageReceived);
   }
}


private async Task CreateOffering(IDialogContext context, IAwaitable<Offering> result)
{
   var offering = result.GetAwaiter().GetResult();
   await context.PostAsync(string.Format("***CREATING {0}***", offering.Name.ToUpper()));

   foreach (var question in offering.Questions)
   {
      PromptDialog.Text(context, null, question.Question);
   }
}

是否有可能做这样的事情，我想动态地决定用户在运行时会被问到的问题，还是我需要采取更静态的脚本化方法？

Answer 1

您不能只 PromptDialog.Text在一个循环中进行多次调用，因为您必须在每个问题后等待用户回复。尝试这样做：

private int questionNumber;
private Offering offering;

private async Task CreateOffering(IDialogContext context, IAwaitable<Offering> result)
{
    offering = await result;
    await context.PostAsync($"***CREATING {offering.Name.ToUpper()}***");
    questionNumber = 0;
    // fix access to a particular question in case Questions is not an IList
    PromptDialog.Text(context, OnQuestionReply, offering.Questions[questionNumber].Question);
}

private async Task OnQuestionReply(IDialogContext context, IAwaitable<string> result)
{
    var answer = await result;
    // handle the answer for questionNumber as you need

    questionNumber++;
    // use Count instead of Length in case it is not an array
    if (questionNumber < offering.Questions.Length)
    {
        PromptDialog.Text(context, OnQuestionReply, offering.Questions[questionNumber].Question);
    }
    else
    {
        // do what you need when all the questions are answered
        await context.PostAsync("I have no more questions for this offering.");
        context.Wait(MessageReceived);
    }
}