PromptDialog.Choice - 无效类型异常

Question

我在尝试使用 PromptDialog.Choice 时收到无效类型异常。这是我的对话中的代码：

 public async Task StartAsync(IDialogContext context) {
  await context.PostAsync(ConversationHelper.CreateReschedulePromptMessage());
  context.Wait(MessageReceivedAsync);
}

public virtual async Task MessageReceivedAsync(IDialogContext context, IAwaitable<IMessageActivity> result) {
  var message = await result;
  var Options = new[] { "Location", "Date and Time", "Both" };

  if (message.Text.ToUpper().CompareTo("PICKUP") == 0) {
    _rescheduleType = "pickup";
    string prompt = string.Format("Is the {0} location incorrect, is the date and time incorrect, or both?", _rescheduleType);
    PromptDialog.Choice(context, OnResumeFromRescheduleChoice, Options, prompt, promptStyle: PromptStyle.Auto, descriptions: Options);
  }
  else if (message.Text.ToUpper().CompareTo("DROP") == 0) {
    _rescheduleType = "drop-off";
    string prompt = string.Format("Is the {0} location incorrect, is the date and time incorrect, or both?", _rescheduleType);
    PromptDialog.Choice(context, OnResumeFromRescheduleChoice, Options, prompt, promptStyle: PromptStyle.Auto, descriptions: Options);
  }
  else {
    await context.PostAsync(ConversationHelper.CreateGenericRescheduleMessage(SUPPORTNUMBER));
  }

  context.Done<object>(null);
}

private async Task OnResumeFromRescheduleChoice(IDialogContext context, IAwaitable<string> result) {
  var choice = await result;
}

OnResumeFromRescheduleChoice 方法正在触发，但结果显示失败，因为 ResumeAfter 委托需要字符串类型，但正在接收对象。这是对 PromptDialog 的错误使用吗？也不会提示用户选择。我正在使用 Bot.Builder 版本 3.5.5。

Answer 1

将 context.Done<object>(null); 调用移到 else 子句中。你不能在触发 Prompt.

后调用 context.Done

PromptDialog.Choice - 无效类型异常

PromptDialog.Choice - Invalid Type Exception

bots

botframework