c# - Microsoft Bot Framework 在本地工作，但在远程失败

Question

我有一个相当复杂的机器人，但它可以在本地运行。但一旦我发布它，它就会失败并出现错误:

Sorry, my bot code is having an issue.

我尝试使用 Application Insights，但它没有显示错误详细信息。错误总是发生在同一点:

/// <summary>
/// Start our response
/// </summary>
/// <param name="context">The current context</param>
/// <returns></returns>
public async Task StartAsync(IDialogContext context)
{

    // Get our current step
    _groups = await _groupProvider.ListAsync();
    _group = _groups.First();

    // Post the question header
    await context.PostAsync(_group.Text);

    // Wait for the users response
    context.Wait(AskQuestion);
}

/// <summary>
/// When our message is recieved we execute this delegate
/// </summary>
/// <param name="context">The current context</param>
/// <param name="result">The result object</param>
/// <returns></returns>
private async Task AskQuestion(IDialogContext context, IAwaitable<IMessageActivity> result)
{

    // Get our question and answers
    var question = this._group.Questions[_currentQuestion];
    var questionText = question.Text;
    var answers = question.Answers.Select(m => m.Text).ToList();
    var answerCount = question.Answers.Count;

    // Create our options
    var options = new PromptOptions<string>(questionText, options: answers);

    // Ask our question
    Choice<string>(context, GetAnswer, options);
}

/// <summary>
/// Get our answer and decide what to do next
/// </summary>
/// <param name="context">The current context</param>
/// <param name="result">The answer text</param>
/// <returns></returns>
private async Task GetAnswer(IDialogContext context, IAwaitable<string> result)
{

    // Get our quest
    var questions = _group.Questions;
    var length = questions.Count;
    var question = _group.Questions[_currentQuestion];
    var selectedAnswer = await result;

    // Assign our answer to our question
    foreach (var answer in question.Answers)
        if (answer.Text == selectedAnswer)
            question.Answer = answer;

    // If we have an answer, filter the products
    if (question.Answer != null)
        _productProvider.Score(await GetCurrentProducts(), _groups);

    // Increase our index
    _currentQuestion++;

    // If our current index is greater or equal than the length of the questions
    if (_currentQuestion == length)
    {

        // Create our dialog
        var dialog = _dialogFactory.CreateSecondStepDialog(_dialogFactory, _groupProvider, _questionProvider, _productProvider, await GetCurrentProducts());

        // Otherwise, got to the next step
        await context.Forward(dialog, ResumeAfter, new Activity { }, CancellationToken.None);
        return;
    }

    // Ask our next question
    await AskQuestion(context, null);
}

因此，当此对话框启动时，它会将问题介绍发布给客户端。然后我调用 context.Wait 并提出问题。问题是一个选择。我相信这就是问题所在，因为它总是在问题出现时立即抛出该消息。

有人能从代码中发现任何明显的东西吗？

Answer 1

您引用的错误消息是在您的机器人抛出 500 时给出的。查看您的代码，我猜测您有一个 null ref 异常。在“//获取我们的问题和答案”下的部分中，尝试检查group.Questions是否不为空，以及_currentQuestion是否是该数组的有效索引。