嗨，我有这段代码，提示用户输入他们的位置。 我正在使用Botframework v4和C＃。我将Messenger的快速回复放在附件提示中。
if (response == "test location")
{
Activity reply = stepContext.Context.Activity.CreateReply();
reply.ChannelData = JObject.FromObject(
new
{
text = "loc",
quick_replies = new object[]
{
new
{
content_type = "location",
},
},
});
return await stepContext.PromptAsync(
ATTACHPROMPT,
new PromptOptions
{
Prompt = reply,
});
}
但是在用户发送其位置之后。机器人崩溃。我该如何处理位置信息的返回，使机器人不会崩溃？这是例外
System.ArgumentNullException：值不能为null。参数名称：Microsoft.Bot.Builder.AI.Luis.LuisRecognizer.d * 23.MoveNext（）处的讲话---从上次引发异常的位置开始的堆栈跟踪---在System.Runtime.ExceptionServices.ExceptionDispatchInfo处。 System.Runtime.CompilerServices.TaskAwaiter.ThrowForNonSuccess（任务任务）的System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification（任务任务）的Microsoft.Bot.Builder.AI.Luis.LuisRecognizer.d * 10.MoveNext（ ）-从先前抛出异常的位置开始的堆栈跟踪--在System.Runtime.CompilerServices.TaskAwaiter.ThrowForNonSuccess（任务任务）在System.Runtime.CompilerServices的System.Runtime.ExceptionServices.ExceptionDispatchInfo.Throw（） Microsoft.BotBuilderSamples.BasicBot.d * 24.MoveNext（）中的.TaskAwaiter.HandleNonSuccessAndDebuggerNotification（任务任务），位于C：\ Users \ bguevarra \ Desktop \ finko \ FinkoBot \ Bots \ BasicBot.cs：第104行---堆栈结束从exe的先前位置追踪在System.Runtime.CompilerServices.TaskAwaiter.ThrowForNonSuccess（任务任务）在System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification（任务任务）在System.Runtime.ExceptionServices.ExceptionDispatchInfo.Throw（）被抛出了ption .Builder.MiddlewareSet.d * 3.MoveNext（）-从上一个引发异常的位置开始的堆栈跟踪--在System.Runtime.CompilerServices.TaskAwaiter的System.Runtime.ExceptionServices.ExceptionDispatchInfo.Throw（）处。 Microsoft.Bot.Builder.BotAdapter.d__13.MoveNext（）的System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification（任务任务）的ThrowForNonSuccess（任务任务）==对不起，看来有点问题。
OnTurnAsync（）
public async Task OnTurnAsync(ITurnContext turnContext, CancellationToken cancellationToken)
{
var dc = await _dialogs.CreateContextAsync(turnContext, cancellationToken);
var activity = turnContext.Activity;
var userstate = await _basicAccessors.BasicUserStateAccessor.GetAsync(turnContext, () => new BasicUserState(), cancellationToken);
var state = await _basicAccessors.BasicStateAccessor.GetAsync(turnContext, () => new BasicState(), cancellationToken);
if (turnContext.Activity.Type == ActivityTypes.Message)
{
turnContext.TurnState.Add("BasicAccessors", _basicAccessors);
string text = string.IsNullOrEmpty(turnContext.Activity.Text) ? string.Empty : turnContext.Activity.Text.ToLower();
var luisResults = await _services.LuisServices[LuisConfiguration].RecognizeAsync(dc.Context, cancellationToken);
var topScoringIntent = luisResults?.GetTopScoringIntent();
var topIntent = topScoringIntent.Value.intent;
turnContext.TurnState.Add("topIntent", topIntent);
turnContext.TurnState.Add("text", text);
var interrupted = await IsTurnInterruptedAsync(turnContext);
if (interrupted)
{
await _basicAccessors.ConversationState.SaveChangesAsync(turnContext, false, cancellationToken);
await _basicAccessors.UserState.SaveChangesAsync(turnContext, false, cancellationToken);
return;
}
// Continue the current dialog
var dialogResult = await dc.ContinueDialogAsync();
// if no one has responded,
if (!dc.Context.Responded)
{
// examine results from active dialog
switch (dialogResult.Status)
{
case DialogTurnStatus.Empty:
switch (topIntent)
{
case MainDialogIntent:
await dc.BeginDialogAsync(MainDialogId);
break;
case LoanCalculatorIntent:
await dc.BeginDialogAsync(LoanCalculatorId);
break;
case RealEstateIntent:
await dc.BeginDialogAsync(RealEstateDialogId);
break;
case GreetingIntent:
Random rnd = new Random();
int x = rnd.Next(1, 5);
switch (x)
{
case 1:
await dc.Context.SendActivityAsync("Hi!");
break;
case 2:
await dc.Context.SendActivityAsync("Hello!");
break;
case 3:
await dc.Context.SendActivityAsync("Good day!");
break;
default:
break;
}
break;
case NoneIntent: // NoneIntent:
default:
await dc.Context.SendActivityAsync("I didn't understand what you just said to me.");
break;
}
break;
case DialogTurnStatus.Waiting:
// The active dialog is waiting for a response from the user, so do nothing.
break;
case DialogTurnStatus.Complete:
await dc.EndDialogAsync();
break;
default:
await dc.CancelAllDialogsAsync();
break;
}
}
await _basicAccessors.ConversationState.SaveChangesAsync(turnContext, false, cancellationToken);
await _basicAccessors.UserState.SaveChangesAsync(turnContext, false, cancellationToken);
}
else if (activity.Type == ActivityTypes.ConversationUpdate)
{
if (activity.MembersAdded != null)
{
// Iterate over all new members added to the conversation.
foreach (var member in activity.MembersAdded)
{
// Greet anyone that was not the target (recipient) of this message.
// To learn more about Adaptive Cards, see https://aka.ms/msbot-adaptivecards for more details.
if (member.Id != activity.Recipient.Id)
{
await SendWelcomeMessageAsync(turnContext, cancellationToken);
}
}
}
}
await _basicAccessors.ConversationState.SaveChangesAsync(turnContext, false, cancellationToken);
await _basicAccessors.UserState.SaveChangesAsync(turnContext, false, cancellationToken);
}
答案 0 :(得分：1)
当用户单击Facebook Messenger中的位置快速答复时，传入的活动不具有text属性，该属性会在调用LUIS时导致“值不能为null”错误。目前在BotFramework中这是已知的issue，并且开发团队目前正在努力解决此问题。同时，在调用LUIS识别器之前，请检查并确保传入活动的text属性不为null或为空。
if(!string.IsNullOrEmpty(turnContext.Activity.Text)) {
var luisResults = await _services.LuisServices[LuisConfiguration].RecognizeAsync(dc.Context, cancellationToken);
}
希望这会有所帮助！