如何在 Bot Framework 中从 RootDialog 转发到 LuisDialog

Question

我正在为 FAQ 创建一个机器人。当机器人开始对话时，会发送一个带有 2 个选项的 PromptDialog：英语、法语。

我想在用户选择英语按钮时将对话框转发给 EnglishLuis，在选择法语时转发给 FrenchLuis。

这是我的代码：

Rootdialog.cs

public class RootDialog : IDialog<object>
{
    private const string EnglishMenu = "English";
    private const string FrenchMenu = "French";
    private const string QAMenu = "Q&A";

    private List<string> mainMenuList = new List<string>() { EnglishMenu, FrenchMenu, QAMenu };
    private string location;

    public async Task StartAsync(IDialogContext context)
    {
        await context.PostAsync("Welcome to Root Dialog");
        context.Wait(MessageReceiveAsync);
    }

    private async Task MessageReceiveAsync(IDialogContext context, IAwaitable<IMessageActivity> result)
    {
        var reply = await result;
        if (reply.Text.ToLower().Contains("help"))
        {
            await context.PostAsync("You can implement help menu here");
        }
        else
        {
            await ShowMainmenu(context);
        }
    }

    private async Task ShowMainmenu(IDialogContext context)
    {
        //Show menues
        PromptDialog.Choice(context, this.CallDialog, this.mainMenuList, "What do you want to do?");
    }

    private async Task CallDialog(IDialogContext context, IAwaitable<string> result)
    {
        //This method is resume after user choise menu
       // this.luisResult = result;
       // var message = await result;
        var selectedMenu = await result;
        var message = await result;
        switch (selectedMenu)
        {
            case EnglishMenu:
                //Call child dialog without data
               //  context.Call(new EnglishLuis(),ResumeAfterDialog);
                //  context.Call(new EnglishLuis(), ResumeAfterDialog);

               await Conversation.SendAsync(context.MakeMessage(), () => new EnglishLuis());
                break;
            case FrenchMenu:
                //Call child dialog with data
                context.Call(new HotelDialog(location), ResumeAfterDialog);
                break;
            case QAMenu:
                context.Call(new LuisCallDialog(),ResumeAfterDialog);
                break;
        }

    }



    private async Task ResumeAfterDialog(IDialogContext context, IAwaitable<object> result)
    {
        //Resume this method after child Dialog is done.
        var test = await result;
        if (test != null)
        {
            location = test.ToString();
        }
        else
        {
            location = null;
        }
        await this.ShowMainmenu(context);
    }
}

}

英文Luis.cs：

 public class EnglishLuis : LuisDialog<object>
{
    private string location;



    //   string message = $"welcome to english dialog";

    public async Task None(IDialogContext context, LuisResult result)
    {
        string message = $"Sorry, I did not understand '{result.Query}'. Please try again";

        await context.PostAsync(message);

        context.Wait(this.MessageReceived);
        context.Done(true);
    }


    [LuisIntent("gretting")]
    [LuisIntent("intentfr")]
    public async Task Greeting(IDialogContext context, IAwaitable<IMessageActivity> activity, LuisResult result)
    {


        await context.PostAsync("Welcome :) ");


        context.Wait(MessageReceived);
        context.Done(true);
    }



    [LuisIntent("test")]
    public async Task test(IDialogContext context, IAwaitable<IMessageActivity> activity, LuisResult result)
    {
        await context.PostAsync("Do you want to test our bot ? We suggest to type : hi or who are you, help etc..");
        // context.Done(true);
        context.Wait(MessageReceived);
        context.Done(true);
    }

我的问题是，当我选择英语（甚至法语）时，我收到了这个错误：向你的机器人发送此消息时出错：HTTP 状态代码 InternalServerError

你能帮我如何启动 luis dialog 吗？ P.S 如果我直接从 MessagesController.cs 开始效果很好......但我的意图是让人们在两种语言之间进行选择。

我尝试使用以下方法调用 luis：await context.Forward(new EnglishLuis(), ResumeAfterDialog, message, CancellationToken.None);但没有结果。

新文件 RootDialog.cs（更新）：

   using System;
   using System.Collections.Generic;
   using System.Threading.Tasks;
    using Microsoft.Bot.Builder.Dialogs;
   using Microsoft.Bot.Connector;
    using System.Threading;

   namespace TeamsBot.Dialogs
    {
[Serializable]
public class RootDialog : IDialog<object>
{
    private const string EnglishMenu = "English";
    private const string FrenchMenu = "French";
    private const string QAMenu = "Q&A";

    private List<string> mainMenuList = new List<string>() { EnglishMenu, 
        FrenchMenu, QAMenu };
    private string location;

    private string originalMessage;

    public async Task StartAsync(IDialogContext context)
    {
        await context.PostAsync("Welcome to Root Dialog");
        context.Wait(MessageReceiveAsync);
    }

    private async Task MessageReceiveAsync(IDialogContext context, 
     IAwaitable<IMessageActivity> result)
    {
        var reply = await result;

        this.originalMessage = reply.Text;




        if (reply.Text.ToLower().Contains("help"))
        {
            await context.PostAsync("You can implement help menu here");
        }
        else
        {
            await ShowMainmenu(context);
        }
    }

    private async Task ShowMainmenu(IDialogContext context)
    {
        //Show menues
        PromptDialog.Choice(context, this.CallDialog, this.mainMenuList, 
   "What do you want to do?");
    }

    private async Task CallDialog(IDialogContext context, IAwaitable<string> 
    result)
    {

        var selectedMenu = await result;
        switch (selectedMenu)
        {
            case EnglishMenu:
                //Call child dialog without data
                var newMessage = context.MakeMessage();
                newMessage.Text = reply.Text; 
                 await context.Forward(new EnglishLuis(), ResumeAfterDialog, newMessage, CancellationToken.None);
                break;
            case FrenchMenu:
                //Call child dialog with data
                //   context.Call(new HotelDialog(location), ResumeAfterDialog);

                var frenchLuis = new FrenchLuis();
                var messageToForward = await result;
             //   await context.Forward(new FrenchLuis(), ResumeAfterDialog, messageToForward, CancellationToken.None);
                break;
            case QAMenu:
                context.Call(new LuisCallDialog(),ResumeAfterDialog);
                break;
        }

    }



    private async Task ResumeAfterDialog(IDialogContext context, IAwaitable<object> result)
    {
        //Resume this method after child Dialog is done.
        var test = await result;
        if (test != null)
        {
            location = test.ToString();
        }
        else
        {
            location = null;
        }
        await this.ShowMainmenu(context);
    }
}

}

Answer 1

首先，做

context.Wait(this.MessageReceived);
context.Done(true);

这是错误的。您需要选择：或者您在EnglishDialog 中等待新消息，或者您结束EnglishDialog（使用Done）

然后，您尝试在context.Forward 中发送一个字符串，并且您需要转发一个IMessageActivity。而且我怀疑您想发送原始消息，因此您需要将其保存在全局变量中，然后再继续提示。尝试：

var newMessage = context.MakeMessage();
newMessage.Text = this.originalMessageText //the variable that contains the text of the original message that you will have to save at MessageReceiveAsync
await context.Forward(new EnglishLuis(), ResumeAfterDialog, newMessage, CancellationToken.None);


MessageReceivedAsync in RootDialog should looks like:

 private async Task MessageReceiveAsync(IDialogContext context, IAwaitable<IMessageActivity> result)
    {
        var reply = await result;
        if (reply.Text.ToLower().Contains("help"))
        {
            await context.PostAsync("You can implement help menu here");
        }
        else
        {
            this.originalMessage = reply.Text;
            await ShowMainmenu(context);
        }
    }

Answer 2

这就是我将如何实现您调用不同对话框的方法。我倾向于使用对话框的依赖注入，所以我不必不断地更新它们。

private async Task CallDialog(IDialogContext context, IAwaitable<string> result)
{
    //These two variables will be exactly the same, you only need one     
    //var selectedMenu = await result;
    var message = await result;
    switch (selectedMenu)
    {
        case EnglishMenu:
            // Forward the context to the new LuisDialog to bring it to the top of the stack.  
            // This will also send your message to it so it gets processed there.
            await context.Forward<object>(new EnglishLuis(), ResumeAfterDialog, message , CancellationToken.None);
            break;
        case FrenchMenu:
             await context.Forward<object>(new HotelDialog(location), ResumeAfterDialog, message , CancellationToken.None);
            break;
        case QAMenu:
             await context.Forward<object>(new LuisCallDialog(), ResumeAfterDialog, message , CancellationToken.None);
            context.Call(new LuisCallDialog(),ResumeAfterDialog);
            break;
    }

}

在您使用的 EnglishLuis 对话框中存在问题：

context.Wait(this.MessageReceived);
context.Done(true);

问题是这两行在通过对话框时都会执行。 context.Done 将导致此对话框离开堆栈，因此您最终将转到上一个对话框，这与您尝试等待响应的事实相冲突。

实际上不应该有上下文。除非您想返回上一个对话框，否则在您的 luis 对话框中完成。因此，如果您选择使用 context.Done ，则可以将其放在 resumeAfter 方法中并具有适当的条件，或者在退出程序这一部分的单一意图下。

您没有包含堆栈跟踪，但在使用 Luis 时可能会导致问题的是，如果您使用的是来自美国以外地区的堆栈跟踪。在这种情况下，您需要相应地设置域指向正确 Luis 服务的属性。

public EnglishLuis(ConstructorParameters parameters) 
    : base(new LuisService(new LuisModelAttribute(
        "<AppId>",
        "<SubscriptionKey>",
        domain: "westeurope.api.cognitive.microsoft.com")))
    {
        // Constructor Stuff...
    }