c# - Bot Framework Autofac DI - 使用 context.Call() 时传递依赖项

Question

我一直在研究机器人框架，但我只是想知道在使用 context.Call() 时我对 Autofac 的使用是否正确。我应该像这样(如下)将评级服务依赖项从 RootDialog 传递到 ReviewDialog，还是有更好的方法？

context.Call(new ReviewDialog(_ratingService), ChildDialogHasCompleted);

消息 Controller

    [BotAuthentication]
    public class MessagesController : ApiController
    {
        /// <summary>
        /// POST: api/Messages
        /// Receive a message from a user and reply to it
        /// </summary>
        public async Task<HttpResponseMessage> Post([FromBody]Activity activity)
        {
            if (activity.Type == ActivityTypes.Message)
            {
                using (var scope = DialogModule.BeginLifetimeScope(Conversation.Container, activity))
                {
                    await Conversation.SendAsync(activity, () => scope.Resolve<IDialog<object>>());
                }
            }

            var response = Request.CreateResponse(HttpStatusCode.OK);
            return response;
        }
    }

根对话框

[Serializable]
public class RootDialog : LuisDialog<object>
{
    private IRatingService _ratingService;

    public RootDialog(IRatingService ratingService)
    {
        this._ratingService = ratingService;
    }

    [LuisIntent("Movie")]
    public async Task IntentSearch(IDialogContext context, LuisResult result)
    {
        // Do stuff

        context.Call(new ReviewDialog(_ratingService), ChildDialogHasCompleted);
    }

    private async Task ChildDialogHasCompleted(IDialogContext context, IAwaitable<object> msg)
    {
        context.Done(true);
    }
}

评论对话框

[Serializable]
public class ReviewDialog : IDialog
{
    private IRatingService _ratingService;

    public ReviewDialog(IRatingService ratingService)
    {
        this._ratingService = ratingService;
    }

    public async Task StartAsync(IDialogContext context)
    {
        PromptDialog.Choice(context, ProcessRating, new List<string> { "1", "2", "3", "4", "5" }, "Please select your rating");
    }

    public async Task ProcessRating(IDialogContext context, IAwaitable<string> msg)
    {
        var message = await msg;

        context.UserData.TryGetValue("SelectedMovieId", out int movieId);

        var rating = int.Parse(message);

        _ratingService.Save(movieId, rating);

        await context.PostAsync("Thank you");

        context.Done(true);
    }
}

全局

public class WebApiApplication : System.Web.HttpApplication
{
    protected void Application_Start()
    {
        GlobalConfiguration.Configure(WebApiConfig.Register);

        var builder = new ContainerBuilder();

        builder.RegisterType<RootDialog>()
                .As<IDialog<object>>()
                .InstancePerDependency();

        builder.RegisterType<RatingService>()
                .Keyed<IRatingService>(FiberModule.Key_DoNotSerialize)
                .AsImplementedInterfaces();

        builder.Update(Conversation.Container);
    }
}

如有任何帮助，我们将不胜感激。

Answer 1

您这样做的方式完全有效。要查看另一个实现，请查看 AlarmBot

你这样做的方式通常也是我在对话框中使用 DI 的方式。还有另一种方法可以使用上下文 PrivateConversationData、ConversationData 和 UserData 中的数据包在对话框之间传递数据/类，但没有错用你做事的方式