Question

在我的Messages控制器中，我想检查传入消息的堆栈中是否有某个对话框，然后再将其发送到对话框，以便我可以抑制某些条件行为。我按照this answer尝试解析IDialogStack，如下所示：

public async Task<HttpResponseMessage> Post([FromBody] Activity incomingMessage)
    {
        try
        {
            if (incomingMessage.Type == ActivityTypes.Message)
            {
                using (var scope = DialogModule.BeginLifetimeScope(Conversation.Container, activity))
                {
                    var stack = scope.Resolve<IDialogStack>();
                }
                ...

以下是我在Global.asax中注册的模块：

    private void RegisterBotModules()
    {
        var builder = new ContainerBuilder();

        builder.RegisterModule(new DialogModule());
        builder.RegisterModule(new ReflectionSurrogateModule());
        builder.RegisterModule(new DialogModule_MakeRoot());

        builder.RegisterModule<GlobalMessageHandler>();

        builder.RegisterModule(new AzureModule(Assembly.GetExecutingAssembly()));

        var store = new TableBotDataStore(/*connection string*/);
        builder.Register(c => store)
            .Keyed<IBotDataStore<BotData>>(AzureModule.Key_DataStore)
            .AsSelf()
            .SingleInstance();

        builder.Register(c => new CachingBotDataStore(store, CachingBotDataStoreConsistencyPolicy.ETagBasedConsistency))
            .As<IBotDataStore<BotData>>()
            .AsSelf()
            .InstancePerLifetimeScope();

        builder.Update(Conversation.Container);
        var config = GlobalConfiguration.Configuration;
        config.DependencyResolver = new AutofacWebApiDependencyResolver(Conversation.Container);
    }

但是，我得到以下例外：

{“在激活特定注册期间发生错误。有关详细信息，请参阅内部异常。注册：Activator = IDialogTask（DelegateActivator），Services = [Microsoft.Bot.Builder.Dialogs.Internals.IDialogStack，Microsoft.Bot .Builder.Dialogs.Internals.IDialogTask]，Lifetime = Autofac.Core.Lifetime.CurrentScopeLifetime，Sharing = Shared，Ownership = OwnedByLifetimeScope ---＆gt;对象引用未设置为对象的实例。（有关详细信息，请参阅内部异常。）“

内部异常：

“对象引用未设置为对象的实例。”
Autofac.Core.Resolving，Autofac.Core.Resolving.InstanceLookup.Execute（）\ r \ n在Autofac.Core.Resolving上的Autofac.Core.Resolving.InstanceLookup.Activate（IEnumerable 1 parameters)\r\n at Autofac.Core.Resolving.InstanceLookup.<Execute>b__5_0()\r\n at Autofac.Core.Lifetime.LifetimeScope.GetOrCreateAndShare(Guid id, Func 1个创建者）\ r \ n .ResolveOperation.GetOrCreateInstance（ISharingLifetimeScope currentOperationScope，IComponentRegistration注册，IEnumerable 1 parameters)\r\n at Autofac.Core.Resolving.ResolveOperation.Execute(IComponentRegistration registration, IEnumerable 1个参数）\ r \ n在Autofac.Core.Lifetime.LifetimeScope.ResolveComponent（IComponentRegistration注册，IEnumerable 1 parameters)\r\n at Autofac.ResolutionExtensions.TryResolveService(IComponentContext context, Service service, IEnumerable 1个参数，Object＆amp; instance ）\ r \ n在Autofac.ResolutionExtensions.ResolveService（IComponentContext上下文，服务服务，IEnumerable 1 parameters)\r\n at Autofac.ResolutionExtensions.Resolve[TService](IComponentContext context, IEnumerable 1参数）\ r \ n at Autofac.ResolutionExtensions.Resolve [TService]（IComponentContext context）\ r \ n在Progressive .CQBot.Controllers.MessagesController.d__0.MoveNext（）在D：\ Source \ Repos \ QUO_Cognitive_Quoting \ Src \ CQBot \ Controllers \ MessagesController.cs：第33行“

链接答案中的建议是否已弃用？我缺少一些模块注册吗？我会很感激任何方向！

Answer 1

在解析 IDialogStack 之前，需要在范围内加载 BotData 。

请尝试以下方法：

using (var scope = DialogModule.BeginLifetimeScope(Conversation.Container, activity))
{
    var botData = scope.Resolve<IBotData>();
    await botData.LoadAsync(new System.Threading.CancellationToken());

    var stack = scope.Resolve<IDialogStack>();
}

如何在Bot Framework MessagesController中解析当前对话框堆栈？

1 个答案: