Microsoft Bot Framwork使用数据库结果

Question

我想让我的对话框与我的数据库一起工作。 如果我有我的对话是这样的：

[Serializable] 
public class QuestionDialog : IDialog<object> 
{ 

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

     // Move to the next method 
     context.Wait(StepOneAsync); 
    } 

    /// <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 StepOneAsync(IDialogContext context, IAwaitable<IMessageActivity> result) 
    { 

     // Get our activity 
     var activity = await result; 

     // Ask our first question 
     await context.PostAsync("hi"); 

     // Get our answer 
     context.Done(this); 
    } 
} 

一切正常，我让我的消息，如预期。然后，我把它改成这样：

[Serializable] 
public class QuestionDialog : IDialog<object> 
{ 

    // Private properties 
    private IList<QuestionGroup> _questionGroups; 

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

     try 

     { 

      // Create our service 
      var questionGroupService = new QuestionGroupService(new UnitOfWork<DatabaseContext>()); 

      // Add our question groups 
      this._questionGroups = await questionGroupService.ListAllAsync(); 

      // Move to the next method 
      context.Wait(StepOneAsync); 
     } catch (Exception ex) 
     { 

     } 
    } 

    /// <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 StepOneAsync(IDialogContext context, IAwaitable<IMessageActivity> result) 
    { 

     // Get our activity 
     var activity = await result; 

     // Ask our first question 
     await context.PostAsync("hi"); 

     // Get our answer 
     context.Done(this); 
    } 
} 

而且它不会去的StepOneAsync方法。任何人都可以看到明显的事情，为什么这不起作用？

Answer 1

确保您的QestionGroup模型标记为可序列化。

如果你不能让它序列化，你还是希望自己的对话过程中引用它，你需要去与Bot Framework Technical FAQ的“How can I reference non-serializable services from my C# dialogs?”部分中描述的备选方案之一。

最简单的是在您的字段中使用NonSerialized属性。

或者，您可以尝试通过将反射序列化代理添加到Autofac容器来注册。在您的global.asax中，请尝试添加以下代码：

var builder = new ContainerBuilder(); 

builder.RegisterModule(new ReflectionSurrogateModule()); 

builder.Update(Conversation.Container);