表单生成器中的 BOT 框架应用程序中的异常:无法通过非托管方式序列化委托

Question

我在FormFlow中遇到以下错误。 快速的帮助真的很可观。

异常：捕获环境的匿名方法闭包是 不可序列化，请考虑删除环境捕获或使用 反射序列化代理项： FlightBot.FlightManager+<>c__DisplayClass2_0"， "附件"： [ { "内容类型"： "文本/纯文本"， "content"： " at Microsoft.Bot.Builder.Internals.Fibers.Serialization.ClosureCaptureErrorSurrogate.System.Runtime.Serialization.ISerializationSurrogate.GetObjectData(Object obj， SerializationInfo info， StreamingContext context(

在StackOverflow和GitHub上搜索后，我得到了一段代码，上面写着"你需要在autofac容器中注册它"。

所以我在WebAPIConfig中放置了下面的代码.cs

var builder = new ContainerBuilder();
builder.RegisterModule(new ReflectionSurrogateModule());
builder.Update(Conversation.Container);

但是我仍然得到一个错误，但是这次错误与以前不同

，如下所示，

"异常：无法通过非托管函数序列化委托 指针、动态方法或委托创建者外部的方法 程序集."， "附件"： [ { "内容类型"： "文本/纯文本"， "content"： " at System.MulticastDelegate.GetObjectData(SerializationInfo info， StreamingContext context(\r at System.Runtime.Serialization.Formatters.Binary.WriteObjectInfo.InitSerialize(Object obj， ISurrogateSelector surrogateSelector， StreamingContext context， SerObjectInfoInit serObjectInfoInit， IFormatterConverter converter， ObjectWriter objectWriter， SerializationBinder binder(\r

我已经在这里复制了我应用程序的完整代码。

1. 第一部分是消息控制器类，我从那里调用 飞行管理器，这是一个 LUIS 对话框。
2. 代码的第二部分是 FlightManager 类，我从那里调用 航班预订舱位。

3. 三是实际订舱位。

   [BotAuthentication]
   public class MessagesController : ApiController
   {
   internal static IDialog<object> MakeRootDialog()
   {
   return Chain.From(() => new FlightManager());
   }
   public async Task<HttpResponseMessage> Post([FromBody]Activity activity)
   {
   if (activity.Type == ActivityTypes.Message)
   {
   await Conversation.SendAsync(activity, MakeRootDialog);
   }
   else
   {
   HandleSystemMessage(activity);
   }
   var response = Request.CreateResponse(HttpStatusCode.OK);
   return response;
   }
   private Activity HandleSystemMessage(Activity message)
   {
   if (message.Type == ActivityTypes.DeleteUserData)
   {
   // Implement user deletion here
   // If we handle user deletion, return a real message
   }
   else if (message.Type == ActivityTypes.ConversationUpdate)
   {
   // Handle conversation state changes, like members being added and removed
   // Use Activity.MembersAdded and Activity.MembersRemoved and Activity.Action for info
   // Not available in all channels
   }
   else if (message.Type == ActivityTypes.ContactRelationUpdate)
   {
   // Handle add/remove from contact lists
   // Activity.From + Activity.Action represent what happened
   }
   else if (message.Type == ActivityTypes.Typing)
   {
   // Handle knowing tha the user is typing
   }
   else if (message.Type == ActivityTypes.Ping)
   {
   }
   return null;
   }
   }
   

---

namespace FlightBot
{
[LuisModel("luis model key", "luis secret")] 
[Serializable]
public class FlightManager : LuisDialog<object>
{
public async Task FlightBookingTask(IDialogContext context, LuisResult result)
{
PromptDialog.Confirm(
context: context,
resume: ResumeAndHandleConfirmAsync,
prompt: $"It seems you wish to book a flight. Do you wish to continue?",
retry: "I didn't understand. Please try again.");
}
private async Task ResumeAndHandleConfirmAsync(IDialogContext context, IAwaitable<bool> argument)
{
FlightBooking cb = new FlightBooking();
BuildFormDelegate<FlightBooking> MakeFlightBookingForm = () => FlightBooking.BuildForm(context);
var flightBooking = new FormDialog<FlightBooking>(cb, MakeFlightBookingForm, FormOptions.PromptInStart, null);
context.Call(flightBooking, FlightBookingComplete);
}
private async Task FlightBookingComplete(IDialogContext context, IAwaitable<FlightBooking> result)
{
context.Wait(MessageReceived);
}
}
}

---

namespace FlightBot
{
[Serializable]
public class FlightBooking
{
[Prompt("Enter source :")]
public string Source { get; set; }
[Prompt("Enter destination :")]
public string Destination { get; set; }
public static IForm<FlightBooking> BuildForm(IDialogContext context)
{
return new FormBuilder<FlightBooking>().Message("Tell me about flight details!")
.Field(nameof(Source))
.Field(nameof(Destination))
.Build();
}
}
}

---

Answer 1

我遇到了第一个例外，据我所知，当您调用此行中的表单构建器方法时，您无法发送参数：

BuildFormDelegate<FlightBooking> MakeFlightBookingForm = () => FlightBooking.BuildForm(context);

因此，请确保声明的方法没有任何参数：

public static IForm<FlightBooking> BuildForm()
{ //code   }

我希望这可以帮助您，祝您的机器人好运！