BOTS框架，Null属性不能加密

Question

突然间，我的机器人开始失败了，今天出现了这样的例外：

空属性不能加密。如果要加密该属性，请为其分配默认值。

当试图设置会话数据时会发生错误，这是堆栈跟踪：

    at Microsoft.Bot.Connector.ErrorHandling.<HandleErrorAsync>d__2`1.MoveNext()
--- End of stack trace from previous location where exception was thrown ---
    at System.Runtime.ExceptionServices.ExceptionDispatchInfo.Throw()
    at System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification(Task task)
    at Microsoft.Bot.Connector.BotStateExtensions.<SetConversationDataAsync>d__9.MoveNext()
--- End of stack trace from previous location where exception was thrown ---
    at System.Runtime.ExceptionServices.ExceptionDispatchInfo.Throw()
    at System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification(Task task)
    at Microsoft.Bot.Builder.Dialogs.Internals.ConnectorStore.<Microsoft-Bot-Builder-Dialogs-Internals-IBotDataStore<Microsoft-Bot-Connector-BotData>-SaveAsync>d__3.MoveNext()
--- End of stack trace from previous location where exception was thrown ---
    at System.Runtime.ExceptionServices.ExceptionDispatchInfo.Throw()
    at System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification(Task task)
    at Microsoft.Bot.Builder.Dialogs.Internals.CachingBotDataStore.<Save>d__10.MoveNext()
--- End of stack trace from previous location where exception was thrown ---
    at System.Runtime.ExceptionServices.ExceptionDispatchInfo.Throw()
    at System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification(Task task)
    at Microsoft.Bot.Builder.Dialogs.Internals.CachingBotDataStore.<Microsoft-Bot-Builder-Dialogs-Internals-IBotDataStore<Microsoft-Bot-Connector-BotData>-FlushAsync>d__5.MoveNext()
--- End of stack trace from previous location where exception was thrown ---
    at System.Runtime.ExceptionServices.ExceptionDispatchInfo.Throw()
    at System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification(Task task)
    at Microsoft.Bot.Builder.Dialogs.Internals.BotDataBase`1.<FlushAsync>d__9.MoveNext()
--- End of stack trace from previous location where exception was thrown ---
    at System.Runtime.ExceptionServices.ExceptionDispatchInfo.Throw()
    at System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification(Task task)
    at Microsoft.Bot.Builder.Dialogs.Internals.DialogTaskManagerBotDataLoader.<FlushAsync>d__12.MoveNext()
--- End of stack trace from previous location where exception was thrown ---
    at System.Runtime.ExceptionServices.ExceptionDispatchInfo.Throw()
    at System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification(Task task)
    at Microsoft.Bot.Builder.Dialogs.Internals.PersistentDialogTask.<Microsoft-Bot-Builder-Dialogs-Internals-IPostToBot-PostAsync>d__3.MoveNext()
--- End of stack trace from previous location where exception was thrown ---
    at System.Runtime.ExceptionServices.ExceptionDispatchInfo.Throw()
    at System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification(Task task)
    at Microsoft.Bot.Builder.Dialogs.Internals.ExceptionTranslationDialogTask.<Microsoft-Bot-Builder-Dialogs-Internals-IPostToBot-PostAsync>d__2.MoveNext()
--- End of stack trace from previous location where exception was thrown ---
    at System.Runtime.ExceptionServices.ExceptionDispatchInfo.Throw()
    at System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification(Task task)
    at Microsoft.Bot.Builder.Dialogs.Internals.SerializeByConversation.<Microsoft-Bot-Builder-Dialogs-Internals-IPostToBot-PostAsync>d__4.MoveNext()
--- End of stack trace from previous location where exception was thrown ---
    at System.Runtime.ExceptionServices.ExceptionDispatchInfo.Throw()
    at System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification(Task task)
    at Microsoft.Bot.Builder.Dialogs.Internals.PostUnhandledExceptionToUser.<Microsoft-Bot-Builder-Dialogs-Internals-IPostToBot-PostAsync>d__5.MoveNext()
--- End of stack trace from previous location where exception was thrown ---
    at System.Runtime.ExceptionServices.ExceptionDispatchInfo.Throw()
    at Microsoft.Bot.Builder.Dialogs.Internals.PostUnhandledExceptionToUser.<Microsoft-Bot-Builder-Dialogs-Internals-IPostToBot-PostAsync>d__5.MoveNext()
--- End of stack trace from previous location where exception was thrown ---
    at System.Runtime.ExceptionServices.ExceptionDispatchInfo.Throw()
    at System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification(Task task)
    at Microsoft.Bot.Builder.Dialogs.Internals.LogPostToBot.<Microsoft-Bot-Builder-Dialogs-Internals-IPostToBot-PostAsync>d__3.MoveNext()
--- End of stack trace from previous location where exception was thrown ---
    at System.Runtime.ExceptionServices.ExceptionDispatchInfo.Throw()
    at System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification(Task task)
    at Microsoft.Bot.Builder.Dialogs.Conversation.<SendAsync>d__11.MoveNext()
--- End of stack trace from previous location where exception was thrown ---
    at System.Runtime.ExceptionServices.ExceptionDispatchInfo.Throw()
    at System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification(Task task)
    at Microsoft.Bot.Builder.Dialogs.Conversation.<SendAsync>d__6.MoveNext()
--- End of stack trace from previous location where exception was thrown ---
    at System.Runtime.ExceptionServices.ExceptionDispatchInfo.Throw()
    at System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification(Task task)
    at System.Runtime.CompilerServices.TaskAwaiter.GetResult()
    at TransAlta.Trading.Bot.Controllers.MessagesController.<Post>d__0.MoveNext() in C:\Users\acodallo\Documents\Bots\TradingBot\TradingBot\Controllers\MessagesController.cs:line 28

由于我没有更改代码，而且我今天早上使用它没有问题，所以我不太确定会发生什么。任何帮助都将不胜感激。

更新：

1)在dev.botframework.com上使用模拟器或测试web聊天客户端时，我没有看到这个错误，只有当使用Team 2)时，大多数逻辑都存在于我的LUIS对话框和其他特定的对话框中，这些对话框会根据目的而被启动：

[LuisIntent("Power.Buy")]
public async Task PowerTrade(IDialogContext context, IAwaitable<IMessageActivity>activity, LuisResult result)
{            
  BaseTrade formState = BaseTrade.InitState(result);
  formState.PositionType = PositionType.Buy;           

  SetCommonFields(formState);

  var tradeFormDialog = new FormDialog<BaseTrade>(formState, _tradeCreationDelegate, FormOptions.PromptInStart);            
  context.Call(tradeFormDialog, TradeTypeSpecificsDialog);
}

BaseTrade模型：

public enum PositionType
{
    Buy, Sell, Swap              
}

public enum Unit
{
    Mw,
    Mwh,
    Gj,
    Mmbtu
}
public enum Timezone
{
    APT = 1,
    AST,
    CPT,
    CST,
    EPT,
    EST,
    GMT,
    MPT,
    MST,
    PPT,
    PST
}

[Serializable]
public class BaseTrade
{

    [Prompt("Position Type?")]
    public PositionType? PositionType;

    [Prompt("Who is the counterparty?")]
    public string Counterparty;         

    [Prompt("Start date?")]
    public DateTime StartDate;

    [Prompt("End date?")]
    public DateTime EndDate;

    public Timezone Timezone;

    [Prompt("Please enter the trade quantity")]
    public int? Quantity;

    public Unit? Unit;

    [Prompt("Price?")]
    public int? Price;

    public DateTime? TradeDate = new DateTime();

    public static IForm<BaseTrade> BuildForm()
    {
        return new FormBuilder<BaseTrade>().Message("OK, we are going to create a trade").Build();
    }

Answer 1

事实证明，这是微软方面的一个问题。