突然间，我的 BOT 今天开始因这个异常而失败：
无法加密 Null 属性。如果您希望对其进行加密，请为该属性指定一个默认值。
尝试设置对话数据时发生错误，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并且今天早上使用它没问题，我不太确定会发生什么。任何帮助，将不胜感激。
更新：
1) 在 dev.botframework.com 上使用模拟器或测试网络聊天客户端时，我看不到此错误，仅在使用 Teams 时 2) 大多数逻辑存在于我的 LUIS 对话框和其他特定对话框中意图：
[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();
}