c# - Botframework 中的消息不会延迟

Question

我正在向用户发回两条消息作为回复，如下所示，

static Timer t = new Timer(new TimerCallback(TimerEvent));
static Timer t1 = new Timer(new TimerCallback(TimerEventInActivity));
static int timeOut = Convert.ToInt32(ConfigurationManager.AppSettings["disableEndConversationTimer"]); //3600000

public static void CallTimer(int due) {
  t.Change(due, Timeout.Infinite);
}

public static void CallTimerInActivity(int due) {
  t1.Change(due, Timeout.Infinite);
}

public async static Task PostAsyncWithDelay(this IDialogContext ob, string text) {
  try {
    var message = ob.MakeMessage();
    message.Type = Microsoft.Bot.Connector.ActivityTypes.Message;
    message.Text = text;
    await PostAsyncWithDelay(ob, message);

    CallTimer(300000);

    if ("true".Equals(ConfigurationManager.AppSettings["disableEndConversation"])) {
      CallTimerInActivity(timeOut);
    }

  } catch (Exception ex) {
    Trace.TraceInformation(ex.Message);
  }

}

await context.PostAsyncWithDelay("Great!");
await context.PostAsyncWithDelay("I can help you with that.");

但是，在接收时它们之间没有延迟。两条消息一次性收到。

如何延迟第二条消息？

Answer 1

在根对话框

要延迟您的消息，您可以使用 Task.Delay 方法。将您的 PostAsyncWithDelay 更改为:

public async static Task PostAsyncWithDelay(IDialogContext context, string text)
{
        await Task.Delay(4000).ContinueWith(t =>
        {
            var message = context.MakeMessage();
            message.Text = text;
            using (var scope = DialogModule.BeginLifetimeScope(Conversation.Container, message))
            {
                var client = scope.Resolve<IConnectorClient>();
                client.Conversations.ReplyToActivityAsync((Activity)message);
            }

        });
}

当你想延迟消息时，你可以调用 PostAsyncWithDelay 方法，否则使用 context.PostAsync 方法来发送你的消息。

  private async Task MessageReceivedAsync(IDialogContext context, IAwaitable<object> result)
  {
          //Sending a message nomally
          await context.PostAsync("Hi");

          //Notify the user that the bot is typing
          var typing = context.MakeMessage();
          typing.Type = ActivityTypes.Typing;
          await context.PostAsync(typing);

          //The message you want to delay. 
          //NOTE: Do not use context.PostAsyncWithDelay instead simply call the method.
          await PostAsyncWithDelay(context, "2nd Hi");
  }

输出