我们可以让聊天机器人先说问候语，而不仅仅是作为反应吗

我正在使用 Microsoftt Bot Framework 和 LUIS 认知服务开发聊天机器人。 我想要一条初始欢迎消息，例如“你好，用户，你好吗！”我的机器人一启动。

在 MessageController 中可以做任何事情

public async Task<HttpResponseMessage> Post([FromBody]Activity activity)
        {
            Trace.TraceInformation($"Type={activity.Type} Text={activity.Text}");

            if (activity.Type == ActivityTypes.Message)
            {
                //await Microsoft.Bot.Builder.Dialogs.Conversation.SendAsync(activity, () => new ContactOneDialog());

                await Microsoft.Bot.Builder.Dialogs.Conversation.SendAsync(activity, () =>
                new ExceptionHandlerDialog<object>(new ShuttleBusDialog(), displayException: true));

                //await Microsoft.Bot.Builder.Dialogs.Conversation.SendAsync(activity, () => new ShuttleBusDialog());
            }
            else
            {
                HandleSystemMessage(activity);
            }
            var response = Request.CreateResponse(System.Net.HttpStatusCode.OK);
            return response;
        }

您可能想尝试将消息作为ConversationUpdate事件。更新你的HandleSystemMessage方法，因此看起来如下所示：

    private async Task 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)
        {
            ConnectorClient client = new ConnectorClient(new Uri(message.ServiceUrl));

            var reply = message.CreateReply();

            reply.Text = "Hello user how are you?"

            await client.Conversations.ReplyToActivityAsync(reply);
        }
        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)
        {
        }
    }