我正在尝试自定义CoreBot示例（https://github.com/microsoft/BotBuilder-Samples/tree/master/samples/csharp_dotnetcore/13.core-bot），因此它还可以接收文字之外的图像。

尽管下面有很多很好的文档和有关stackoverflow的响应，但是我对C＃还是陌生的，并且很难将几段代码与C＃语法结合起来。

• https://docs.microsoft.com/en-us/azure/bot-service/bot-builder-howto-add-media-attachments?view=azure-bot-service-4.0&tabs=csharp
• https://docs.microsoft.com/en-us/azure/bot-service/dotnet/bot-builder-dotnet-add-media-attachments?view=azure-bot-service-3.0
• https://docs.microsoft.com/en-us/azure/bot-service/nodejs/bot-builder-nodejs-send-receive-attachments?view=azure-bot-service-3.0
• how to send images which are in local folder in microsoft botframework sdk v4 using c#
• Can a Bot receive image as message or attachment from a user

在下面的代码中，我将这段代码插入CoreBot中：

var activity = stepContext.Context.activity
            var reply = activity.CreateReply();
            if (activity.Attachments != null && activity.Attachments.Any())
                {
                var messageText = stepContext.Options?.ToString() ?? "this seems to be an image an i am not yet able to understand it";
                var promptMessage = MessageFactory.Text(messageText,messageText,InputHints.ExpectingInput);
                return await stepContext.PromptAsync(nameof(TextPrompt),new PromptOptions { Prompt = promptMessage },cancellationToken);
            }

下面是我在其中插入了“ if image then”的代码块

private async Task<DialogTurnResult> actStepAsync(WaterfallStepContext stepContext,CancellationToken cancellationToken)
        {


             if (!_luisRecognizer.IsConfigured)
            {
                // LUIS is not configured,we just run the BookingDialog path with an empty BookingDetailsInstance.
                return await stepContext.BeginDialogAsync(nameof(BookingDialog),new BookingDetails(),cancellationToken);
            }

            var activity = stepContext.Context.activity;
            if (activity.Attachments != null && activity.Attachments.Any())
                {
                var messageText = stepContext.Options?.ToString() ?? "this seems to be an image an i am not yet able to understand it";
                var promptMessage = MessageFactory.Text(messageText,cancellationToken);
            }



            // Call LUIS and gather any potential booking details. (Note the TurnContext has the response to the prompt.)
            var luisResult = await _luisRecognizer.RecognizeAsync<FlightBooking>(stepContext.Context,cancellationToken);
            switch (luisResult.TopIntent().intent)
            {
                case FlightBooking.Intent.BookFlight:
                    await ShowWarningForUnsupportedCities(stepContext.Context,luisResult,cancellationToken);

                    // Initialize BookingDetails with any entities we may have found in the response.
                    var bookingDetails = new BookingDetails()
                    {
                        // Get destination and origin from the composite entities arrays.
                        Destination = luisResult.ToEntities.Airport,Origin = luisResult.FromEntities.Airport,TravelDate = luisResult.TravelDate,};

                    // Run the BookingDialog giving it whatever details we have from the LUIS call,it will fill out the remainder.
                    return await stepContext.BeginDialogAsync(nameof(BookingDialog),bookingDetails,cancellationToken);

我还在瀑布声明中添加了AddDialog(new AttachmentPrompt(nameof(AttachmentPrompt)));，如下所示

public MainDialog(FlightBookingRecognizer luisRecognizer,BookingDialog bookingDialog,ILogger<MainDialog> logger)
                : base(nameof(MainDialog))
        {
            _luisRecognizer = luisRecognizer;
            Logger = logger;

            AddDialog(new TextPrompt(nameof(TextPrompt)));
            AddDialog(bookingDialog);
            AddDialog(new AttachmentPrompt(nameof(AttachmentPrompt)));
            AddDialog(new WaterfallDialog(nameof(WaterfallDialog),new WaterfallStep[]
            {
                IntroStepAsync,actStepAsync,}));

            // The initial child Dialog to run.
            InitialDialogId = nameof(WaterfallDialog);
        }

问题是我添加的那段代码没有执行任何操作。

如上所述，我是C＃的菜鸟，任何建议或观察将不胜感激！