Watson Assistant对话框-无法进入子节点Watson Assistant V1

Question

我是IBM Watson助手的新手。我开发了ASP.net Web API来调用对IBM Watson Assistant的请求。根对话框节点工作正常。但是未输入子对话框节点。我试图发送带有下一个请求的先前响应内容。但这行不通。

以下代码显示了我如何尝试通过新请求发送内容。但是服务器返回状态码400错误的请求。

    [HttpPost]
    [Route("api/ChatbotApi/ResponseMessage")]
    public async Task<String[]> ResponseMessage([FromBody]JObject data)
    {
        string context = data["context"].ToString();
        string input = data["text"].ToString();
        string request = null;
        string responseOut = null;
        string contextOut = null;
        JObject jo = null;
        JObject jResult = null;
        String[] responce = new String[2];
        if (string.IsNullOrEmpty(context))
        {
            request = "{\"input\": {\"text\": \"" + input + "\"}, \"alternate_intents\": true}";
        }
        else
        {
            request = "{\"input\": {\"text\": \"" + input + "\"}, \"alternate_intents\": true}, \"context\": \"" + context + "\"";
        }

        using (var handler = new HttpClientHandler
        {
            Credentials = networkCredential
        })

        using (var client = new HttpClient(handler))
        {
            var cont = new HttpRequestMessage();
            cont.Content = new StringContent(request.ToString(), Encoding.UTF8, "application/json");
            var result = await client.PostAsync(serverLink, cont.Content);
            string respose = await result.Content.ReadAsStringAsync();
            string responseBody = JsonConvert.DeserializeObject(respose).ToString();
            jo = JObject.Parse(responseBody);
            responseOut = jo["output"]["text"][0].ToString();
            contextOut = jo["context"].ToString();
            responce[0] = responseOut;
            responce[1] = contextOut ;

        }
        return responce;
    }

我现在需要如何设置下一个请求的上一个响应的内容。