如何基于源代码过滤QnAMaker问题

我在Bot框架中使用qnamakerrestapi来查询知识库。

它的工作很好,但我想过滤的'问题'的基础上'源'上指定的 requestData https://docs.microsoft.com/en-us/azure/cognitive-services/qnamaker/how-to/metadata-generateanswer-usage

我尝试将“source”作为元数据传递给 strictFilters

Dictionary<string, object> requestData = new Dictionary<string, object>
{
    ["question"] = question,
    ["top"] = top,
    ["strictFilters"] = new Dictionary<string, object>
    {
        ["source"] = "test.tsv"
    }
};

string requestBody = JsonConvert.SerializeObject(requestData);
kbId = _configuration[qnaKbName];
method = "/knowledgebases/" + kbId + "/generateAnswer/";
var uri = host + method;
var response = await Post(uri, requestBody);
return response;

请求JSON格式-

{"question":"flexible working","top":5,"strictFilters":{"source":"test.tsv"}}

它不工作,我得到下面的回应-

{
  "error": {
    "code": "BadArgument",
    "message": "Parameter is null"
  }
}

尝试像这样创建请求JSON-

{"question":"sabbatical","top":5,"strictFilters":[{"name":"source","value":"test.tsv"}]}

{
  "error": {
    "code": "Unspecified",
    "message": "Something happened. Please retry after some time."
  }
}

有什么办法吗?如果我能提供更多细节,请告诉我。。