c# - 返回 json 的 字符串

Question

这让我很沮丧，谷歌现在不是我的 friend 。

我有一个GET方法返回参数T

public T GET(string path, string filter = "", string select = "")
    {
        //Check for accesstoken
        oAuthHelper.GetAccessToken();

        //request token
        var restclient = new RestClient(_url);
        RestRequest request = new RestRequest(string.Format("api/v1/{1}/{0}", path, Global._DIVISION)) { Method = Method.GET };

        request.AddHeader("Accept", "application/json");
        request.AddHeader("Content-Type", "application/text");

        //GUID FILTER"
        //string.Format("ID eq guid'{0}'",  "6526d916-173b-4c23-b3da-068c70d6a867")

        if (!string.IsNullOrEmpty(filter))
            request.AddParameter("$filter", filter, ParameterType.QueryString);

        if (!string.IsNullOrEmpty(select))
            request.AddParameter("$select", select, ParameterType.QueryString);

        request.AddParameter("Authorization", string.Format("Bearer " + Global._ACCESTOKEN),
        ParameterType.HttpHeader);

        var tResponse = restclient.Execute(request);
        var responseJson = tResponse.Content;



        JObject obj = JObject.Parse(responseJson);

        JArray categories = (JArray)obj["d"]["results"];

        if (categories.Count == 0)
        {
            return default(T);
        }

        string JSON = categories.ToString();

        return JsonConvert.DeserializeObject<T>(JSON);
    }

T 是字符串类型，我只想返回纯 JSON 数据。

            //HttpClientWrapper
        using (var client = new HttpClientWrapper<string>())
        {
            var data = client.GET(_URL, null, null);
            return data.ToString();
        }

但是当我将 JSON 放入 DeserializeObject 时，我收到以下错误消息:

Additional information: Unexpected character encountered while parsing value: [. Path '', line 1, position 1.

当我将它作为 List 返回时它会起作用但就像输入字符串一样，它会给出错误。

Answer 1

The T is type of string, i just want to return the plain JSON data.

如果你想要纯 JSON 数据，为什么要调用 DeserializeObject？

听起来你想要这样的东西:

...
string JSON = categories.ToString();

// exit early, if we want the plain JSON data
if (typeof(T) == typeof(string))
    return (T)(object)JSON;

return JsonConvert.DeserializeObject<T>(JSON);

双重转换 (T)(object) 是必要的，因为我们知道 T 是字符串类型，但编译器不知道't.