Convert JSON data to querystring in C# GET request

Question

What is the best way to convert a JSON object into querystrings to append to a GET Url? The POST is straight forward and gets read by my Web API backend.

{Name: 'Mike' } = ?Name=Mike

 private static string MakeRequest(HttpWebRequest req, string data)
            {
                try
                {
                    if (req.Method == Verbs.POST.ToString() || req.Method == Verbs.PUT.ToString() || req.Method == Verbs.DELETE.ToString())
                    {
                        var encodedData = Encoding.UTF8.GetBytes(data);

                        req.ContentLength = encodedData.Length;
                        req.ContentType = "application/json";
                        req.GetRequestStream().Write(encodedData, 0, encodedData.Length);
                    }

                    using (var response = req.GetResponse() as HttpWebResponse)
                    using (var reader = new StreamReader(response.GetResponseStream()))
                    {
                        return reader.ReadToEnd();
                    }
                }
                catch (WebException we)
                {
                    if(we.Response == null)
                    {
                        return JsonConvert.SerializeObject(new { Errors = new List<ApiError> { new ApiError(11, "API is currently unavailable") }});
                    }

                    using (var response = we.Response as HttpWebResponse)
                    using (var reader = new StreamReader(response.GetResponseStream()))
                    {
                        return reader.ReadToEnd();
                    }
                }


  }

Answer 1

If the json object is flat as in your example, then

string json = @"{
    ""name"": ""charlie"",
    ""num"": 123
}";

var jObj = (JObject)JsonConvert.DeserializeObject(json);

var query = String.Join("&",
                jObj.Children().Cast<JProperty>()
                .Select(jp=>jp.Name + "=" + HttpUtility.UrlEncode(jp.Value.ToString())));

query would be name=charlie&num=123