使用httpwebrequest发送http请求

 HttpWebRequest request = WebRequest.Create("url") as HttpWebRequest;
            request.Timeout =  *  * ;
            request.Method = "POST";
            request.ContentType = "application/x-www-form-urlencoded";//数据放在body中，以键值对形式
            request.KeepAlive = true;
            request.Headers.Add("Authorization", Authorization);//api 的验证 信息
            string ss = System.Web.HttpUtility.UrlEncode("key") + "=" + System.Web.HttpUtility.UrlEncode(value);//参数使用urlencode编码，
//空格全部用+代替
byte[] postData = encoding.GetBytes(ss);
            request.ContentLength = postData.Length;
            Stream requestStream = request.GetRequestStream();
            requestStream.Write(postData, , postData.Length);
            requestStream.Close();

            var response = (HttpWebResponse)request.GetResponse();
            Stream responseStream = response.GetResponseStream();

            StreamReader reader = new StreamReader(responseStream, encoding);
            string result = reader.ReadToEnd();

            reader.Close();
            responseStream.Close();

2 拿到api返回的json格式之后使用newtonsoft来反序列化

 private static T DeserializeObject<T>(string equityJson)
        {
//将返回的json反序列化成objec
            object _object = JsonConvert.DeserializeObject(equityJson);
//转换成jobject
            Newtonsoft.Json.Linq.JObject jObject = _object as Newtonsoft.Json.Linq.JObject;
//根据键值对的形式拿到对应的value
            string dataJson = jObject["data"].ToString();

            object dataObj = JsonConvert.DeserializeObject(dataJson);
            JObject jdataObj = dataObj as JObject;
            string capabilityResults = jdataObj["capabilityResults"].ToString();

            object capabilityResultsObj = JsonConvert.DeserializeObject(capabilityResults);
            JObject jcapabilityResultsObj = capabilityResultsObj as JObject;
            string equity_name_matching = jcapabilityResultsObj["equity_name_matching"].ToString();

            T equityMatchReturn = JsonConvert.DeserializeObject<T>(equity_name_matching);
            return equityMatchReturn;
        }