C# http请求数据

http中get和post请求的最大区别:get是通过URL传递表单值，post传递的表单值是隐藏到 http报文体中

http以get方式请求数据

        /// <summary>
        /// get请求
        /// </summary>
        /// <param name="url">地址</param>
        /// <returns></returns>
        public string HttpGetRequest(string url)
        {
            //创建请求
            HttpWebRequest request =
                WebRequest.Create(url) as
                    HttpWebRequest;
            string json = "";

            //得到请求的返回数据
            using (HttpWebResponse response = (HttpWebResponse)request.GetResponse())
            {
                if (response.StatusCode == HttpStatusCode.OK) //表示返回的状态吗是200，请求成功
                {
                    //得到返回的数据流,进行读取
                    using (Stream streamResonse = response.GetResponseStream())
                    using (StreamReader reader = new StreamReader(streamResonse))
                    {

                        json = reader.ReadToEnd();
                    }
                }
            }

            return json;
        }

http以post方式请求数据

 /// <summary>
        /// post请求
        /// </summary>
        /// <param name="url">地址</param>
        /// <param name="parameters">数据参数</param>
        /// <returns></returns>
        public string HttpPostRequest(string url, IDictionary<string, object> parameters)
        {
            //创建请求
            HttpWebRequest request = WebRequest.Create(url) as HttpWebRequest;

            request.ProtocolVersion = HttpVersion.Version10;
            request.Method = "POST";
            request.ContentType = "application/x-www-form-urlencoded";


            //序列化--参数传递使用json传递
            string jsonRes = JsonConvert.SerializeObject(parameters);

            //发送请求数据
            byte[] data = Encoding.Default.GetBytes(jsonRes);
            using (Stream stream = request.GetRequestStream())
            {
                stream.Write(data, 0, data.Length);
            }

            string json = "";
            using (HttpWebResponse response = (HttpWebResponse)request.GetResponse())
            {
                if (response.StatusCode == HttpStatusCode.OK) //200
                {
                    using (Stream streamResonse = response.GetResponseStream())
                    using (StreamReader reader = new StreamReader(streamResonse))
                    {

                        json = reader.ReadToEnd();
                    }
                }
            }

            return json;
        }