C# http接口请求

方法一：Get请求：

 /// <summary>
        /// httpRequest 
        /// </summary>
        /// <param name="url">http接口路径</param>
        /// <returns>将http接口信息进行返回</returns>
        public string httpRequest(string Url)
        {
            string retString = string.Empty;
            try
            {
                LogHelper.WriteLog(GetType(), "httpRequest方法接收入参为：" + Url);
                HttpWebRequest request = (HttpWebRequest)WebRequest.Create(Url);
                request.Proxy = null;
                request.KeepAlive = false;
                request.Method = "GET";
                request.ContentType = "application/json; charset=UTF-8";
                request.AutomaticDecompression = DecompressionMethods.GZip;
                HttpWebResponse response = (HttpWebResponse)request.GetResponse();
                Stream myResponseStream = response.GetResponseStream();
                StreamReader myStreamReader = new StreamReader(myResponseStream, Encoding.UTF8);
                retString = myStreamReader.ReadToEnd();
                myStreamReader.Close();
                myResponseStream.Close();
                //retString = System.Text.RegularExpressions.Regex.Unescape(retString);//字符串转义
                if (response != null)
                {
                    response.Close();
                }
                if (request != null)
                {
                    request.Abort();
                }

            }
            catch (Exception ex)
            {

                LogHelper.WriteLog(GetType(), "httpRequest方法异常错误为：" + ex.Message);
            }
            LogHelper.WriteLog(GetType(), "httpRequest方法接收返回值为：" + retString);
            return retString;
        }

　　方法二Post请求：

 string url = "http://192.168.1.219:8088/system-demo-newui/public/index.php/zizhu/menzhen/hospital/getAdvert";//获取http地址
        string json = "{\"devCode\":\"H000_0102\"}";//获取传参json串
        public void cesi()
        {
            Post(url, json);
        }
        /// <summary>
        /// post请求http接口
        /// </summary>
        /// <param name="Url">http接口路径</param>
        /// <param name="jsonParas">传参json串</param>
        /// <returns></returns>
        public string Post(string Url, string jsonParas)
        {
            string postContent = string.Empty;
            HttpWebResponse response;
            try
            {
                LogHelper.WriteLog(GetType(), "进入Post方法，入参为：" + Url + ",入参2为：" + "jsonParas");
                string strURL = Url;
                //创建一个HTTP请求  
                HttpWebRequest request = (HttpWebRequest)WebRequest.Create(strURL);
                //Post请求方式  
                request.Method = "POST";
                //内容类型
                request.ContentType = "application/json";
                //设置参数，并进行URL编码 
                string paraUrlCoded = jsonParas;//System.Web.HttpUtility.UrlEncode(jsonParas);   
                byte[] payload;
                //将Json字符串转化为字节  
                payload = System.Text.Encoding.UTF8.GetBytes(paraUrlCoded);
                //设置请求的ContentLength   
                request.ContentLength = payload.Length;
                //发送请求，获得请求流 
                Stream writer;
                try
                {
                    writer = request.GetRequestStream();//获取用于写入请求数据的Stream对象
                }
                catch (Exception ex)
                {
                    writer = null;
                    LogHelper.WriteLog(GetType(), "Post获取用于写入请求数据的Stream对象异常错误：" + ex.Message);
                    //  Console.Write("连接服务器失败!");
                }
                //将请求参数写入流
                writer.Write(payload, 0, payload.Length);
                writer.Close();//关闭请求流
                               // String strValue = "";//strValue为http响应所返回的字符流
                try
                {
                    //获得响应流
                    response = (HttpWebResponse)request.GetResponse();
                }
                catch (WebException ex)
                {
                    response = ex.Response as HttpWebResponse;
                }
                Stream s = response.GetResponseStream();
                //  Stream postData = Request.InputStream;
                StreamReader sRead = new StreamReader(s);
                postContent = sRead.ReadToEnd();
                sRead.Close();
            }
            catch (Exception ex)
            {
                LogHelper.WriteLog(GetType(), "Post请求接口异常错误：" + ex.Message);
            }
            return postContent;//返回Json数据
        }