C# 整理Get和Post请求【全】

      /// <summary>
     /// 指定Post地址使用Get 方式获取全部字符串
     /// </summary>
     /// <param name="url">请求后台地址</param>
     /// <returns></returns>
        public static string Get(string url)
        {
            string result = "";
            HttpWebRequest req = (HttpWebRequest)WebRequest.Create(url);
            req.Method = "GET";
            HttpWebResponse resp = (HttpWebResponse)req.GetResponse();
            Stream stream = resp.GetResponseStream();
            //获取内容
            using (StreamReader reader = new StreamReader(stream, Encoding.UTF8))
            {
                result = reader.ReadToEnd();
            }
            return result;
        }

        /// <summary>
        /// 指定Post地址使用Get 方式获取全部字符串
        /// </summary>
        /// <param name="url">请求后台地址</param>
        /// <returns></returns>
        public static string Post(string url)
        {
            string result = "";
            HttpWebRequest req = (HttpWebRequest)WebRequest.Create(url);
            req.Method = "POST";
            HttpWebResponse resp = (HttpWebResponse)req.GetResponse();
            Stream stream = resp.GetResponseStream();
            //获取内容
            using (StreamReader reader = new StreamReader(stream, Encoding.UTF8))
            {
                result = reader.ReadToEnd();
            }
            return result;
        }
        /// <summary>
        /// 指定Post地址使用Get 方式获取全部字符串
        /// </summary>
        /// <param name="url">请求后台地址</param>
        /// <returns></returns>
        public static string Post(string url, Dictionary<string, string> dic)
        {
            string result = "";
            HttpWebRequest req = (HttpWebRequest)WebRequest.Create(url);
            req.Method = "POST";
            req.ContentType = "application/x-www-form-urlencoded";
            #region 添加Post 参数
            StringBuilder builder = new StringBuilder();
            int i = 0;
            foreach (var item in dic)
            {
                if (i > 0)
                    builder.Append("&");
                builder.AppendFormat("{0}={1}", item.Key, item.Value);
                i++;
            }
            byte[] data = Encoding.UTF8.GetBytes(builder.ToString());
            req.ContentLength = data.Length;
            using (Stream reqStream = req.GetRequestStream())
            {
                reqStream.Write(data, 0, data.Length);
                reqStream.Close();
            }
            #endregion
            HttpWebResponse resp = (HttpWebResponse)req.GetResponse();
            Stream stream = resp.GetResponseStream();
            //获取响应内容
            using (StreamReader reader = new StreamReader(stream, Encoding.UTF8))
            {
                result = reader.ReadToEnd();
            }
            return result;
        }

        /// <summary>
        /// 指定Post地址使用Get 方式获取全部字符串
        /// </summary>
        /// <param name="url">请求后台地址</param>
        /// <param name="content">Post提交数据内容(utf-8编码的)ie=utf-8&source=txt</param>
        /// <returns></returns>
        public static string Post(string url, string content)
        {
            string result = "";
            HttpWebRequest req = (HttpWebRequest)WebRequest.Create(url);
            req.Method = "POST";
            req.ContentType = "application/x-www-form-urlencoded";

            #region 添加Post 参数
            byte[] data = Encoding.UTF8.GetBytes(content);
            req.ContentLength = data.Length;
            using (Stream reqStream = req.GetRequestStream())
            {
                reqStream.Write(data, 0, data.Length);
                reqStream.Close();
            }
            #endregion

            HttpWebResponse resp = (HttpWebResponse)req.GetResponse();
            Stream stream = resp.GetResponseStream();
            //获取响应内容
            using (StreamReader reader = new StreamReader(stream, Encoding.UTF8))
            {
                result = reader.ReadToEnd();
            }
            return result;

        }
        /// <summary>
        /// POST整个字符串到URL地址中
        /// </summary>
        /// <param name="Url"></param>
        /// <param name="jsonParas"></param>
        /// <returns></returns>
        public string PostJson(string Url, string 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/x-www-form-urlencoded";

            //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)
            {
                writer = null;
                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
            HttpWebResponse response;
            try
            {
                //获得响应流
                response = (HttpWebResponse)request.GetResponse();
            }
            catch (WebException ex)
            {
                response = ex.Response as HttpWebResponse;
            }



            Stream s = response.GetResponseStream();

            StreamReader sRead = new StreamReader(s);
            string postContent = sRead.ReadToEnd();
            sRead.Close();

            return postContent;//返回Json数据
        }

        public string HttpPostRaw(string url, string data)
        {
            string value = "";
            try
            {
                HttpWebRequest reqest = (HttpWebRequest)WebRequest.Create(url);
                reqest.Method = "POST";
                reqest.ContentType = "application/json";
                Stream stream = reqest.GetRequestStream();
                byte[] bs = System.Text.Encoding.UTF8.GetBytes(data);
                stream.Write(bs, 0, bs.Length);
                stream.Flush();
                stream.Close();
                HttpWebResponse response = (HttpWebResponse)reqest.GetResponse();
                StreamReader sr = new StreamReader(response.GetResponseStream(), Encoding.UTF8);
                value = sr.ReadToEnd();
                response.Close();
                return value;
            }
            catch (Exception ex)
            {
                string error = ex.ToString();
                return error;
            }
        }