C#程序后台访问URL接口方法

        /// <summary>
        /// 请求url并返回请求结果
        /// </summary>
        /// <param name="url">地址</param>
        /// <param name="pars">参数，json或url参数形式</param>
        /// <param name="dataEncode">编码类型</param>
        /// <param name="method">请求方式</param>
        /// <returns></returns>
        public static string GetURLResult(string url, string pars, Encoding dataEncode, string method = "GET")
        {
                string strMsg = "";
                try
                {
                    WebRequest request = WebRequest.Create(method.ToUpper() == "GET" ? (url + (url.IndexOf('?') > -1 ? "&" : "?") + pars) : url);
                    request.Method = method.ToUpper();
                    if (method.ToUpper() == "POST")
                    {
                        byte[] byteArray = dataEncode.GetBytes(pars); //转化
                        request.ContentLength = byteArray.Length;
                        Stream newStream = request.GetRequestStream();
                        newStream.Write(byteArray, 0, byteArray.Length);//写入参数
                        newStream.Close();
                    }
                    WebResponse response = request.GetResponse();
                    StreamReader reader = new StreamReader(response.GetResponseStream(), dataEncode);
                    strMsg = reader.ReadToEnd();
                    reader.Close();
                    reader.Dispose();
                    response.Close();