string postURL ="http://xxxxx.ashx"; 　　　　List<string> paramName = new List<string>(); 　　　　List<string> paramValue = http://www.mamicode.com/new List<string>(); 　　　　paramName.Add("userName"); 　　　　paramName.Add("password"); 　　　　paramValue.Add("zhangsan"); 　　　　paramValue.Add("123456");　　　　　/// <summary>        /// http协议 get请求 接受返回结果        /// <para>创建作者：李勇</para>        /// <para>创建日期：2014-07-31</para>        /// </summary>        /// <param name="url"></param>        /// <param name="paramName"></param>        /// <param name="paramValue"></param>        /// <returns></returns>        protected string GetRequest(string url, List<string> paramName, List<string> paramValue)        {            string result = string.Empty;            try            {                if (paramName != null && paramValue != null)                {                    // 编辑并Encoding提交的数据                    StringBuilder sbuilder = new StringBuilder(paramName[0] + "=" + paramValue[0]);                    for (int i = 1; i < paramName.Count; i++)                        sbuilder.Append("&" + paramName[i] + "=" + paramValue[i]);                    url = url + "?" + sbuilder.ToString();                    var tokenRequest = (HttpWebRequest)WebRequest.Create(url);                    using (WebResponse tokenResponse = tokenRequest.GetResponse())                    {                        Stream stream = tokenResponse.GetResponseStream();                        if (stream != null)                        {                            using (var responseReader = new System.IO.StreamReader(stream, Encoding.UTF8))                            {                                result = responseReader.ReadToEnd();                            }                        }                    }                    return result;                }            }            catch (Exception ex)            {                if (ex == null)                    ex = null;            }            return result;        } 　　　　/// <summary>        /// http协议 post数据 接受返回结果        /// <para>创建作者：李勇</para>        /// <para>创建日期：2014-07-31</para>        /// </summary>        /// <param name="url"></param>        /// <param name="paramName"></param>        /// <param name="paramValue"></param>        /// <returns></returns>        protected string PostRequest(string url, List<string> paramName, List<string> paramValue)        {            string result = string.Empty;            try            {                if (paramName != null && paramValue != null)                {                    // 编辑并Encoding提交的数据                    StringBuilder sbuilder = new StringBuilder(paramName[0] + "=" + paramValue[0]);                    for (int i = 1; i < paramName.Count; i++)                        sbuilder.Append("&" + paramName[i] + "=" + paramValue[i]);                    byte[] data =http://www.mamicode.com/ Encoding.UTF8.GetBytes(sbuilder.ToString());                    // 发送请求                    System.Net.HttpWebRequest request = (System.Net.HttpWebRequest)System.Net.WebRequest.Create(url);                    request.Method = "POST";                    request.ContentType = "application/x-www-form-urlencoded";                    request.ContentLength = data.Length;                    using (Stream stream = request.GetRequestStream())                    {                        stream.Write(data, 0, data.Length);                        stream.Close();                    }                    // 获得回复                    System.Net.HttpWebResponse response = (System.Net.HttpWebResponse)request.GetResponse();                    using (StreamReader reader = new StreamReader(response.GetResponseStream(), Encoding.UTF8))                    {                        result = reader.ReadToEnd();                        reader.Close();                        response.Close();                    }                }            }            catch (Exception ex)            {            }            return result;        }