1、创建HttpWebRequest对象

HttpWebRequest对象用WebRequest.Create(url)方法获得。

2、初始化HttpWebRequest对象（设置http请求常用属性）

3、附加Post给服务器的数据到HttpWebRequest对象（写入HttpWebRequest对象提供的一个stream里面）

4、读取服务器的返回信息（注意返回数据的Encoding）

 

           string url = "";

            Encoding encoding = Encoding.GetEncoding("utf-8");

            byte[] bytesToPost = encoding.GetBytes("我学习WebRequest");

             string cookieheader = string.Empty;

            CookieContainer cookieCon = new CookieContainer();

            #region 创建HttpWebRequest对象

            HttpWebRequest httpRequest = (HttpWebRequest)WebRequest.Create(url);

            #endregion

            #region 初始化HtppWebRequest对象

            httpRequest.CookieContainer = cookieCon;

            httpRequest.UserAgent = "Mozilla/4.0 (compatible; MSIE 7.0; Windows NT 5.2; .NET CLR 1.1.4322; .NET CLR 2.0.50727)";

            httpRequest.ContentType = "application/x-www-form-urlencoded";

            httpRequest.Method = "POST";

 

            if (cookieheader.Equals(string.Empty))

               {

                   cookieheader = httpRequest.CookieContainer.GetCookieHeader(new Uri(Url));

               }

               else

               {

                   httpRequest.CookieContainer.SetCookies(new Uri(Url), cookieheader);

               }

            #endregion

 

            #region 附加Post给服务器的数据到HttpWebRequest对象

            httpRequest.ContentLength = bytesToPost.Length;

            System.IO.Stream requestStream = httpRequest.GetRequestStream();

            requestStream.Write(bytesToPost, 0, bytesToPost.Length);

            requestStream.Close();

            #endregion

          

           

            #region 读取服务器返回信息

            System.IO.Stream responseStream = httpRequest.GetResponse().GetResponseStream();

            string stringResponse = string.Empty;

            using (System.IO.StreamReader responseReader = new System.IO.StreamReader(responseStream, Encoding.UTF8))

            {

                stringResponse = responseReader.ReadToEnd();

            }

            responseStream.Close();

            #endregion

 

 

来源于：  BadBoy网络安全小组