C# HttpWebRequest 绝技

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如果要使用中间的方法的话，可以访问我的帮助类完全免费开源：C# HttpHelper,帮助类,真正的Httprequest请求时无视编码，无视证书，无视Cookie,网页抓取

1.第一招，根据URL地址获取网页信息

   先来看一下代码

get方法

 public static string GetUrltoHtml(string Url,string type)

        {

            try

            {

                System.Net.WebRequest wReq = System.Net.WebRequest.Create(Url);

                // Get the response instance.

                System.Net.WebResponse wResp = wReq.GetResponse();

                System.IO.Stream respStream = wResp.GetResponseStream();

                // Dim reader As StreamReader = New StreamReader(respStream)

                using (System.IO.StreamReader reader = new System.IO.StreamReader(respStream, Encoding.GetEncoding(type)))
                {
                    return reader.ReadToEnd();
                }

            }

            catch (System.Exception ex)

            {

                //errorMsg = ex.Message;

            }

            return "";

        }

post方法

  ///<summary>

        ///采用https协议访问网络

        ///</summary>

        ///<param name="URL">url地址</param>

        ///<param name="strPostdata">发送的数据</param>

        ///<returns></returns>

        public string OpenReadWithHttps(string URL, string strPostdata, string strEncoding)

        {

            Encoding encoding = Encoding.Default;

            HttpWebRequest request = (HttpWebRequest)WebRequest.Create(URL);

            request.Method = "post";

            request.Accept = "text/html, application/xhtml+xml, */*";

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

            byte[] buffer = encoding.GetBytes(strPostdata);

            request.ContentLength = buffer.Length;

            request.GetRequestStream().Write(buffer, 0, buffer.Length);

            HttpWebResponse response = (HttpWebResponse)request.GetResponse();

            using( StreamReader reader = new StreamReader(response.GetResponseStream(), System.Text.Encoding.GetEncoding(strEncoding)))

              {

                   return reader.ReadToEnd();

              }

        }

 

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