post提交获得html页面源码的实现代码

本文主要和大家分享post提交获得html页面源码的实现代码，希望能帮助到大家。

/// 
        /// 获得页面的html源码  主要用于后台生成静态文件时获得源码        /// 
        ///         ///         public static string GetPageHTML(string url)        {            string httpString = string.Empty;            WebRequest request = WebRequest.Create(url);            request.Timeout = 200000;                        using (HttpWebResponse response = (HttpWebResponse)request.GetResponse())            {                if (response.StatusDescription.ToLower().Equals("ok"))                {                    using (StreamReader writer = new StreamReader(response.GetResponseStream(), Encoding.GetEncoding("GB2312")))                    {                        httpString = writer.ReadToEnd();                    }                }            }            return httpString;        }          /// 
        /// 获得页面的html源码  主要用于后台生成静态文件时获得源码UTF-8        /// 
        ///         ///         public static string GetPageHTMLUTF8(string url)        {            string httpString = string.Empty;            WebRequest request = WebRequest.Create(url);            request.Timeout = 200000;                        using (HttpWebResponse response = (HttpWebResponse)request.GetResponse())            {                if (response.StatusDescription.ToLower().Equals("ok"))                {                    using (StreamReader writer = new StreamReader(response.GetResponseStream(), Encoding.GetEncoding("UTF-8")))                    {                        httpString = writer.ReadToEnd();                    }                }            }            return httpString;        }          /// 
        /// post提交JSON数据。支持.net4.0及以下的版本        /// 
        ///         ///         ///         public static string GetHtmlByJson(string url, string json = "")        {            var result = string.Empty;             try            {                var request = WebRequest.Create(url) as HttpWebRequest;                request.ContentType = "text/json";                request.Method = "post";                //request.CookieContainer = _cookie;                 using (var streamWriter = new StreamWriter(request.GetRequestStream()))                {                    streamWriter.Write(json);                    streamWriter.Flush();                    streamWriter.Close();                     var response = (HttpWebResponse)request.GetResponse();                     using (var reader = new StreamReader(response.GetResponseStream()))                    {                        result = reader.ReadToEnd();                    }                }            }            catch (UriFormatException uex)            {                // 出错处理            }             return result;        }         /// 
         /// 利用WebClient 远程POST数据并返回数据         /// 
         /// 远程URL地址         /// 参数，要提交的JSON字符串         /// POST数据的编码         /// 获取数据的编码         ///          public static string PostData(string strUrl, string strParams, Encoding RespEncode, Encoding ReqEncode)        {            /**             * 本函数只支持.net4.5以上的框架            HttpClient httpclient = new HttpClient();            try            {                //打开页面                 httpclient.Credentials = CredentialCache.DefaultCredentials;                //从指定的URI下载资源                 byte[] responseData = httpclient.DownloadData(strUrl);                string srcString = RespEncode.GetString(responseData);                 httpclient.Headers.Add("Content-Type", "application/x-www-form-urlencoded");                string postString = strParams;                // 将字符串转换成字节数组                 byte[] postData = Encoding.ASCII.GetBytes(postString);                // 上传数据，返回页面的字节数组                 responseData = httpclient.UploadData(strUrl, "POST", postData);                srcString = ReqEncode.GetString(responseData);                 return srcString;            }            catch (Exception ex)            {                //记录异常日志                 //释放资源                 httpclient.Dispose();                return string.Empty;            }            */            return "";        }          /// 
        /// 执行POST提交范例        /// 
        ///         /// "LoginName=365admin&Password=fob123"        ///         public static string PostPageHTMLUTF8(string url, string postdata)        {            WebClient client = new WebClient();            System.Collections.Specialized.NameValueCollection list = new System.Collections.Specialized.NameValueCollection();                        list.Add("opencheckindatatype", "3");            list.Add("starttime", "1492617600");            list.Add("endtime", "1492790400");            // "useridlist": ["james","paul"]                          list.Add("useridlist", "['TuHuaXing']");                        byte[] j = client.UploadValues(url, list);            //var dec = BitConverter.ToInt64(j,0);            //string jS = BitConverter.ToString(j);            //jS = Convert.ToString(jS,10);            return System.Text.Encoding.Default.GetString(j);             //目标页面获取值   request.form["id"]             /**            WebRequest request7 = WebRequest.Create(url);            request7.Method = "POST";             //post传参数                        byte[] bytes = Encoding.ASCII.GetBytes(postdata);            request7.ContentType = "application/x-www-form-urlencoded";            request7.ContentLength = postdata.Length;            request7.S            Stream sendStream = request7.GetRequestStream();            sendStream.Write(bytes, 0, bytes.Length);            sendStream.Close();             //得到返回值              WebResponse response7 = request7.GetResponse();            string OrderQuantity = new StreamReader(response7.GetResponseStream(), Encoding.GetEncoding("utf-8")).ReadToEnd();            return OrderQuantity;            //转化成json对象处理            //List getOrderQuantity = sr.Deserialize<List>(OrderQuantity);            **/        }

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