Post submission to obtain the implementation code of the html page source code

This article mainly shares with you the implementation code of post submission to obtain the source code of the html page. I hope it can help everyone.

/// <summary>        /// 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        /// </summary>        /// <param name="url"></param>        /// <returns></returns>        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;
        }
 
 
        /// <summary>        /// 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        /// </summary>        /// <param name="url"></param>        /// <returns></returns>        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;
        }
 
 
        /// <summary>        /// post提交JSON数据。支持.net4.0及以下的版本        /// </summary>        /// <param name="url"></param>        /// <param name="json"></param>        /// <returns></returns>        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;
        }
 
        /// <summary>         /// 利用WebClient 远程POST数据并返回数据         /// </summary>         /// <param name="strUrl">远程URL地址</param>         /// <param name="strParams">参数，要提交的JSON字符串</param>         /// <param name="RespEncode">POST数据的编码</param>         /// <param name="ReqEncode">获取数据的编码</param>         /// <returns></returns>         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 "";
        }
 
 
        /// <summary>        /// 执行POST提交范例        /// </summary>        /// <param name="url"></param>        /// <param name="postdata">"LoginName=365admin&Password=fob123"</param>        /// <returns></returns>        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> getOrderQuantity = sr.Deserialize<List<GetOrderQuantity>>(OrderQuantity);            **/        }

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