有人可以帮助解析网站。我已经解析了很多站点，但是这个很有趣，内部代码是使用 php 文件动态生成的。所以我尝试像这样使用 WebClient：
WebClient client = new WebClient();
string postData = "getProducts=1&category=340&brand=0";
byte[] byteArray = Encoding.UTF8.GetBytes(postData);
client.Headers.Add("POST", "/ajax.php HTTP/1.1");
client.Headers.Add("Host", site);
client.Headers.Add("Connection", "keep-alive");
client.Headers.Add("Origin", "http://massup.ru");
client.Headers.Add("X-Requested-With", "XMLHttpRequest");
client.Headers.Add("User-Agent", "Mozilla/5.0 (Windows NT 6.1) AppleWebKit/536.11 (KHTML, like Gecko) Chrome/20.0.1132.57 Safari/536.11");
client.Headers.Add("Accept", "*/*");
client.Headers.Add("Content-Type", "application/x-www-form-urlencoded");
client.Headers.Add("Content-length", byteArray.Length.ToString());
client.Headers.Add("Referer", "http://massup.ru/category/proteini");
client.Headers.Add("Accept-Encoding", "gzip,deflate,sdch");
client.Headers.Add("Accept-Language", "ru-RU,ru;q=0.8,en-US;q=0.6,en;q=0.4");
client.Headers.Add("Accept-Charset", "windows-1251,utf-8;q=0.7,*;q=0.3");
client.Headers.Add("Cookie", "cart=933a71dfee2baf8573dfc2094a937f0d; r_v=YToyOntpOjA7YTo3OntzOjU6Im1vZGVsIjtzOjI2OiIxMDAlIFdoZXkgUHJvdGVpbiA5MDgg0LPRgCI7czozOiJ1cmwiO3M6MzQ6Im11bHRpcG93ZXItMTAwLXdoZXktcHJvdGVpbi05MDgtZ3IiO3M6NToiYnJhbmQiO3M6MTA6Ik11bHRpcG93ZXIiO3M6ODoiY2F0ZWdvcnkiO3M6Mzk6ItCh0YvQstC%2B0YDQvtGC0L7Rh9C90YvQtSDQuNC30L7Qu9GP0YLRiyI7czo5OiJzY2F0ZWdvcnkiO3M6Mzc6ItCh0YvQstC%2B0YDQvtGC0L7Rh9C90YvQuSDQuNC30L7Qu9GP0YIiO3M6NToicHJpY2UiO3M6MToiMCI7czo0OiJpY29uIjtzOjM3OiJodHRwOi8vbWFzc3VwLnJ1L2ltYWdlcy9pY29uXzQ3NTIuanBnIjt9aToxO2E6Nzp7czo1OiJtb2RlbCI7czoxNzoiTWF0cml4IDIuMCA5ODQg0LMiO3M6MzoidXJsIjtzOjE2OiJtYXRyaXgtMi0wLTk4NC1nIjtzOjU6ImJyYW5kIjtzOjc6IlN5bnRyYXgiO3M6ODoiY2F0ZWdvcnkiO3M6Mzk6ItCh0YvQstC%2B0YDQvtGC0L7Rh9C90YvQtSDQuNC30L7Qu9GP0YLRiyI7czo5OiJzY2F0ZWdvcnkiO3M6Mzc6ItCh0YvQstC%2B0YDQvtGC0L7Rh9C90YvQuSDQuNC30L7Qu9GP0YIiO3M6NToicHJpY2UiO3M6NDoiMTE5MCI7czo0OiJpY29uIjtzOjM3OiJodHRwOi8vbWFzc3VwLnJ1L2ltYWdlcy9pY29uXzEwMDguanBnIjt9fQ%3D%3D; PHPSESSID=933a71dfee2baf8573dfc2094a937f0d");
Stream data = client.OpenRead("http://massup.ru/ajax.php");
StreamReader reader = new StreamReader(data);
string s = reader.ReadToEnd();
Console.WriteLine(s);
data.Close();
reader.Close();
但它给了我一个错误！
有人可以帮助我进行这种解析。