static void Main(string[] args)
{
WebHeaderCollection Header = new WebHeaderCollection();
Header.Add(HttpRequestHeader.UserAgent, "Mozilla/5.0 (Windows NT 10.0; Win64; x64; rv:56.0) Gecko/20100101 Firefox/56.0");
Header.Add(HttpRequestHeader.Accept, "text/html,application/xhtml+xml,application/xml;q=0.9,*/*;q=0.8");
Header.Add(HttpRequestHeader.AcceptLanguage, "ru-RU,ru;q=0.8,en-US;q=0.5,en;q=0.3");
//Header.Add(HttpRequestHeader.AcceptEncoding, "gzip, deflate, br");
Header.Add(HttpRequestHeader.ContentType, "application/x-www-form-urlencoded");
Header.Add(HttpRequestHeader.Referer, "https://www.google.ru");
WebQuery avito = new WebQuery();
avito.Headers = Header;
avito.GET("https://www.avito.ru");
string kvartiry = avito.GET("https://www.avito.ru" + avito.ResponceUri.AbsolutePath + "/" + "kvartiry");
HtmlDocument hiddenFieldsString = new HtmlDocument();
hiddenFieldsString.LoadHtml(kvartiry);
NameValueCollection filter = new NameValueCollection();
string sField = hiddenFieldsString.DocumentNode.SelectSingleNode("//input[@name='s']").GetAttributeValue("value", "101");
string tokenValueField = hiddenFieldsString.DocumentNode.SelectSingleNode("//input[@class='js-token']").GetAttributeValue("value", "0");
string tokenNameField = hiddenFieldsString.DocumentNode.SelectSingleNode("//input[@class='js-token']").GetAttributeValue("name", "token[0]");
string sgtdField = hiddenFieldsString.DocumentNode.SelectSingleNode("//input[@name='sgtd']").GetAttributeValue("value", "");
filter.Add("s", sField);
//filter.Add(Ke)
filter.Add(tokenNameField, tokenValueField);
filter.Add("sgtd", sgtdField);
filter.Add("category_id", "24");
filter.Add("location_id", "637640");//"641780"
filter.Add("name", "");
filter.Add("params[201]", "");
filter.Add("pmin", "");
filter.Add("pmax", "");
filter.Add("bt", "on");
string filt = avito.GetPostBody(filter);
string aprtments = avito.POST("https://www.avito.ru/search", filter);
Avito av = new Avito();
//av.SetFilter("Квартиры");
av.Query.Headers = Header;
string w = av.GetFilterParams(24);
av.Filter.Add("category_id", "24");
av.Filter.Add("location_id", "641780");
av.Filter.Add("name", "");
av.Filter.Add("params[201]", "");
av.Filter.Add("pmin", "");
av.Filter.Add("pmax", "");
string filt1 = av.Query.GetPostBody(av.Filter.Params);
string aprtments1 = avito.POST("https://www.avito.ru/search", av.Filter.Params);
HtmlDocument pages = new HtmlDocument();
pages.LoadHtml(aprtments1);
int pageNumber = 0;
HtmlNodeCollection maxPageNumber = pages.DocumentNode.SelectNodes("//a[@class='pagination-page']");
pageNumber = maxPageNumber.Count == 0 ? 1 :Convert.ToInt32(Regex.Match(maxPageNumber[maxPageNumber.Count - 1].GetAttributeValue("href", "1"), @"(?<=[\s\S]*?p=)[\s\S]+").Value);
string p2 = avito.GET(avito.ResponceUri + "?p=2");
//for (int i=1;i<=)
}
