C# winform如何取到一个网页的值

我对网页操作不是很熟悉,我大概想要实现的功能就是
取http-://bns.plaync.-com/api/launcher/launcher?serverType=live
用IE的内核打开是需要下载的，用火狐之类打开可以直接看到值
我就是想取这个网页的内容
我尝试过用webBrowser,但是一旦成功登录后使用Navigate,就会直接像IE那样弹下载,
后来我想过用ajax的跨域取网页元素

 function writeSource() {     if (xmlHttp.readyState == 4) {         alert(xmlHttp.responseText);     } }   xmlHttp = new XMLHttpRequest(); xmlHttp.onreadystatechange = writeSource; xmlHttp.open('GET', 'http://bns.plaync.com/api/launcher/launcher?serverType=live', true);     xmlHttp.send(null);

但是调用open的时候失败，跨域也失败了。在火狐上是成功了的……
然后我试过用webclient，但是因为登录的时候是https的，所以也不成功
我尝试用WebRequest,但是没法进行操作登录，里面的post加密有几个参数我搞不定……论文网 
后来我又想过用webBrowser登录成功后产生cookie,然后把这个cookie转换成WebRequest用的cookie

 CookieContainer CCArray = new CookieContainer(); string strCookie = webBrowser1.Document.Cookie; string[] cookstr = strCookie.Split(';'); foreach (string str in cookstr) {      string[] cookValueName = str.Split('=');      Cookie ck = new Cookie(cookValueName[0].Trim().ToString(),cookValueName[1].Trim().ToString());        ck.Domain = "bns.plaync.com";        CCArray.Add(ck);  }

但是我加入到WebRequest的时候又来一个异常,对象未实例化。
最后我找一下百度+谷歌，找到了一个屏蔽下载，自动下载到本地，我再读取的。
后面看了下，又是webBrowser+Webclient下载的功能,结果还是因为没cookie，所以下载的是错误的文件。实在没辙了。
问题:不知道能不能在webBrowser1下取到http:-//bns.plaync.-com/api/launcher/launcher?serverType=live这个的值,他打开要下载
 static void Main(string[] args)         {             Console.WriteLine(Getpage());             Console.Read();         }           static string Getpage()         {             System.IO.Stream response;             System.IO.StreamReader sr;             string result = string.Empty;             string domain = "http:-//bns.plaync.-com/api/launcher/launcher?serverType=live";             HttpWebRequest request = (HttpWebRequest)WebRequest.Create(domain);             request.Method = "GET";             request.Accept = "text/html,application/xhtml+xml,application/xml;q=0.9,*/*;q=0.8";             request.Headers.Set("Accept-Charset", "GBK,utf-8;q=0.7,*;q=0.3");                       request.Headers.Set("Accept-Language", "zh-cn,zh;q=0.5");             request.Headers.Set("Accept-Encoding", "gzip,deflate,sdch");             request.Host = "bns.plaync.com";                        request.UserAgent = "Mozilla/5.0 (Windows NT 6.1; WOW64) AppleWebKit/536.11 (KHTML, like Gecko) Chrome/20.0.1132.47 Safari/536.11";                        request.KeepAlive = true;             HttpWebResponse httprp = (HttpWebResponse)request.GetResponse();             httprp.Headers.Set("Content-Encoding", "gzip");             //获取cookie的响应头->最好还是写一个cookie             //httprp.Headers[""];             response = httprp.GetResponseStream();             sr = new System.IO.StreamReader(response,Encoding.UTF8);                      result = sr.ReadToEnd();             response.Close();             sr.Close();             return result;         }

CookieContainer CCArray = new CookieContainer(); string strCookie = webBrowser1.Document.Cookie; string[] cookstr = strCookie.Split(';'); foreach (string str in cookstr) {      string[] cookValueName = str.Split('=');      Cookie ck = new Cookie(cookValueName[0].Trim().ToString(),cookValueName[1].Trim().ToString());        ck.Domain = "bns.plaync.com";        CCArray.Add(ck);  } 

你确认一下每一个cookie的domain是否都是bns.plaync.com 会不会存在不一样的。

我比较看好。

webbroser登录取cookie然后给httpwebrequest,或webclient这种方法。