C#模拟提交表单，已登陆的用户cookie传送,返回到登陆页面

string strcok = "cookie";
ServicePointManager.ServerCertificateValidationCallback = new System.Net.Security.RemoteCertificateValidationCallback(CheckValidationResult);
ServicePointManager.SecurityProtocol = SecurityProtocolType.Ssl3;
HttpWebRequest request = (HttpWebRequest)WebRequest.Create(url);
CookieContainer cookie = new CookieContainer();
request.CookieContainer=cookie;//如果用不到Cookie，删去即可
//以下是发送的http头，随便加，其中referer挺重要的，有些网站会根据这个来反盗链
request.Referer = referer;
request.Accept = "Accept:text/html,application/xhtml+xml,application/xml;q=0.9,image/webp,*/*;q=0.8";
request.Headers["Accept-Language"] = "zh-CN,zh;q=0.8";
request.Headers["Accept-Charset"] = "GBK,utf-8;q=0.7,*;q=0.3";
request.Headers["Cookie"] = strcok;
request.UserAgent = "User-Agent:Mozilla/5.0 (Windows NT 6.1; WOW64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/41.0.2272.101 Safari/537.36";

request.KeepAlive = true;
//上面的http头看情况而定，但是下面俩必须加
request.ContentType = "application/x-www-form-urlencoded";
request.Method = "POST";

string postString = "companyName=阔海玻璃";//这里即为传递的参数，可以用工具抓包分析，也可以自己分析，主要是form里面每一个name都要加进来
byte[] postData = Encoding.UTF8.GetBytes(postString);//编码，尤其是汉字，事先要看下抓取网页的编码方式

Encoding encoding = Encoding.UTF8;//根据网站的编码自定义
//byte[] postData = encoding.GetBytes(postDataStr);//postDataStr即为发送的数据，格式还是和上次说的一样
request.ContentLength = postData.Length;
Stream requestStream = request.GetRequestStream();
requestStream.Write(postData, 0, postData.Length);

HttpWebResponse response = (HttpWebResponse)request.GetResponse();

Stream responseStream = response.GetResponseStream();
//如果http头中接受gzip的话，这里就要判断是否为有压缩，有的话，直接解压缩即可
if (response.Headers["Content-Encoding"] != null && response.Headers["Content-Encoding"].ToLower().Contains("gzip"))
{
responseStream = new GZipStream(responseStream, CompressionMode.Decompress);
}

StreamReader streamReader = new StreamReader(responseStream, encoding);
string ck = response.Headers.Get("Set-Cookie");
string retString = streamReader.ReadToEnd();

你代码不都写了吗。还要干什么啊。无非就是分析下retString里的内容

你说呢...