httpwebrequest发送POST请求，获取返回的头部值，急！
用抓包软件（Fiddler2）可以得知发送的包是这样的（是一个登入页面，我输入了帐号密码）

Header里是这样的

POST /login HTTP/1.1
Accept: text/html, application/xhtml+xml, */*
Referer: 要登入的某网址/login
Accept-Language: zh-CN
User-Agent: Mozilla/5.0 (compatible; MSIE 9.0; Windows NT 6.1; Trident/5.0)
Content-Type: application/x-www-form-urlencoded
Accept-Encoding: gzip, deflate
Host: 要登入的某网址
Content-Length: 103
Connection: Keep-Alive
Pragma: no-cache
Cookie: PHPSESSID=9a73683e21399713d6cddb270ec16c08; cnzz_a30020080=1; sin30020080=; rtime30020080=0; ltime30020080=1331033172518; cnzz_eid30020080=87021669-1331032392-

Textview里显示

charset=utf-8&jumpurl=%2F&username=我的帐号&password=我的密码&rememberme=1&input2=%E7%99%BB+%E5%BD%95

我用httpwebrequest模拟这个数据包

C# code

HttpWebRequest requestCookies = (HttpWebRequest)WebRequest.Create(要登入的某网址);
requestCookies.ContentType = "application/x-www-form-urlencoded";
requestCookies.Referer = "要登入的某网址/login";
requestCookies.Headers.Set("Pragma", "no-cache");
requestCookies.Accept = "text/html, application/xhtml+xml, */*";
requestCookies.Headers.Set("Accept-Language", "zh-CN");
requestCookies.Headers.Set("Accept-Encoding", "gzip, deflate");
string temp = "PHPSESSID=22a234c094a7f36ba11e6d6767fc614c; cnzz_a30020080=0; sin30020080=; rtime30020080=0; ltime30020080=1330943336040; cnzz_eid30020080=78128217-1330939152-";
requestCookies.Headers.Set("cookie", temp);
requestCookies.Method = "POST";
                
Encoding encoding23 = Encoding.GetEncoding("utf-8");
byte[] bytesToPost = encoding23.GetBytes("charset=utf-8&jumpurl=%2F&username=帐号&password=密码&rememberme=1&input2=%E7%99%BB+%E5%BD%95");
requestCookies.ContentLength = bytesToPost.Length;
System.IO.Stream requestStream = requestCookies.GetRequestStream();
requestStream.Write(bytesToPost, 0, bytesToPost.Length);
requestStream.Close();


HttpWebResponse hwr = (HttpWebResponse)requestCookies.GetResponse();

WebHeaderCollection head = hwr.Headers;
IEnumerator iem = head.GetEnumerator();

ArrayList value = new ArrayList();

for (int i = 0; iem.MoveNext(); i++)
{
string key=head.GetKey(i);
value.Add(head.GetValues(key));
}  

string filePath2 = @"c:\infor2.txt";
FileStream fs2 = new FileStream(filePath2, FileMode.Open, FileAccess.ReadWrite);
StreamWriter sw2 = new StreamWriter(fs2);
fs2.SetLength(0);

for (int i = 0; i < value.Count; i++)
{
  sw2.WriteLine(value[i].ToString());
}

sw2.Close();

 

打开文件后我想看下里面的内容是否是我想要的结果（如下，抓包软件中抓的）

HTTP/1.1 200 OK
Server: [SA: new-server-50 ][AD: http://www.hoopchina.com ]
Date: Sun, 04 Mar 2012 08:20:53 GMT
Content-Type: text/html; charset=utf-8
Connection: keep-alive
Vary: Accept-Encoding
Expires: Thu, 19 Nov 1981 08:52:00 GMT
Cache-Control: no-store, no-cache, must-revalidate, post-check=0, pre-check=0
Pragma: no-cache
Set-Cookie: u=4673245%7CQW5ld19HLg%3D%3D%7Cedea%7C2635de86714644840c7e1d91f7f2b9be%7C714644840c7e1d91; path=/; domain=.hoopchina.com; httponly
Set-Cookie: ua=28931506; expires=Tue, 05-Mar-2013 08:20:53 GMT; path=/; domain=.hoopchina.com
Set-Cookie: g=deleted; expires=Sat, 05-Mar-2011 08:20:52 GMT; path=/; domain=.hoopchina.com; httponly
Content-Length: 2573

里面Set-cookie一些字符我后面的程序会用到

可是打开后确是这样

System.String[]
System.String[]
System.String[]
System.String[]
System.String[]
System.String[]
System.String[]
System.String[]
System.String[]
System.String[]
System.String[]

请问下哪里出了问题？
我发送POST及其内容的步骤有没哪里错了？