WebBrowser 控件获取POST数据

WebBrowser 其实是对 ActiveX 控件 SHDocVw 的封装，而这个SHDocVw的很多底层调用WebBrowser控件并没有提供实现，你这个应用需要直接操作 SHDoceVw 控件才可以。操作方法如下：

1、在 windows/system32 目录下找到 shdocvw.dll 这个动态库，将其添加到引用中

2、在 Form1_Load 中添加如下语句

            SHDocVw.WebBrowser wb = (SHDocVw.WebBrowser)webBrowser1.ActiveXInstance;
            wb.BeforeNavigate2 += new DWebBrowserEvents2_BeforeNavigate2EventHandler(WebBrowser_BeforeNavigate2);
3、添加如下成员函数

private void WebBrowser_BeforeNavigate2(object pDisp, ref object URL, ref object Flags, 
ref object TargetFrameName, ref object PostData, ref object Headers, ref bool Cancel)
{
string postDataText = System.Text.Encoding.ASCII.GetString(PostData as byte[]);
}

完成上述3步后，你post 数据时， 就会响应 BeforeNavigate2 事件，

postDataText 中就是你post的数据。

1.在WebBrowser中获取Cookie

CookieContainer myCookieContainer = new CookieContainer();

string cookieStr = webBrowser1.Document.Cookie;
string[] cookstr = cookieStr.Split(';');
foreach (string str in cookstr)
{
    string[] cookieNameValue = str.Split('=');
    Cookie ck = new Cookie(cookieNameValue[0].Trim ().ToString(), cookieNameValue[1].Trim ().ToString());
    ck.Domain = "www.google.com ";
    myCookieContainer.Add(ck);
}

WebClient设置cookie!
WebClient wc = new WebClient();
wc.Headers.Add("Cookie", "PHPSESSID=" + cookie + ";");
// 注意，这里是Cookie，不是Set-Cookie
byte[] re = wc.UploadData(Global.RootPath + "test.php", new byte[0]);
System.Text.UTF8Encoding converter = new System.Text.UTF8Encoding();
string str = converter.GetString(re);

2. 在WebBrowser中设置Cookie
public partial class WebBrowserControl : Form
{
        private String url;

        [DllImport("wininet.dll", CharSet = CharSet.Auto, SetLastError = true)]
        public static extern bool InternetSetCookie(string lpszUrlName, string lbszCookieName, string lpszCookieData);

        public WebBrowserControl(String path)
        {
            this.url = path;
            InitializeComponent();

            // set cookie
            InternetSetCookie(url, "JSESSIONID", Globals.ThisDocument.sessionID);

            // navigate
            webBrowser.Navigate(url);
        }        
}

3.将WebBrowser的cookie信息传给HttpWebRequest

先建一个"CookieContainer" 把WebBrowser中的Cookie保存在里面

//在WebBrowser中登录cookie保存在WebBrowser.Document.Cookie中     
CookieContainer myCookieContainer = new CookieContainer();

//String 的Cookie　要转成　Cookie型的　并放入CookieContainer中
string cookieStr = webBrowser1.Document.Cookie;
string[] cookstr = cookieStr.Split(';');

foreach (string str in cookstr)
{
    string[] cookieNameValue = str.Split('=');
    Cookie ck = new Cookie(cookieNameValue[0].Trim().ToString(), cookieNameValue[1].Trim().ToString());
    ck.Domain = "www.abc.com";// 必须写对
    myCookieContainer.Add(ck);
}

HttpWebRequest hreq = (HttpWebRequest)HttpWebRequest.Create("http://www.abc.com/search.asp ");
hreq.Method = "POST";
hreq.ContentType = "application/x-www-form-urlencoded";
         
//自己创建的CookieContainer
hreq.CookieContainer = myCookieContainer;
         
string postdata = "id=2005&action=search&name=";
byte[] byte1 = Encoding.ASCII.GetBytes(postdata);
hreq.ContentLength = byte1.Length;
          
Stream poststream = hreq.GetRequestStream();
poststream.Write(byte1, 0, byte1.Length);
poststream.Close();
      
HttpWebResponse hres = (HttpWebResponse)hreq.GetResponse();