本文地址：http://www.cnblogs.com/atree/archive/2010/04/20/WinFrom-GetPost-Cookie.html

注意Cookie的绑定，此处Cookie为获取验证码时记录的Cookie值。

 #region 提交数据方法// 公用Cookie信息public static CookieContainer myCookie;//返回的Html代码或结果public static string html;/// <summary>/// Get方式提交/// </summary>/// <param name="strUrl">目的资源链接</param>/// <returns>String:Response返回值</returns>public static string GetModel(string strUrl, string server){string strRet = null;try{HttpWebRequest request = (HttpWebRequest)WebRequest.Create(strUrl);request.Timeout = 2000; HttpWebResponse response = (HttpWebResponse)request.GetResponse();System.IO.Stream resStream = response.GetResponseStream();Encoding encode = System.Text.Encoding.UTF8;StreamReader readStream = new StreamReader(resStream, encode);Char[] read = new Char[256];int count = readStream.Read(read, 0, 256);while (count > 0){String str = new String(read, 0, count);strRet = strRet + str;count = readStream.Read(read, 0, 256);}resStream.Close();}catch (Exception e){strRet = "";}return strRet;}/// <summary>/// 绑定Cookie、获取验证码/// </summary>/// <param name="strUrl">链接地址（验证码获取地址）</param>/// <param name="server">Referer地址</param>/// <returns>Stream:验证码的数据流</returns>public static Stream GetModelStream(string strUrl, string server)//, string proxy, bool isProxy){System.IO.Stream resStream = null;string cookie;try{HttpWebRequest httpRequest = (HttpWebRequest)HttpWebRequest.Create(strUrl);httpRequest.Timeout = 2000;httpRequest.Accept = "image/gif, image/x-xbitmap, image/jpeg, image/pjpeg, application/x-shockwave-flash, application/vnd.ms-excel, application/vnd.ms-powerpoint, application/msword, */*";httpRequest.Referer = server;httpRequest.UserAgent = "Mozilla/4.0 (compatible; MSIE 6.0; Windows NT 5.1; SV1; Maxthon; .NET CLR 1.1.4322)";HttpWebResponse httpResponse = (HttpWebResponse)httpRequest.GetResponse();cookie = httpResponse.Headers.Get("Set-Cookie");myCookie = new CookieContainer();myCookie.SetCookies(new Uri(server), cookie);resStream = httpResponse.GetResponseStream();}catch { }return resStream;}/// <summary>/// Post方法提交/// </summary>/// <param name="strUrl">目的资源链接</param>/// <param name="strParm">传递的参数和值</param>/// <returns>String:Response返回值</returns>public static string PostModel(string strUrl, string server, string strParm){Encoding encode = System.Text.Encoding.UTF8;byte[] arrB = encode.GetBytes(strParm);HttpWebRequest myReq = (HttpWebRequest)WebRequest.Create(strUrl);myReq.Method = "POST";myReq.ContentType = "application/x-www-form-urlencoded";myReq.Timeout = 2000;myReq.Referer = server;myReq.UserAgent = "Mozilla/4.0 (compatible; MSIE 6.0; Windows NT 5.1; SV1; Maxthon; .NET CLR 1.1.4322)";myReq.ContentLength = arrB.Length;myReq.CookieContainer = myCookie;Stream outStream = myReq.GetRequestStream();outStream.Write(arrB, 0, arrB.Length);outStream.Close();WebResponse myResp = null;try{//接收HTTP做出的响应       myResp = myReq.GetResponse();}catch (Exception e){}Stream ReceiveStream = myResp.GetResponseStream();StreamReader readStream = new StreamReader(ReceiveStream, encode);Char[] read = new Char[256];int count = readStream.Read(read, 0, 256);string str = null;while (count > 0){str += new String(read, 0, count);count = readStream.Read(read, 0, 256);}readStream.Close();myResp.Close();return str;}#endregion