string code_url = "https://mp.weixin.qq.com/cgi-bin/verifycode?username=" + that.acc.Text + "&r=" + (DateTime.Now.ToUniversalTime().Ticks - 621355968000000000) / 10000;
  

  //===================获取验证码=======================
  

  public void getVCode(string code_uri)
  

  {
  

  HttpWebRequest webRequest = (HttpWebRequest)WebRequest.Create(code_uri);
  

  webRequest.Accept = "image/webp,*/*;q=0.8";
  

  if (loginInfo.LoginCookie != null)
  

  webRequest.CookieContainer = loginInfo.LoginCookie;
  

  else
  

  webRequest.CookieContainer = cc;                                      //保存cookie
  

  

  webRequest.Method = "GET";                                          //请求方式是GET
  

  webRequest.AllowAutoRedirect = true;
  

  webRequest.Headers["Accept-Encoding"] = "xxxx,deflate";
  

  webRequest.Headers["Accept-Language"] = "zh-CN";
  

  webRequest.Headers["Connection"] = "keep-alive";
  

  webRequest.Headers["Referer"] = "https://mp.weixin.qq.com/";
  

  webRequest.Headers["Host"] = "mp.weixin.qq.com";
  

  webRequest.Headers["DNT"] = "1";
  

  webRequest.UserAgent = "Mozilla/5.0 (Windows; U; Windows NT 5.1; zh-CN; rv:1.9.1.5) Gecko/20091102 Firefox/3.5.5";
  

  IAsyncResult CodeResult = (IAsyncResult)webRequest.BeginGetResponse(new AsyncCallback(CodeReady), webRequest);
  

  }
  

  

  public void CodeReady(IAsyncResult CodeResult)
  

  {
  

  string u = ((DateTime.Now.ToUniversalTime().Ticks - 621355968000000000) / 10000).ToString();
  

  HttpWebRequest request = CodeResult.AsyncState as HttpWebRequest;
  

  HttpWebResponse response = (HttpWebResponse)request.EndGetResponse(CodeResult);
  

  using (Stream stream = response.GetResponseStream())
  

  {
  

  if (!Directory.Exists("VC"))
  

  {
  

  Directory.CreateDirectory("VC");
  

  }
  

  FileStream outStream = new FileStream("VC\\VCode"+u+".jpg", FileMode.Create);
  

  Int32 i = 0;
  

  //循环inStream，将内容写进outStream
  

  while (true)
  

  {
  

  i = stream.ReadByte();
  

  if (i != -1)
  

  {
  

  outStream.WriteByte((Byte)i);
  

  }
  

  else
  

  {
  

  break;
  

  }
  

  }
  

  //关闭文件
  

  outStream.Close();
  

  }
  

  // Deployment.Current.Dispatcher.BeginInvoke(() => { t.Text = text2; });
  

  Deployment.Current.Dispatcher.BeginInvoke(() => { that.vc.Source = new BitmapImage(new Uri("VC\\VCode" + u + ".jpg", UriKind.Relative)); that.showVCode(); });
  

  }
  

  //====================获取验证码=======================