.Refresh();//刷新
.GoBack();//后退
.GoForward();//前进
.Navigate(new Uri(address)); //打开链接
.Dock = DockStyle.Fill; //完全停靠在父容器中
.ScriptErrorsSuppressed = true ; //关闭错误显示
Uri a = new Uri(WebBrowser.Document.ActiveElement.GetAttribute("href"));//获取点击中的链接地址

.Navigated += new WebBrowserNavigatedEventHandler(WebBrowser_Navigated);//加载中处理事件
.DocumentCompleted += new WebBrowserDocumentCompletedEventHandler(WebBrowser _DocumentCompleted);//页面加载完成处理事件
.NewWindow += new CancelEventHandler(WebBrowser _NewWindow);//新的窗口中打开页面

// Navigates to the given URL if it is valid.
private void Navigate(WebBrowser web,String address)
{
  if (String.IsNullOrEmpty(address)) return;
  if (address.Equals("about:blank")) return;
  if (!address.StartsWith("http://")) address = "http://" + address;
  try
  {
 WebBrowser.Navigate(new Uri(address));
    
  }
  catch (System.UriFormatException)
  {
 return;
  }
  // Updates the URL in TextBoxAddress upon navigation.
  private void webBrowser1_Navigated(object sender, WebBrowserNavigatedEventArgs e)
  {
   toolStripTextBox1.Text = WebBrowser.Url.ToString();
  }
}

private void WebBrowser_NewWindow(object sender, CancelEventArgs e)
{
  WebBrowser webb = new WebBrowser();
 
  WebBrowser = WebBrowsers[webtab.SelectedIndex];
  webb.Name = "webb" + webtab.TabCount;
  Uri a = new Uri(WebBrowser.Document.ActiveElement.GetAttribute("href"));    
  webb.Url = a;
  webb.Dock = DockStyle.Fill;
  TabPage p = new TabPage();      
  p.Controls.Add(webb);
  webtab.TabPages.Add(p);
  webtab.SelectedTab = p;
  webb.NewWindow += new CancelEventHandler(WebBrowser_NewWindow);
  
  e.Cancel = true;//取消在默认浏览器中打开    
}

#region 用户自动登陆
private void WebBrowser_DocumentCompleted(object sender, WebBrowserDocumentCompletedEventArgs e)
{
   HtmlDocument log_auto = WebBrowser.Document;
   HtmlElement log_btn = null;
 
    foreach (HtmlElement em in log_auto.All) //轮循
    {
       string str = em.Name;
       string id = em.Id;
       if ((str == "username") || (str == "password") || (str == "submit")) //减少处理
       {
          switch (str)
          {
            case "username": em.SetAttribute("value", usernamexml);
              break; //赋用户名
            case "password": em.SetAttribute("value", userpasswordxml );
              break; //赋密码
            case "submit": log_btn = em;
              break; //获取submit按钮
            default:
              break;
          }
        }
 
      }
      log_btn.InvokeMember("click"); //触发submit事件        
    }
#endregion