c#中WebBrowser控件使用心得

1、WebBrowser常用属性

.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

2、WebBrowser常用事件处理

.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

3、事件处理函数

3.1、打开新连接

        // 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();

           }

        }

3.2、新窗口处理

        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        

        }

3.3、用户自动登陆处理

#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