//是否已經(jīng)加載網(wǎng)頁標準
        private bool isLoadok = false;
        //首次加載網(wǎng)頁標準
        private bool firstLoaded = false;
        //后臺服務
        private BackgroundWorker bgwork;
        public WebBrowserDemo()
        {
            InitializeComponent();
        }
 
        /// <summary>
        /// 自動窗體后加載網(wǎng)頁并獲取網(wǎng)絡元素，實現(xiàn)賦值，點擊操作
        /// winform窗體上添加了一個名為webBrowser1的WebBrowser控件
        /// </summary>
        /// <param name="sender"></param>
        /// <param name="e"></param>
        private void Form1_Load(object sender, EventArgs e)
        {
            this.BeginInvoke(new Action(() =>
            {
                bgwork = new BackgroundWorker();
                bgwork.DoWork += Bgwork_DoWork;
                bgwork.RunWorkerCompleted += Bgwork_RunWorkerCompleted;
                string url = "https://www.so.com/";
                this.webBrowser1.ScriptErrorsSuppressed = true;
                this.webBrowser1.Navigate(url);
                webBrowser1.DocumentCompleted += WebBrowser1_DocumentCompleted;
                bgwork.RunWorkerAsync();
                判斷網(wǎng)頁是否加載完成：等待不起作用，一直在加載網(wǎng)頁，使用DocumentCompleted事件
                //while (this.webBrowser1.IsBusy || webBrowser1.ReadyState != WebBrowserReadyState.Complete)
                //{
                //    Thread.Sleep(1000);
                //}
                //string search_id = "input";
                //string search_value = "天安門";
                //string btn_id = "search-button";
                //HtmlDocument doc = this.webBrowser1.Document;
                //HtmlElement search = doc.GetElementById(search_id);
                //search.SetAttribute("value", search_value);
                //HtmlElement btn = doc.GetElementById(btn_id);
                //btn.InvokeMember("click");
            }));
        }
 
        /// <summary>
        /// WebBrowser加載網(wǎng)頁完成事件
        /// </summary>
        /// <param name="sender"></param>
        /// <param name="e"></param>
        private void WebBrowser1_DocumentCompleted(object sender, WebBrowserDocumentCompletedEventArgs e)
        {
 
            this.BeginInvoke(new Action(() =>
            {
                if (this.webBrowser1.IsBusy == false && webBrowser1.ReadyState == WebBrowserReadyState.Complete&& firstLoaded==false)
                {
                    firstLoaded=true;
                    string search_id = "input";
                    string search_value = "自動化";
                    string btn_id = "search-button";
                    HtmlDocument doc = this.webBrowser1.Document;
                    HtmlElement search = doc.GetElementById(search_id);
                    search.SetAttribute("value", search_value);
                    HtmlElement btn = doc.GetElementById(btn_id);
                    btn.InvokeMember("click");
                }
 
            }));
        }
 
        /// <summary>
        /// 后臺服務完成事件
        /// </summary>
        /// <param name="sender"></param>
        /// <param name="e"></param>
        private void Bgwork_RunWorkerCompleted(object sender, RunWorkerCompletedEventArgs e)
        {
            this.webBrowser1.Document.Window.Error += new HtmlElementErrorEventHandler(Window_Error);
            if(webBrowser1.ReadyState == WebBrowserReadyState.Complete)
            {
                isLoadok = true;
            }
            else
            {
                isLoadok = false;
            }
        }
 
        /// <summary>
        /// 加載網(wǎng)頁錯誤事件
        /// </summary>
        /// <param name="sender"></param>
        /// <param name="e"></param>
        private void Window_Error(object sender, HtmlElementErrorEventArgs e)
        {
            e.Handled = true;
        }
 
        /// <summary>
        /// 后臺服務
        /// </summary>
        /// <param name="sender"></param>
        /// <param name="e"></param>
        private void Bgwork_DoWork(object sender, DoWorkEventArgs e)
        {
            compWait();
        }
 
        /// <summary>
        /// 后臺服務方法
        /// </summary>
        private void compWait()
        {
            while(!isLoadok)
            {
                Thread.Sleep(500);
            }
        }

    private void btnLoad_Click(object sender, EventArgs e)
    {
        // 設置Chrome選項，可選
        var options = new ChromeOptions();
        //options.AddArgument("--headless"); // 無頭模式，不打開瀏覽器窗口
 
        // 初始化WebDriver
        IWebDriver driver = new ChromeDriver(options);
 
        try
        {
 
            // 打開網(wǎng)頁
            driver.Navigate().GoToUrl("https://account.chsi.com.cn/passport/login");
            //driver.Navigate().Back();
            //driver.Navigate().Refresh();
 
            // 等待頁面加載完成,知道頁面空閑，超時10s拋出異常
            //var wait = new WebDriverWait(driver, TimeSpan.FromSeconds(10));
            //wait.Until(SeleniumExtras.WaitHelpers.ExpectedConditions.BrowserIsNotBusy());
 
            //查找用戶輸入框并輸入用戶名
            driver.FindElement(By.Name("username")).SendKeys("Tom");
            //查找密碼輸入框并輸入密碼
            driver.FindElement(By.Name("password")).SendKeys("123456");
            driver.Manage().Window.Maximize();
            查找提交按鈕并點擊提交按鈕
            //driver.FindElement(By.ClassName("btn_login")).Click();
 
            // 獲取頁面源碼
            string pageSource = driver.PageSource;
            Console.WriteLine(pageSource);
        }
        catch(Exception ex)
        {
            Console.WriteLine(ex.Message);
        }
        finally
        {
             清理，關閉瀏覽器
            //driver.Quit();
        }
    }