C# simulates browser to achieve automatic operation

        //Is the web page standard already loaded        private bool isLoadok = false;
        //First loading of web page standards        private bool firstLoaded = false;
        //Backend Service        private BackgroundWorker bgwork;
        public WebBrowserDemo()
        {
            InitializeComponent();
        }
 
        /// <summary>
        /// After the automatic form, load the web page and obtain network elements to achieve assignment, click operation        /// A WebBrowser control named webBrowser1 was added to the winform form        /// </summary>
        /// <param name="sender"></param>
        /// <param name="e"></param>
        private void Form1_Load(object sender, EventArgs e)
        {
            (new Action(() =>
            {
                bgwork = new BackgroundWorker();
                 += Bgwork_DoWork;
                 += Bgwork_RunWorkerCompleted;
                string url = "/";
                this. = true;
                this.(url);
                 += WebBrowser1_DocumentCompleted;
                ();
                Determine whether the web page is loading：Waiting doesn't work，Loading the web page，useDocumentCompletedevent
                //while (this. ||  != )
                //{
                //    (1000);
                //}
                //string search_id = "input";
                //string search_value = "*";                //string btn_id = "search-button";
                //HtmlDocument doc = this.;
                //HtmlElement search = (search_id);
                //("value", search_value);
                //HtmlElement btn = (btn_id);
                //("click");
            }));
        }
 
        /// <summary>
        /// WebBrowser loads the web page to complete the event        /// </summary>
        /// <param name="sender"></param>
        /// <param name="e"></param>
        private void WebBrowser1_DocumentCompleted(object sender, WebBrowserDocumentCompletedEventArgs e)
        {
 
            (new Action(() =>
            {
                if (this. == false &&  == && firstLoaded==false)
                {
                    firstLoaded=true;
                    string search_id = "input";
                    string search_value = "automation";
                    string btn_id = "search-button";
                    HtmlDocument doc = this.;
                    HtmlElement search = (search_id);
                    ("value", search_value);
                    HtmlElement btn = (btn_id);
                    ("click");
                }
 
            }));
        }
 
        /// <summary>
        /// Backend service completion event        /// </summary>
        /// <param name="sender"></param>
        /// <param name="e"></param>
        private void Bgwork_RunWorkerCompleted(object sender, RunWorkerCompletedEventArgs e)
        {
            this. += new HtmlElementErrorEventHandler(Window_Error);
            if( == )
            {
                isLoadok = true;
            }
            else
            {
                isLoadok = false;
            }
        }
 
        /// <summary>
        /// Loading web page error event        /// </summary>
        /// <param name="sender"></param>
        /// <param name="e"></param>
        private void Window_Error(object sender, HtmlElementErrorEventArgs e)
        {
             = true;
        }
 
        /// <summary>
        /// Backend service        /// </summary>
        /// <param name="sender"></param>
        /// <param name="e"></param>
        private void Bgwork_DoWork(object sender, DoWorkEventArgs e)
        {
            compWait();
        }
 
        /// <summary>
        /// Backend service method        /// </summary>
        private void compWait()
        {
            while(!isLoadok)
            {
                (500);
            }
        }

    private void btnLoad_Click(object sender, EventArgs e)
    {
        // Set Chrome options, optional        var options = new ChromeOptions();
        //("--headless"); // Headless mode, does not open the browser window 
        // Initialize WebDriver        IWebDriver driver = new ChromeDriver(options);
 
        try
        {
 
            // Open the web page            ().GoToUrl("/passport/login");
            //().Back();
            //().Refresh();
 
            // Wait for the page to load, know that the page is idle, and an exception is thrown after 10 seconds            //var wait = new WebDriverWait(driver, (10));
            //(());
 
            //Find the user input box and enter the user name            (("username")).SendKeys("Tom");
            //Find the password input box and enter the password            (("password")).SendKeys("123456");
            ().();
            Find the Submit button and click the Submit button
            //(("btn_login")).Click();
 
            // Get the page source code            string pageSource = ;
            (pageSource);
        }
        catch(Exception ex)
        {
            ();
        }
        finally
        {
             Clean up，Close the browser
            //();
        }
    }