如何让C# Webbrowser处理网页抓取的网页登录弹出窗口

webBrowser1.NewWindow += new CancelEventHandler(webBrowser1_NewWindow);

private void webBrowser1_NewWindow(object sender, CancelEventArgs e)
{
    WebBrowser newBrowser = new WebBrowser();
    newBrowser.Parent = this;
    newBrowser.Dock = DockStyle.Fill;
    e.Cancel = true;
    e.WebBrowser = newBrowser;
}

private void webBrowser1_NewWindow(object sender, CancelEventArgs e)
{
    // 创建新的WebBrowser控件
    WebBrowser newBrowser = new WebBrowser();
    newBrowser.Parent = this;
    newBrowser.Dock = DockStyle.Fill;
    e.Cancel = true;
    e.WebBrowser = newBrowser;

    // 处理登录弹出窗口
    if (e.Url.ToString() == "登录窗口的URL")
    {
        // 自动填写用户名和密码
        newBrowser.Document.GetElementById("username").SetAttribute("value", "your_username");
        newBrowser.Document.GetElementById("password").SetAttribute("value", "your_password");

        // 模拟点击登录按钮
        newBrowser.Document.GetElementById("loginButton").InvokeMember("click");
    }
}