注意：截止最新稳定版 147.0.100，CEFSharp.OffScreen.NETCore包仅支持.NET 6.0-windows版本，后续 不知道会不会支持.NET 6.0以上版本

3、 设置为 STA 线程

1  class Program
2  {
3      [STAThread]
4      static async Task Main(string[] args)
5      {
6 
7      }
8 }

private static void BindBrowserEvent()
{
    // 页面加载完成
    _browser.LoadCompleted += (s, e) =>
    {
        Console.WriteLine($"页面加载完成：{e.Url} 状态：{e.HttpStatusCode}");
    };

    // 渲染画面回调（每一帧都会触发）
    _browser.Paint += (s, e) =>
    {
        // e.Bitmap 就是当前网页截图
        if (e.Bitmap != null)
        {
            // 只保存一次，避免频繁保存
            static bool saved = false;
            if (!saved)
            {
                e.Bitmap.Save("网页截图.png");
                saved = true;
                Console.WriteLine("截图已保存");
            }
        }
    };

    // JS控制台日志捕获
    _browser.ConsoleMessage += (s, e) =>
    {
        Console.WriteLine($"JS日志：{e.Message}");
    };
}

/// <summary>
/// 等待页面加载完成
/// </summary>
private static Task LoadUrlAsync(string url)
{
    var tcs = new TaskCompletionSource<bool>();
    void LoadComplete(object sender, LoadCompletedEventArgs e)
    {
        _browser.LoadCompleted -= LoadComplete;
        tcs.SetResult(true);
    }
    _browser.LoadCompleted += LoadComplete;
    _browser.Load(url);
    return tcs.Task;
}

private static async Task RunAllDemoFunc()
{
    // 1. 执行JS获取返回值
    var jsResult = await _browser.EvaluateScriptAsync("document.title");
    if (jsResult.Success)
    {
        Console.WriteLine("网页标题：" + jsResult.Result);
    }

    // 2. 点击页面元素（坐标点击）
    // x,y 网页相对坐标
    _browser.BrowserHost.SendMouseClickEvent(
        x: 120, y: 120, 
        mouseButtonType: MouseButtonType.Left, 
        mouseUp: false, clickCount: 1);

    await Task.Delay(200);
    _browser.BrowserHost.SendMouseClickEvent(
        120, 120, MouseButtonType.Left, true, 1);

    // 3. 输入键盘内容
    _browser.BrowserHost.SendKeyEvent(KeyEventType.KeyDown, (int)Keys.H);
    _browser.BrowserHost.SendKeyEvent(KeyEventType.Char, 'H');
    _browser.BrowserHost.SendKeyEvent(KeyEventType.KeyUp, (int)Keys.H);

    // 4. 网页后退/前进/刷新
    _browser.Back();
    _browser.Forward();
    _browser.Reload();

    // 5. 导出网页为PDF
    var pdfSettings = new PdfPrintSettings
    {
        Landscape = false,
        PrintBackground = true
    };
    await _browser.PrintToPdfAsync("网页导出.pdf", pdfSettings);
    Console.WriteLine("PDF导出完成");

    // 6. 设置Cookie
    var cookieManager = Cef.GetGlobalCookieManager();
    cookieManager.SetCookie("https://baidu.com", new Cookie
    {
        Name = "testCookie",
        Value = "123456",
        Domain = ".baidu.com"
    });

    // 7. 获取当前URL
    Console.WriteLine("当前地址：" + _browser.Address);
}

[STAThread]
static void ScreenshotDemo()
{
    var settings = new CefSettings { DisableGpu = true };
    Cef.Initialize(settings);

    using var browser = new ChromiumWebBrowser("https://www.qq.com", 1024, 768);
    browser.LoadCompleted += (s, e) =>
    {
        Task.Delay(1000).Wait();
    };

    browser.Paint += (s, e) =>
    {
        e.Bitmap?.Save("QQ截图.jpg");
        Console.WriteLine("截图完成");
    };

    System.Threading.Thread.Sleep(3000);
    browser.Dispose();
    Cef.Shutdown();
}