cefsharp 循环从多个页面提取数据

foreach (var url in urls)
{
    var loaded = false;
    Action<object, FrameLoadEndEventArgs> frameLoadEndProc = (s, args) =>
    {
        if (args.Frame.IsMain && args.Frame.Url == url.Value)
        {
            loaded = true;
        }
    };

    var frameLoadEndEventHandler = new EventHandler<FrameLoadEndEventArgs>(frameLoadEndProc);

    // 订阅事件处理程序
    browser.FrameLoadEnd += frameLoadEndEventHandler;

    //加载url并等待完成
    browser.Load(url);

    var start = DateTime.Now;
    while (!loaded)
    {
        //最多加载10s
        if (DateTime.Now <= start + TimeSpan.FromSeconds(10))
        {
            Application.DoEvents();
            continue;
        }

        break;
    }

    //your code here

    // 取消订阅事件处理程序
    browser.FrameLoadEnd -= frameLoadEndEventHandler;
}

 下面是一个真实完整示例：

var url = "https://url.com";
var firstLoad = true;

while (true)
{
    var loaded = false;
    Action<object, FrameLoadEndEventArgs> frameLoadEndProc = (s, args) =>
    {
        if (args.Frame.IsMain && args.Frame.Url == url)
        {
            loaded = true;
        }
    };

    var frameLoadEndEventHandler = new EventHandler<FrameLoadEndEventArgs>(frameLoadEndProc);

    // 订阅事件处理程序
    browser.FrameLoadEnd += frameLoadEndEventHandler;

    if (firstLoad)
    {
        firstLoad = false;

        //加载url并等待完成
        browser.Load(url);
    }
    else
    {
        var response = await browser.EvaluateScriptAsync("$('a:contains(\"下一页\")').size()");
        if (response.Success && response.Result?.ToString().Length > 0 && Convert.ToInt32(response.Result?.ToString()) > 0)
        {
            response = await browser.EvaluateScriptAsync("$('a:contains(\"下一页\")')[0].href");
            if (response.Result?.ToString().ToUpper() == browser.Address.ToUpper())
                break;
            else
            {
                url = response.Result?.ToString();
                browser.Load(url);
            }
                            
        }
        else
            break;
    }
                
    var start = DateTime.Now;
    while (!loaded)
    {
        //最多加载10s
        if (DateTime.Now <= start + TimeSpan.FromSeconds(10))
        {
            Application.DoEvents();
            continue;
        }

        break;
    }

    //提取页面数据

    // 取消订阅事件处理程序
    browser.FrameLoadEnd -= frameLoadEndEventHandler;
}