C#爬取动态网页上信息得流程步骤

private static string GetHtml(string url)
{
    ChromeOptions options = new ChromeOptions();
    // 不显示浏览器
    options.AddArgument("--headless");
    // GPU加速可能会导致Chrome出现黑屏及CPU占用率过高
    options.AddArgument("--nogpu");
    // 设置chrome启动时size大小
    options.AddArgument("--window-size=10,10");

    using (var driver = new ChromeDriver(options))
    {
        try
        {
            driver.Manage().Window.Minimize();
            driver.Navigate().GoToUrl(url);
            // 等待页面动态加载完成
            Thread.Sleep(5000);
            // 返回页面源码
            return driver.PageSource;
        }
        catch (NoSuchElementException)
        {
            Console.WriteLine("找不到该元素");
            return string.Empty;
        }
    }
}

class VideoInfo
{
    public string Title { get; set; }
    public string Href { get; set; }
    public string ImgUrl { get; set; }
}

private static List<VideoInfo> GetVideoInfos(string url)
{
    List<VideoInfo> videoInfos = new List<VideoInfo>();

    // 加载文档
    var html = GetHtml(url);
    var htmlDoc = new HtmlDocument();
    htmlDoc.LoadHtml(html);

    // 解析文档，先定位到视频列表标签
    var xpath = "/html/body/div[2]/div[4]/div/div/div[1]/div[2]/div/div";
    var htmlNodes = htmlDoc.DocumentNode.SelectNodes(xpath);

    // 循环解析它的子节点视频信息
    foreach (var node in htmlNodes)
    {
        var titleNode = node.SelectSingleNode("a[2]");
        var imgNode = node.SelectSingleNode("a[1]/div[1]/picture/source[1]");

        var title = titleNode.InnerText;
        var href = titleNode.Attributes["href"].Value.Trim('/');
        var imgUrl = imgNode.Attributes["srcset"].Value.Split('@')[0].Trim('/');

        videoInfos.Add(new VideoInfo
        {
            Title = title,
            Href = href,
            ImgUrl = imgUrl
        });
    }
    return videoInfos;
}

static void Main(string[] args)
{
    var url = @"https://space.bilibili.com/401315430";
    var videoInfos = GetVideoInfos(url);
    foreach (var videoInfo in videoInfos)
    {
        Console.WriteLine(videoInfo.Title);
        Console.WriteLine(videoInfo.Href);
        Console.WriteLine(videoInfo.ImgUrl);
        Console.WriteLine();
    }
    Console.ReadKey();
}

等一下，好妹妹
www.bilibili.com/video/BV1uyxLeJEM9
i0.hdslb.com/bfs/archive/46a15065d1b6722a04696ffaaa2235287ceaa452.jpg

一口一个?你的超甜辣椒
www.bilibili.com/video/BV1AQsDeiEn1
i0.hdslb.com/bfs/archive/d93d47d67323ee284483e963ffed34fb9884cf61.jpg