using System;

using System.Linq;

using System.Threading.Tasks;

using AngleSharp;

using AngleSharp.Dom;

using AngleSharp.Html.Parser;

namespace AngleSharpSamples

{

    class Program

    {

        static async Task Main(string[] args)

        {

            var config = Configuration.Default.WithDefaultLoader();

            var address = "https://www.cnblogs.com";

            var context = BrowsingContext.New(config);

            var document = await context.OpenAsync(address);

            var cellSelector = "div.post_item";

            IHtmlCollection<IElement> cells = document.QuerySelectorAll(cellSelector);

            int i = ;

            foreach (IElement postElemItem in cells)

            {

                IElement postTitleElemItem = postElemItem.QuerySelector("a.titlelnk");

                //如果元素不存在，则 postTitleElemItem = null

                if (postTitleElemItem == null)

                {

                    continue;

                }

                i++;

                string title = postTitleElemItem.TextContent.TryTrim();

                string href = null;

                if (postTitleElemItem.HasAttribute("href"))

                {

                    href = postTitleElemItem.GetAttribute("href").TryTrim();

                }

                Console.WriteLine("{0}. {1} ( {2} )", i, title, href);

            }

            Console.WriteLine("{0}", Environment.NewLine);

        }

    }

}