怎样使用.NET/C# 解析RSS

我们经常需要写程序来采集数据，而通常采集数据的数据源是RSS，那么怎样通过.NET/C#来解析RSS文件从而达到采集的目的呢？下面将演示试验控制台程序来解析本博客的RSS实例，并给出最终的图片结果。直接上代码不多说了。

using System;
using System.Collections.Generic;
using System.IO;
using System.Linq;
using System.Net;
using System.Text;
using System.Threading.Tasks;
using System.Xml;

namespace ResolveRSSTest
{
    class Program
    {
        static void Main(string[] args)
        {
            ProcessRSSItem("http://www.zhidao91.com/feed/");
        }

        public static void ProcessRSSItem(string rssURL)
        {
            WebRequest myRequest = WebRequest.Create(rssURL);
            WebResponse myResponse = myRequest.GetResponse();

            Stream rssStream = myResponse.GetResponseStream();
            XmlDocument rssDoc = new XmlDocument();
            rssDoc.Load(rssStream);

            XmlNodeList rssItems = rssDoc.SelectNodes("rss/channel/item");

            string title = "";
            string link = "";
            string description = "";

            for (int i = 0; i < rssItems.Count; i++)
            {
                XmlNode rssDetail;

                rssDetail = rssItems.Item(i).SelectSingleNode("title");
                if (rssDetail != null)
                    title = rssDetail.InnerText;
                else
                    title = "";

                rssDetail = rssItems.Item(i).SelectSingleNode("link");
                if (rssDetail != null)
                    link = rssDetail.InnerText;
                else
                    link = "";

                rssDetail = rssItems.Item(i).SelectSingleNode("description");
                if (rssDetail != null)
                    description = rssDetail.InnerText;
                else
                    description = "";

                Console.WriteLine(link + title);
                Console.WriteLine(description);
            }
            Console.ReadKey();
        }
    }
}

达到的结果如下图所示：