ASP.NET MVC 优化笔记 -SEO

1.站点地图构建：

    

   /// <summary>

   ///  实现XML格式 站点地图输出

   ///  By:rhythmk.cnblogs.com

   /// </summary>

    public class SitemapResult : ActionResult

    {

        public SitemapResult(Sitemap sitemap)

        {

            this.Sitemap = sitemap;

        }



        public Sitemap Sitemap { get; private set; }



        public override void ExecuteResult(ControllerContext context)

        {

            context.HttpContext.Response.ContentType = "text/xml";

            XmlSerializer serializer = new XmlSerializer(typeof(Sitemap));

            serializer.Serialize(context.HttpContext.Response.Output,

                                 this.Sitemap);

        }

    }



    /// <summary>

    /// 站点地图实体

    ///  By:rhythmk.cnblogs.com

    /// </summary>

    [XmlRoot(ElementName = "urlset", Namespace = "http://www.sitemaps.org/schemas/sitemap/0.9")]

    [Serializable]

    public class Sitemap : List<SitemapUrl>

    {





        [XmlInclude(typeof(SitemapUrl))]

        public void Serialize(TextWriter writer)

        {

            XmlSerializer serializer = new XmlSerializer(typeof(Sitemap));

            XmlTextWriter xmlTextWriter = new XmlTextWriter(writer);

            serializer.Serialize(xmlTextWriter,

                                 this);

        }





    }



    [XmlRoot(ElementName = "url")]

    [XmlType(TypeName = "url")]

    [Serializable]

    public class SitemapUrl

    {

        private DateTime lastModified;







        [XmlElement(ElementName = "loc")]

        public string Location { get; set; }



        [XmlElement(ElementName = "lastmod")]

        public string LastModified

        {

            get

            {

                if (DateTime.MinValue.Equals(this.lastModified))

                {

                    this.lastModified = DateTime.Now;

                }



                return this.lastModified.ToString("yyyy-MM-dd");

            }

            set { this.lastModified = DateTime.Parse(value); }

        }



        [XmlElement(ElementName = "changefreq")]

        public ChangeFrequency ChangeFrequency { get; set; }



        [XmlElement(ElementName = "priority")]

        public double Priority { get; set; }





    }





    public enum ChangeFrequency

    {

        always,

        hourly,

        daily,

        weekly,

        monthly,

        yearly,

        never

    }

 使用：

        /// <summary>

        ///   站点地图

        /// </summary>

        /// <param name="pageIndex"> 页面索引</param>

        /// <param name="subjectID"> 科目 </param>

        /// <returns></returns>



        public ActionResult Index(int subjectID = 0, int pageIndex = 1)

        {

            int total = 0;

            int pageSize=2000;

            var list = GetExamList(subjectID, pageIndex, pageSize,ref total);

            Sitemap site = new Sitemap();

            var time= DateTime.Now.ToLongDateString() ;

            

            foreach (var p in list)

            {

                site.Add(new SitemapUrl()

                {

                    ChangeFrequency = ChangeFrequency.weekly,

                    LastModified = time,

                    Location = string.Format("http://rhythmk/home/view/{0}?t={1}", p.ExaminationID , p.ExaminationTitle),

                    Priority = 0.7

                });

            }



            return new SitemapResult(site);



        }

2.判断是否为搜索引擎：

 

  /// <summary>

        /// 判断是否为搜索引擎访问

        /// </summary>

        /// <param name="useragent"></param>

        /// <returns></returns>

        public static bool IsSearchEngine(string useragent)

        {

            bool engine = false;

            if (!string.IsNullOrEmpty(useragent))

            {

                var SpiderKey = System.Configuration.ConfigurationManager.AppSettings["SpiderKey"].ToString();

                // spiderkey=@"Googlebot|Feedfetcher-Google|Baiduspider|Yahoo\s*\!\s*Slurp|YodaoBot|Sosoimagespider|Sosospider|Sogou\s*Web\s*Sprider"

                System.Text.RegularExpressions.Regex rx = new System.Text.RegularExpressions.Regex(SpiderKey, RegexOptions.IgnoreCase | RegexOptions.Compiled);

                engine = rx.IsMatch(useragent);

            }

            return engine;

        }



           public  ActionResult View()

           {

           

           bool engine = IsSearchEngine( this.HttpContext.Request.ServerVariables["Http_User_Agent"]);

            

             // 判断是否为搜索引擎 然后使用不同的试图呈现数据 

            if (engine)

            {

               

                return View("SearchView", entity);

            }

            else

            {

                return View(entity);

            }

            }

3. 检验是否成功：

   修改浏览器   Http_User_Agent   值，以达到模拟搜索引擎爬虫浏览效果。

  以火狐为例：

   3.1地址栏键入：about:config 回车

   3.2 设置：general.useragent.override–>"Baiduspider" 。可以达到模拟百度爬虫效果。

     火符默认:Mozilla/5.0 (Windows; U; Windows NT 6.0; zh-CN) AppleWebKit/525.19 (KHTML, like Gecko) Chrome/0.4.154.29 Safari/525.19

   设置完成后可以通过浏览http://www.docin.com/p-259119935.html 此网址 于其他未设置的浏览器比较 浏览页面效果。