增强XmlSiteMapProvider功能

上篇随笔 所述的方法可以指定SiteMapPath控件使用指定目录，指定文件名的sitemap文件。但是如果遇到Transfer的页面或者带查询的页面参数时，内置的功能可能不能满足你的要求了，这时可以编写自已的Provider来实现，如下我编写一个JobXmlSiteMapProvider类，它继承于XmlSiteMapProvider类，其中须重写BuildSiteMap()方法，还有就是通过修改传入rawUrl来增强其适应Transfer的能力。

     public   class  JobXmlSiteMapProvider : XmlSiteMapProvider
     {
        public override SiteMapNode BuildSiteMap()
        {
            return base.BuildSiteMap();
        }

        public override SiteMapNode FindSiteMapNode(string rawUrl)
        {  
            //针对Transfer页面进行优化
            rawUrl = OptimizeTransferViewJob(rawUrl);
            rawUrl = OptimizeTransferViewCompany(rawUrl);

            return base.FindSiteMapNode(rawUrl);
        }

        public override SiteMapNode FindSiteMapNodeFromKey(string key)
        {
            return base.FindSiteMapNodeFromKey(key);
        }

        /**//// <summary>
        /// 针对Transfer ViewJob.aspx页面进行优化
        /// </summary>
        private string OptimizeTransferViewJob(string rawUrl)
        {
            HttpContext context = HttpContext.Current;
            string urlToTransfer = context.Request.RawUrl;
            string match = @"jobs\/([a-fA-F0-9]{32}|([a-fA-F0-9]{8})-([a-fA-F0-9]{4})-([a-fA-F0-9]{4})-([a-fA-F0-9]{4})-([a-fA-F0-9]{12}))\/viewjob.aspx";
            //string replace = "Con001_ProjectManage/Job/viewjob.aspx?id=$1";

            //解决大小写问题
            urlToTransfer = urlToTransfer.ToLower();
            match = match.ToLower();

            string matchExpression = Globals.GetApplicationPath() + match;
            Regex regEx = new Regex(matchExpression, RegexOptions.IgnoreCase | RegexOptions.Singleline | RegexOptions.CultureInvariant | RegexOptions.Compiled);
            if (regEx.IsMatch(urlToTransfer))
            {
                //rawUrl = Regex.Replace(urlToTransfer, match, replace);
                rawUrl = Globals.GetApplicationPath() + "/Con001_ProjectManage/Job/viewjob.aspx";

            }

            return rawUrl;
        }

        /**//// <summary>
        /// 针对Transfer ViewCompany.aspx页面进行优化
        /// </summary>
        private string OptimizeTransferViewCompany(string rawUrl)
        {
            HttpContext context = HttpContext.Current;
            string urlToTransfer = context.Request.RawUrl;
            string match = @"Jobs\/([a-fA-F0-9]{32}|([a-fA-F0-9]{8})-([a-fA-F0-9]{4})-([a-fA-F0-9]{4})-([a-fA-F0-9]{4})-([a-fA-F0-9]{12}))\/viewcompany.aspx";
            //string replace = "Con001_ProjectManage/Job/viewcompany.aspx?id=$1";

            //解决大小写问题
            urlToTransfer = urlToTransfer.ToLower();
            match = match.ToLower();

            string matchExpression = Globals.GetApplicationPath() + match;
            Regex regEx = new Regex(matchExpression, RegexOptions.IgnoreCase | RegexOptions.Singleline | RegexOptions.CultureInvariant | RegexOptions.Compiled);
            if (regEx.IsMatch(urlToTransfer))
            {
                //如果请求路径符合正则表达式
                //rawUrl = Regex.Replace(urlToTransfer, match, replace);
                rawUrl = Globals.GetApplicationPath() + "Con001_ProjectManage/Job/viewcompany.aspx";
            }

            return rawUrl;
        }

另外还要修改一下Web.config文件，如：

        < add  siteMapFile ="~/App_Data/Job.sitemap"  name ="JobXmlSiteMapProvider"
            type ="CSDN.Job.Components.JobXmlSiteMapProvider, CSDN.Job.Components"   />