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You can extend the navigation provider in Microsoft Office SharePoint Server 2007 by deriving a custom provider class from any of the default site map providers. Deriving from an Office SharePoint Server 2007 site map provider supplies several benefits such as navigation node caching and security trimming. The following code example derives from the PortalSiteMapProvider class and demonstrates how to add items to the site map provider. Although the site map provider classes have approximately twenty abstract or virtual methods, only a small number must be overridden and implemented in a custom site map provider. Create a Microsoft Visual C# class library project with following code, add the required references, and then build the project. using System;using System.Collections.Generic;using System.Text;using Microsoft.SharePoint.Publishing;using Microsoft.SharePoint.Publishing.Navigation;using System.Web;using System.Web.UI.WebControls;using System.Configuration; namespace MyCustomNav ...

To customize navigation, you should rely on the ASP.NET Site Navigation mechanism, because it provides a standard, consistent, and easily managed solution. Customizing Web Display Controls (Menu, TreeView, and SiteMapPath) : You can customize the look and feel of standard display controls by using cascading style sheets (CSSs). You can also write your own ASP.NET 2.0 controls and use them in Office SharePoint Server 2007 navigation. To learn more, see the Menu class documentation. Note : Office SharePoint Server 2007 also provides default navigation components that you can customize, such as the Content By Query Web Part and the Table of Contents Web Part. You can configure these two controls to present a custom selection of links. To implement your own site map provider, you can derive a custom provider class from any of the default site map providers. Office SharePoint Server 2007 includes several default providers. You can also derive a custom provider class from the SiteMapProvid...