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SiteMap Class

The SiteMap class is an in-memory representation of the navigation structure for a site, which is provided by one or more site map providers. This class cannot be inherited.

Namespace:  System.Web
Assembly:  System.Web (in System.Web.dll)

public ref class SiteMap abstract sealed

The SiteMap type exposes the following members.

  NameDescription
Public propertyStatic memberCurrentNodeGets a SiteMapNode control that represents the currently requested page.
Public propertyStatic memberEnabledGets a Boolean value indicating if a site map provider is specified in the Web.config file and if the site map provider is enabled.
Public propertyStatic memberProviderGets the default SiteMapProvider object for the current site map.
Public propertyStatic memberProvidersGets a read-only collection of named SiteMapProvider objects that are available to the SiteMap class.
Public propertyStatic memberRootNodeGets a SiteMapNode object that represents the top-level page of the navigation structure for the site.
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  NameDescription
Public eventStatic memberSiteMapResolveOccurs when the CurrentNode property is accessed.
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Site maps are used in conjunction with the SiteMapDataSource, SiteMapPath, and other controls to render an effective navigation interface for users to navigate a Web site. A SiteMap object is a component of the ASP.NET site navigation infrastructure that provides access to read-only site map information for page and control developers using navigation and SiteMapDataSource controls. Other components of the ASP.NET site navigation infrastructure include the SiteMapProvider and XmlSiteMapProvider classes, the Web.sitemap file, and the various controls that work with the SiteMap class, such as the SiteMapPath control, to render content and menus.

The SiteMap has several functions:

  • It provides the root node of the site navigation hierarchy (there can be only one root node).

  • It identifies which site map provider is the principal, or default, provider.

  • It keeps track of all the provider objects that are used to create the SiteMap.

Fundamentally, the SiteMap is a container for a hierarchical collection of SiteMapNode objects. However, the SiteMap does not maintain the relationships between the nodes; rather, it delegates this to the site map providers. The SiteMap acts as an interface to the site navigation information (in the form of SiteMapNode objects) that is held by these site map providers. It keeps track of the providers from which it can access site navigation data and exposes its Providers collection. A provider can store its site map information in any way—as long as it extends the SiteMapProvider abstract class, the SiteMap class can be initialized successfully from it.

The default provider for the SiteMap class is the XmlSiteMapProvider class, which works with an XML configuration file, Web.sitemap. However, you can write your own SiteMapProvider object, and use it to initialize the site map for your site. For an example of a custom site map provider, see SiteMapProvider.

A default site map configuration is specified that manages the site navigation configuration. You can override this configuration in the Web.config file, should you choose to write your own site map provider.

The SiteMap class offers only static members for performance and it can be accessed at any time in a given site from a Web Form or Web server control.

TopicLocation
How to: Programmatically Enumerate Site-Map NodesBuilding ASP .NET Web Applications
How to: Configure Multiple Site Maps and Site-Map ProvidersBuilding ASP .NET Web Applications
How to: Filter the Nodes Retrieved by SiteMapDataSource Web Server ControlsBuilding ASP .NET Web Applications
How to: Display Site-Map Data in Non-Hierarchical Web Server ControlsBuilding ASP .NET Web Applications
How to: Add Simple Site NavigationBuilding ASP .NET Web Applications
How to: Implement ASP.NET Site-Map ProvidersBuilding ASP .NET Web Applications
How to: Programmatically Enumerate Site-Map NodesBuilding ASP .NET Web Applications
How to: Configure Multiple Site Maps and Site-Map ProvidersBuilding ASP .NET Web Applications
How to: Filter the Nodes Retrieved by SiteMapDataSource Web Server ControlsBuilding ASP .NET Web Applications
How to: Display Site-Map Data in Non-Hierarchical Web Server ControlsBuilding ASP .NET Web Applications
How to: Add Simple Site NavigationBuilding ASP .NET Web Applications
How to: Implement ASP.NET Site-Map ProvidersBuilding ASP .NET Web Applications
How to: Add Simple Site NavigationBuilding ASP .NET Web Applications in Visual Studio

This section contains two code examples. The first code example demonstrates how to declare a site map provider in a Web.config file. The second code example demonstrates how to use a SiteMap object.

The following code example is a Web.config configuration section that demonstrates how an XmlSiteMapProvider object is declared as the default SiteMapProvider object.

<siteMap defaultProvider="MyXmlSiteMapProvider" enabled="true">
  <providers>
    <add name="MyXmlSiteMapProvider"
      description="The site map provider that reads in the .sitemap XML files."
      type="System.Web.XmlSiteMapProvider, System.Web, Version=2.0.3600.0, Culture=neutral, PublicKeyToken=b03f5f7f11d50a3a"
      siteMapFile="my.sitemap" />
  </providers>
</siteMap>

The following code example demonstrates how to use the SiteMap object by accessing its static members to display information about the RootNode and CurrentNode properties. Compare it to the output that is rendered by the SiteMapPath control.

No code example is currently available or this language may not be supported.

.NET Framework

Supported in: 4, 3.5, 3.0, 2.0

Windows 7, Windows Vista SP1 or later, Windows XP SP3, Windows XP SP2 x64 Edition, Windows Server 2008 (Server Core not supported), Windows Server 2008 R2 (Server Core supported with SP1 or later), Windows Server 2003 SP2

The .NET Framework does not support all versions of every platform. For a list of the supported versions, see .NET Framework System Requirements.

Any public static (Shared in Visual Basic) members of this type are thread safe. Any instance members are not guaranteed to be thread safe.

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