XmlSiteMapProvider.Initialize(String, NameValueCollection) Method

Definition

Namespace:

System.Web

Assembly:

System.Web.dll

Initializes the XmlSiteMapProvider object. The Initialize(String, NameValueCollection) method does not actually build a site map, it only prepares the state of the XmlSiteMapProvider to do so.

C#

public override void Initialize(string name, System.Collections.Specialized.NameValueCollection attributes);

Parameters

name

String

The XmlSiteMapProvider to initialize.

attributes

NameValueCollection

A NameValueCollection that can contain additional attributes to help initialize name. These attributes are read from the XmlSiteMapProvider configuration in the Web.config file.

Exceptions

InvalidOperationException

The XmlSiteMapProvider is initialized more than once.

HttpException

A SiteMapNode used a physical path to reference a site map file.

-or-

An error occurred while attempting to parse the virtual path supplied for the siteMapFile attribute.

Examples

The following code example demonstrates how to create a new instance of the XmlSiteMapProvider class and initialize it to build a site map from XML data.

C#

<%@ Page Language="c#" %>  
<SCRIPT runat="server">  
 private void Page_Load(object sender, System.EventArgs e) {  
     // Create an instance of the XmlSiteMapProvider class.  
     XmlSiteMapProvider testXmlProvider = new XmlSiteMapProvider();  
     NameValueCollection providerAttributes = new NameValueCollection(1);  
     providerAttributes.Add("siteMapFile","test.sitemap");  

     // Initialize the provider with a provider name and file name.  
     testXmlProvider.Initialize("testProvider", providerAttributes);  

     // Call the BuildSiteMap to load the site map information into memory.  
     testXmlProvider.BuildSiteMap();  

     // Prints "/myvirtualdirectory/WebForm1.aspx"  
     Response.Write(testXmlProvider.RootNode.Url + "<BR>");  

     // Prints "/myvirtualdirectory/WebForm2.aspx"  
     Response.Write(testXmlProvider.CurrentNode.Url + "<BR>");  
 }  
 </SCRIPT>  

The preceding code example uses an XML file that is located in the virtual root of the ASP.NET application. The file has the following format:

<siteMap>  
  <siteMapNode title="RootNode" description="The root page." url="WebForm1.aspx">  
    <siteMapNode title="CurrentNode" description="Some sub page." url="WebForm2.aspx"/>  
  </siteMapNode>  
</siteMap>  

Remarks

The XmlSiteMapProvider class overrides the inherited Initialize method to apply several attributes, such as the siteMapFile and description attributes, to the attributes collection.

Applies to

See also

• BuildSiteMap()
• Clear()