Binding Site Map to Treeview

The TreeView control supports declarative binding to a site-map file by using SiteMapDataSource controls. When binding to an instance of the SiteMapDataSource control, the Title and Url properties of each SiteMapNode are automatically associated with the Text and NavigateUrl properties of each TreeNode object in the TreeView control, so there is no need to create custom data bindings.

Now create a TreeView and assign a SiteMapDataSource that is already on the page:

//Code Behind

TreeView tv1 = new TreeView();

tv1.DataSourceID = "SiteMapDataSource1";

//aspx

<asp:SiteMapDataSource ID="SiteMapDataSource1" runat="server" />

Binding a Site Map to Treeview Programmatically

Or you can assign the SiteMap programmatically:

// Create an instance of the XmlSiteMapProvider class.

XmlSiteMapProvider testXmlProvider = new XmlSiteMapProvider();

System.Collections.Specialized.NameValueCollection providerAttributes

    = new System.Collections.Specialized.NameValueCollection(1);

providerAttributes.Add("siteMapFile", "Web2.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();

SiteMapDataSource smd = new SiteMapDataSource();

smd.Provider = testXmlProvider;

TreeView tv2 = new TreeView();

tv2.DataSource = smd;

tv2.DataBind(); //Important or all is blank

Setting the SiteMap programmatically also allows you to switch files based on business rules.

How to add Sitemaps in web.config

This can also be done via the Web.Config:

<configuration>

<!-- other configuration sections -->

<system.web>

    <!-- other configuration sections -->

    <siteMap>

    <providers>

    <add name="SiteMap1" type="System.Web.XmlSiteMapProvider" siteMapFile="~/Web.sitemap" />

    <add name="SiteMap2" type="System.Web.XmlSiteMapProvider" siteMapFile="~/Web2.sitemap" />

    </providers>

</siteMap>

</system.web>

</configuration>

and then in your aspx page just switch provider:

<asp:SiteMapDataSource ID="SiteMapDataSource1" runat="server" SiteMapProvider="SiteMap2"  />