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copied!<p>@ScottE, I think I've managed to reproduce the code I used to solve this problem:</p> <pre><code>using System; using System.Web; using Microsoft.SharePoint; using Microsoft.SharePoint.Publishing; using Microsoft.SharePoint.Publishing.Navigation; namespace StackOverflow.SharePoint { public class Question2602537PortalSiteMapProvider : PortalSiteMapProvider { public override SiteMapNodeCollection GetChildNodes(System.Web.SiteMapNode node) { bool expandChildNodes = false; if (SPContext.Current != null) { expandChildNodes = NodeIsAncestorOfCurrentNode(node); } if (expandChildNodes) { return base.GetChildNodes(node); } else { return new SiteMapNodeCollection(); } } private bool NodeIsAncestorOfCurrentNode(System.Web.SiteMapNode node) { bool returnvalue = false; SPSecurity.RunWithElevatedPrivileges(delegate() { using (SPSite thisSite = new SPSite(SPContext.Current.Site.ID)) { using (SPWeb nodeWeb = this.OpenWeb(thisSite, node)) { using (SPWeb currentWeb = this.OpenNavWeb(thisSite)) { returnvalue = this.AncestorDescendantWebs(nodeWeb, currentWeb); } } } }); return returnvalue; } private SPWeb OpenWeb(SPSite thisSite, System.Web.SiteMapNode node) { // need to use Uri objects, as sometimes the node URL contains a query string // but calling OpenWeb(...) with a ? in your URL throws an exception // using Uri.LocalPath removes the Query String Uri siteUri = new Uri(thisSite.Url); Uri nodeUri = new Uri(siteUri, node.Url); return thisSite.OpenWeb(nodeUri.LocalPath.Split(new string[] { "/_" }, StringSplitOptions.RemoveEmptyEntries)[0], false); } private SPWeb OpenNavWeb(SPSite thisSite) { using (SPWeb currentWeb = thisSite.OpenWeb(this.CurrentWeb.ID)) { SPWeb web = currentWeb; PublishingWeb publishingWeb = PublishingWeb.GetPublishingWeb(web); // Loop all the way up the webs until we find the one which doesn't inherit // (there's gotta be a better way of doing this) while (publishingWeb.InheritCurrentNavigation && !web.ID.Equals(thisSite.RootWeb.ID)) { web = web.ParentWeb; publishingWeb = PublishingWeb.GetPublishingWeb(web); } return web; } } private bool AncestorDescendantWebs(SPWeb ancestor, SPWeb descendant) { // check the URLs to determine if descendant is a subweb or ancestor // (there's gotta be a better way...) if ((descendant.ServerRelativeUrl + "/").ToUpper().StartsWith(ancestor.ServerRelativeUrl.ToUpper() + "/")) { return true; } return false; } } } </code></pre> <p>Perhaps not the <em>best</em> solution... but <em>a</em> solution.</p>

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