It's a common scenario and easily handled using the MenuItemDataBound event. Here's an example from one of my sites:

Protected Sub MyMenu_MenuItemDataBound(ByVal sender As Object, _
                                       ByVal e As System.Web.UI.WebControls.MenuEventArgs)

    Dim text As String = e.Item.Text

    If text = "Checkout" Or text = "Shop Item" Or text = "Shopping Cart" Then
        e.Item.Parent.ChildItems.Remove(e.Item)
    End If

End Sub

Dave

bitmask wrote:

Hello aarnott, One approach I can think of is to take the nodes out of the web.sitemap file, and add them dynamically when the user arrives at the page using the SiteMap.SiteMapResolve event.

Dave Sussman wrote:

e.Item.Parent.ChildItems.Remove(e.Item)

bleroy wrote:

If it's a top-level node, you can still remove it via Menu.Items.Remove.

bleroy wrote:

If I may ask, why do you use a menu control for a hierarchy that's only one level deep? Wouldn't something like a DataList be more appropriate and less expensive?

<asp:SiteMapDataSource ID="SiteMapDataSource1" runat="server" />
<asp:DataList ID="DataList1" runat="server" DataSourceID="SiteMapDataSource1">
  <ItemTemplate>
    Description:
    <asp:Label ID="DescriptionLabel" runat="server" Text='<%# Eval("Description") %>'></asp:Label><br />
    Title:
    <asp:Label ID="TitleLabel" runat="server" Text='<%# Eval("Title") %>'></asp:Label><br />
    Url:
    <asp:Label ID="UrlLabel" runat="server" Text='<%# Eval("Url") %>'></asp:Label><br />
  </ItemTemplate>
</asp:DataList>

1. I want to put this menu (DataList) in a bulleted list, and without the table that it produces by default.  How can I get DataList1 to produce ONLY what I have inside the ItemTemplate so I can put <LI> tags around each item and nothing else? (no table tags)
2. I still need to prevent certain nodes in the siteMap from appearing in the DataList.  I've read the link earlier in this topic, and it talks about handling the ItemDataBound event, but that is for carrying custom attributes over to links, rather than removing those links altogether.  So far, every method I can find for removing a node turns up a "collection is read only" exception.  Any ideas?

What you write depend on wher eyou need to do this filtering. There are two UI controls: the SiteMapDataSource, which exposes site map data for display to bound controls (menus, treeviews, lists, etc), and the SiteMapPath, which is the breadcrumbs. If you have a need to have the site map data filtered for both then you need to work at the provider level, and there are sample providers available in the Provider toolkit (http://msdn.microsoft.com/asp.net/downloads/providers/default.aspx). If you only need the menu filtering you could just write a new menu control - I have one (along with a provider) at http://www.ipona.com/samples/MS%20Vienna%20-%20ASP.NET%202.0%20Navigation.zip.

Also make sure sure you check out Betrand and Danny's blogs: http://weblogs.asp.net/bleroy/ and http://weblogs.asp.net/dannychen/.

Dave

Hi Dave,

Thanks for all that information.  I took a look at your site and the blogs and the provider toolkit.  I don't know why, but when I look custom control code, I freeze up like a deer in the road staring at oncoming car headlights.  Unfortunately, I fear I need to get better at custom control code.  In the web app I am writing, I am binding the SiteMap to a DataList.  What I think I'm looking for, is to write a new DataList control which will expose a way to filter out specific SiteMapNodes from ItemDataBound or another event.