How can I remove nodes from a SiteMapNodeCollection?

Question

I\'ve got a Repeater that lists all the web.sitemap child pages on an ASP.NET page. Its DataSource is a SiteMapNodeCollection. But, I do

Answer 1

Using Linq and .Net 3.5:

//this will now be an enumeration, rather than a read only collection
Dim children = SiteMap.CurrentNode.ChildNodes.Where( _
    Function (x) x.Url <> "/Registration.aspx" )

RepeaterSubordinatePages.DataSource = children 

Without Linq, but using .Net 2:

Function IsShown( n as SiteMapNode ) as Boolean
    Return n.Url <> "/Registration.aspx"
End Function

...

//get a generic list
Dim children as List(Of SiteMapNode) = _
    New List(Of SiteMapNode) ( SiteMap.CurrentNode.ChildNodes )

//use the generic list's FindAll method
RepeaterSubordinatePages.DataSource = children.FindAll( IsShown )

Avoid removing items from collections as that's always slow. Unless you're going to be looping through multiple times you're better off filtering.