SiteMapNode.Clone Method (Boolean)

 

Creates a new copy that is a copy of the current node, optionally cloning all parent and ancestor nodes of the current node.

Namespace:   System.Web
Assembly:  System.Web (in System.Web.dll)

Public Overridable Function Clone (
	cloneParentNodes As Boolean
) As SiteMapNode

Parameters

cloneParentNodes
Type: System.Boolean

true to clone all parent and ancestor nodes of the current node; otherwise, false.

Return Value

Type: System.Web.SiteMapNode

A new node that is a copy of the current node.

If the cloneParentNodes parameter is true, the Clone method recursively clones all direct ancestor nodes and associates them with the current cloned node. Child nodes are not cloned.

The Roles and Attributes collections are applied to new collections.

The following code example demonstrates how to call the Clone method to create a duplicate site map node from the current node. The ExpandForumPaths method is registered to handle the SiteMapResolve event. It uses the Clone method to create a working copy of the current site map node, modify attributes based on personalization data, and return the working copy.

Private Sub Page_Load(ByVal sender As Object, ByVal e As EventArgs)

    ' The ExpandForumPaths method is called to handle
    ' the SiteMapResolve event.
    AddHandler SiteMap.SiteMapResolve, AddressOf Me.ExpandForumPaths

End Sub

Private Function ExpandForumPaths(ByVal sender As Object, ByVal e As SiteMapResolveEventArgs) As SiteMapNode
    ' The current node represents a Post page in a bulletin board forum.
    ' Clone the current node and all of its relevant parents. This
    ' returns a site map node that a developer can then
    ' walk, modifying each node.Url property in turn.
    ' Since the cloned nodes are separate from the underlying
    ' site navigation structure, the fixups that are made do not
    ' effect the overall site navigation structure.
    Dim currentNode As SiteMapNode = SiteMap.CurrentNode.Clone(True)
    Dim tempNode As SiteMapNode = currentNode

    ' Obtain the recent IDs.
    Dim forumGroupID As Integer = GetMostRecentForumGroupID()
    Dim forumID As Integer = GetMostRecentForumID(forumGroupID)
    Dim postID As Integer = GetMostRecentPostID(forumID)

    ' The current node, and its parents, can be modified to include
    ' dynamic querystring information relevant to the currently
    ' executing request.
    If Not (0 = postID) Then
        tempNode.Url = tempNode.Url & "?PostID=" & postID.ToString()
    End If

    tempNode = tempNode.ParentNode
    If Not (0 = forumID) And Not (tempNode Is Nothing) Then
        tempNode.Url = tempNode.Url & "?ForumID=" & forumID.ToString()
    End If

    tempNode = tempNode.ParentNode
    If Not (0 = ForumGroupID) And Not (tempNode Is Nothing) Then
        tempNode.Url = tempNode.Url & "?ForumGroupID=" & forumGroupID.ToString()
    End If

    Return currentNode

End Function

.NET Framework
Available since 2.0
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