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HomeHomeArchived Discus...Archived Discus...Developing Under Previous Versions of .NETDeveloping Under Previous Versions of .NETASP.Net 2.0ASP.Net 2.0Hierarchical page navigation dataHierarchical page navigation data
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5/25/2007 8:06 AM
 
Tim Rolands


www.houseofnuke.com
Joined: 11/22/2003
Posts: 56

Is there any way to get a DNN site's navigation structure in a hierarchical XML form similar to the ASP.NET sitemap? Reading the doc on the navigation webcontrols, it seems like the answer should be yes, but I can't figure out how to do it.

Jon Henning, are you about? Can you shed some light on this, please, or point me in the right direction?

Any suggestions appreciated.

Tim

--
Tim Rolands
Avastone Technologies | House of Nuke
Where DotNetNuke(R) Lives
 
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5/25/2007 9:38 AM
 
Jon Henning

www.codeendeavors.com
Joined: 3/20/2003
Posts: 1767

If you look at any of the skin objects like nav.ascx.vb you will see it makes a call to its base class (NavObjectBase) called GetNavigationNodes.  This in turn calls the static method GetNavigationNodes in the DotNetNuke.UI.Navigation namespace, which is the method you are looking for.
 
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5/25/2007 4:44 PM
 
Tim Rolands


www.houseofnuke.com
Joined: 11/22/2003
Posts: 56

Thanks for the reply, Jon!

I was afraid of that: I get the following error when I use that method....

"HierarchicalDataBoundControl only accepts data sources that implement IHierarchicalDataSource or IHierarchicalEnumerable."

Can I use an XmlDataSource control and wire that up to GetNavigationNodes? I'll try that.

Tim

--
Tim Rolands
Avastone Technologies | House of Nuke
Where DotNetNuke(R) Lives
 
New Post
5/25/2007 4:59 PM
 
Tim Rolands


www.houseofnuke.com
Joined: 11/22/2003
Posts: 56

OK, I got the NodeCollection and then went through them all, creating NavDataPageHierarchyData for each one. My custom control accepts the resulting NavDataPageHierarchicalEnumerable collection.

Tim

--
Tim Rolands
Avastone Technologies | House of Nuke
Where DotNetNuke(R) Lives
 
New Post
2/29/2008 8:26 AM
 
Ali Jafarpour

Joined: 4/28/2006
Posts: 4

Hi Jon,

I also need to get the nodes and use it in my own custom menu. Following your advice I did use part of the code from nav.ascx.vb in my own web control - to keep it simple for now I want to display th nodes data in a datalist on a web control. Here is the code for the web control:

 

  DotNetNuke.Entities.Tabs

Imports

DotNetNuke.UI.WebControls

Imports

 DotNetNuke.UI.Navigation

Namespace

 

 

 

 

 DotNetNuke.UI.Skins.ControlsPartial Class azkyteMenuInherits UI.Skins.NavObjectBase' protected controls

#

 

Region " Web Form Designer Generated Code "

<System.Diagnostics.DebuggerStepThrough()>

 

Private Sub InitializeComponent()End Sub

 

 

Private Sub Page_Init(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles MyBase.Init'CODEGEN: This method call is required by the Web Form Designer

 

'Do not modify it using the code editor.

InitializeComponent()

 

End Sub

#

 

End Region

 

 

Private Sub Page_Load(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles MyBase.LoadTry

 

BuildNodes(

 

Nothing)Catch exc As Exception 'Module failed to load

ProcessModuleLoadException(

 

Me, exc)End Try

 

End Sub

 

 

objNodes = GetNavigationNodes(objNode)

 

Private Sub BuildNodes(ByVal objNode As WebControls.DNNNode)Dim objNodes As DNNNodeCollectionMe.Control.ClearNodes() 'since we always bind we need to clear the nodes for providers that maintain their state

 

'Me.Bind(objNodes)

 

 

Me.DataList1.DataSource = objNodesEnd Sub

 

End

 

The problem is that I keep getting an error of "Object reference not set to an instance of an object." for the GetNavigationNodes(objNode) method. This part of the code that I am using is the same as nav.asx.vb - any idea what shoud be done?

Thanks so much for any help inn this regard.

End Class Namespace 

Imports
 
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