Extracting a hierarchical list of pages using Fluent API

Posted by Community Admin on 13-Feb-2013 00:00

When using the Fluent API I seem to get a list of page nodes without any form of hierarchy.

So I started by trying to get a count of pages where the parent ID is null:

App.WorkWith().Pages().LocatedIn(locatedIn).Where(p => p.ParentId == Guid.Empty).Count(out count);

The count is always zero. I've tried p.ParentId == null too, but that doesn't work either.

I have a method called _PageHierarchy(parentNode, locatedIn), which I call and within itself it's supposed to loop through pages with no parent ID then call the method again for child pages.
Here's the method:

private List<MyPageNode> _PageHiearchy(MyPageNode parentNode, PageLocation locatedIn)

List<MyPageNode> myPageNodes = new List<MyPageNode>();

int count = 0;

//if we're starting the list

if (parentNode == null)

//get count

App.WorkWith().Pages().LocatedIn(locatedIn).Where(p => p.ParentId == Guid.Empty).Count(out count);

App.WorkWith().Pages().LocatedIn(locatedIn).Where(p => p.ParentId == null).ForEach(p =>

//new node

MyPageNode newPageNode = new MyPageNode(p);

myPageNodes.Add(newPageNode);

//if this node has child nodes

App.WorkWith().Pages().LocatedIn(locatedIn).ThatBelongTo(p.Id).Count(out count);

if (count > 0)

newPageNode.ChildNodes.AddRange(_PageHiearchy(newPageNode, locatedIn));

);

else

App.WorkWith().Pages().LocatedIn(locatedIn).ThatBelongTo(parentNode.InnerNode.Id).ForEach(p =>

MyPageNode newChildNode = new MyPageNode(p);

//add this node to the page nodes

myPageNodes.Add(newChildNode);

);

return myPageNodes;

I'm using a custom page node class to store the child nodes:

public class MyPageNode

private PageNode _PageNode;

private List<MyPageNode> _ChildNodes;

public MyPageNode(PageNode pageNode)

_PageNode = pageNode;

public List<MyPageNode> ChildNodes

get

if (_ChildNodes == null)

_ChildNodes = new List<MyPageNode>();

return _ChildNodes;

public PageNode InnerNode

get

return _PageNode;

public string Title

get

return InnerNode.Title;

public Guid PageId

get

return InnerNode.Id;

public Guid ParentPageId

get

return InnerNode.ParentId;

So the question is, how does one extract a hierarchical list? Or, how do I extract the list of pages in the root and then loop through each of those to extract its child pages followed by its child pages and so on?

Regards,
Jacques

Posted by Community Admin on 18-Feb-2013 00:00

Hello,

Thank you for contacting us.

Top level pages have parent page so their parent is not null. Frontend pages have parent page "Pages" and backend pages Administration->BackendPages have parent "Sitefintiy".

To retreive top level pages filter them by parent Pages and to order pages as they are ordered in the backend use the property "Ordinal".

PageManager manager = PageManager.GetManager();

//get the top level pages which are child pages of Pages prent page

var getTopLevelPages = manager.GetPageNodes().Where(p => p.Parent.Title == "Pages").OrderBy(o => o.Ordinal);

List<string> childPageTitles = new List<string>();

foreach (var childPage in getTopLevelPages)

childPageTitles.Add(childPage.Title.ToString());

Regards,

Anna Burton

the Telerik team

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Posted by Community Admin on 18-Feb-2013 00:00

Thanks Anna, I'll give this a try.

Any reason why I wouldn't be receiving these replies via email?

Posted by Community Admin on 18-Feb-2013 00:00

Is your suggested based on the Fluent API?

This thread is closed

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