bind node children to treeview

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Lachlann 344 posts 626 karma points

Nov 15, 2010 @ 18:38

0

Bind Node children to Treeview

Hi All

I am trying to write a user control that has access to the content tree. Does any one have a good way of binding the content tree to a treeview ?

I have tried writing a recursive function to walk the tree but im not getting any where any help would be great!

L

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Eduardo 106 posts 130 karma points

Nov 15, 2010 @ 20:55

0

Hi L,

How about using Linq2Umbraco?

Video tutorial:

http://vimeo.com/9788833

HTH.

Sincere regards,
Eduardo Macho

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Lachlann 344 posts 626 karma points

Nov 16, 2010 @ 17:45

0

Hey Thanks Eduardo,

Had a quick look at Linq2Umbraco, but not entirly sure how it will help I am quite new to .Net.

I have a TreeView control added to the .ascx file and I am trying to populate it using the umbraco content tree. My control requires that the user is able to choose a node form within the content tree.

any suggestions?

Thanks

L

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Eduardo 106 posts 130 karma points

Nov 16, 2010 @ 18:37
1
Hi L,

Binding the content tree to a treeview

I presume your ascx file contains a line of code like the next.
```
 <asp:TreeView ID="TreeView1" 
          SkinId="Bookstoree
          ExpandDepth="3"
          MaxDataBindDepth="3"
          runat="server" />
```
http://quickstarts.asp.net/QuickStartv20/aspnet/doc/ctrlref/navigation/treeview.aspx

1. We need to retrieve all the nodes in the Umbraco Content XML and format them.

This can be done using a special function within Umbraco Business Logic.

        umbraco.presentation.nodeFactory.Node node = new umbraco.presentation.nodeFactory.Node(-1);
        umbraco.presentation.nodeFactory.Nodes childrenNodes = node.Children;

2. Bind on the Page_Load event of the control all the data from the Umbraco Content XML to the tree control.

protected void Page_Load(object sender, EventArgs e)

{
        umbraco.presentation.nodeFactory.Node node = new umbraco.presentation.nodeFactory.Node(-1);
        umbraco.presentation.nodeFactory.Nodes childrenNodes = node.Children;

        foreach (umbraco.presentation.nodeFactory.Node n in childrenNodes)
        {
            Treeview1.Nodes.Add(new TreeNode(n.Name, n.Id.ToString()));
            Treeview1.DataBind();
        }
}

HTH.

Sincere regards,
Eduardo
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Lachlann 344 posts 626 karma points

Nov 17, 2010 @ 16:33

Thanks Eduardo,

That helped alot, in the end I managed to get my recursive function working so that the whole content tree could be stepped and then bound to a tree view.

        private void initTree()
        {
            myTree.Nodes.Clear();
            myTree.ExpandDepth = 1;
            myTree.Nodes.Add(walkTree(new Node(-1)));
            myTree.DataBind();
        }



        private TreeNode mapumbNode2treeNode(Node nodeIn){
            var tempNode = new TreeNode()
                {
                   Text = nodeIn.Name,
                    Value = nodeIn.Id.ToString()
                };

                 var thisDocType = DocumentType.GetByAlias(nodeIn.NodeTypeAlias);
                 try
                   {
                     var docTypeImage = thisDocType.IconUrl;
                   }
                catch (Exception e) { return new TreeNode(); }
            return tempNode;
        }

        private TreeNode walkTree(Node nodeIn){
            TreeNode treeNode = mapumbNode2treeNode(nodeIn);
            if (nodeIn.Children.Count > 0)
            {
                foreach (Node node in nodeIn.Children)
                {
                    treeNode.ChildNodes.Add(walkTree(node));
                }
            }
            return treeNode;
        }

thanks again for your help/

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Eduardo 106 posts 130 karma points

Nov 17, 2010 @ 16:37

0

Hi Lachlan,

Glad to hear from you. You are Welcome!.

If my answer helped you, please mark it as the solution.

Sincere regards,
Eduardo Macho

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