Unique node values

[Jure]

Hi!

I've implemented the drag & drop from radGrid to radTreeView using one of the online examples. At the moment I'm using a hidden field for temporarily storing the node values. The problem is nodes use the values from DB and can appear multiple times in the tree and when I drag to a lower node with value that already exist, it's dropped on the first node with that value...

I could store the node value based on the tree structure (cobination of levels and indexes) and then save the DB values to node's text but I'm wondering if there's a more elegant way, like some kind of internal node value that's unique? Like ID (node.get_ID() won't work) or something...

[Simon]

Hi Jure,

You can use the _getHierarchicalIndex() function of the client-side Node object to get its unique index in the context of its parent TreeView.

I hope this is useful in your configuration.

Kind regards,
Simon
the Telerik team

Check out Telerik Trainer, the state of the art learning tool for Telerik products.

[Jure]

Hi Simon, thanks for the fast reply!

By the time you posted I wrote my exact same javascript function, except that I use the "_" deliminator . I didn't find the suggested function in the documentation. ;) I then wrote a server side function to get the node based on the parsed returned hidden field value. It works but JavaScript would be better. If you have time...

[Simon]

Hello Jure,

It would be great if you could share the function which gets the hierarchical index of a Node with the community.

And below is the 'opposite' JS function which finds a Node by its hierarchical index:

        function findNodeByHierarchicalIndex(treeView, hierarchicalIndex) {
            var node = null;

            var indeces = hierarchicalIndex.split('_');
            var nodes = treeView.get_nodes();

            for (var index = 0; index < indeces.length; index++) {
                node = nodes.getNode(indeces[index]);

                if (node) {
                    nodes = node.get_nodes();
                }
                else {
                    break;
                }
            }

            return node;
        }

I hope it helps.

Best wishes,
Simon
the Telerik team

Check out Telerik Trainer, the state of the art learning tool for Telerik products.

[Jure]

Hi Simon, sorry for the delay...

Here's my function, I stole bits from the documentation as I remember:

                 function getNodeHierarchy(node)
                {
                    //get the node hierarchy
                    
                    var s = node.get_index();
                    var currentObject = node.get_parent();
                    
                    while (currentObject != null)
                    {
                        // get_parent() will return null when we reach the treeview
                        if (currentObject.get_parent() != null)
                        {
                            s = currentObject.get_index() + "_" + s;
                        }
                        currentObject = currentObject.get_parent();
                    }
                    
                    return s;
                }

Thanks for yours, will try to use it.