[Solved] How to build a hierarchal Treeview using lambda expressions

[Michael]

I have a collection of items which are hierarchally linked by parent id and would like to know how can I generate a treeview by using lambda. This is my code so far but it does not build a hierarchal tree:

@(Html.Telerik().TreeView()
                            .Name("ContentTree")
                            .BindTo(Model.ContentList, mappings =>
                            {
                                mappings.For<Content>(binding => binding
                                    .ItemDataBound((item, content) =>
                                    {
                                        item.Text = content.Name;
                                        item.ImageUrl = Url.Content("~/SiteContent/Images/Tree/folder.gif");
                                        item.Expanded = true;
                                    }));
                            })
                        )

[Alex Gyoshev]

Hello Michael,

You need to specify how the children items are bound. See the binding to model online example. Since you are using parent IDs, you might have to build the hierarchy in the controller.

Kind regards,
Alex Gyoshev
the Telerik team