Would someone be able to offer any suggestions on how to display TreeView with certain node paths already expanded based on a "expandFolder" boolean attribute that is returned in the Remote_Data_Binding controller?

I'm using code similar to the below example with an additional "expandFolder" boolean attribute on the database.
https://demos.telerik.com/aspnet-mvc/treeview/remote-data-binding

Additionally, when a user clicks a node, the tree needs to fully expand any child nodes whose "expandFolder" is true.

I saw some posts about an "expand: true" setting topic but couldn't figure out how to use that approach with the LoadOnDemand treeview pulling from remote data binding.  I also saw some uses with expandPath.  However, I was hoping there's a way to use the existing node data without having to re-traverse the entire tree since I already set the expandFolder in the Controller?

Thanks in advance for any help,

Gil

Hi I am struggling to figure this out...I am trying to pass additional data on the call.  The id that treeview comes up with is always there and correct.  But my roleid is always null.  And the RoleId is valid number.  Running out of places to look so I figured I post...

@(Html.Kendo().TreeView()
                                .Name("permissionList")
                                .Checkboxes(true)
                                .DataTextField("name")
                                .DataSource(dataSource => dataSource
                                    .Read(read => read.Action("permissions", "roles", new { RoleId = @Model.RoleId}))
                                )
                    )

Controller

        [HttpGet]
        [Route("permissions")]
        [Route("permissions/{id}/{RoleId}")]
        public JsonResult Permissions(int? id, int? RoleId)
        {
            var roleFormMgr = new RoleFormMgr(StateMgmt);
            var roleEntity = roleFormMgr.GetRole(RoleId.GetValueOrDefault());
            var roleFormVM = roleFormMgr.PopulateView(Mapper.Map<RoleForm>(roleEntity));
            var permissions = roleFormVM.RolePermissionList.Where(p => id.HasValue ? p.parentId == id : (id == null && p.parentId == 0)).ToList();
            return Json(permissions, JsonRequestBehavior.AllowGet);
        }

I am creating a treeview, loaded from remote hierarchical data, similar to

http://demos.telerik.com/aspnet-mvc/treeview/remote-data-binding

I am trying to understand this line in the controller:

 hasChildren = e.Employees1.Any()

I assume that the employee model has a property where it checks for children.  Where can I actually look at the model?  Can I download all the demos along with the data model?

Hello, I am currently evaluating the Telerik control sets for use in a large project to start soon.  I have a requirement where we will be building a treeview in our ASP.NET MVC controller code using TreeViewItemModel list and passing to the view.  In the view razor code and/or javascript, is there a way to access the TreeViewItemModel as a user is selecting different nodes in the tree?  Specifically, when building the TreeViewItemModel, I populate the .Text and .Id properties and I need to access these values to post back to my controller code to handle the selection changes.  Is this possible? I need to quickly mock something up to demonstrate this.

Controller code to build the treeview contents is here:

public List<TreeViewItemModel> BuildTreeContents()
{
List<TreeViewItemModel> tree = new List<TreeViewItemModel>();
IQueryable<SupplierModel> suppliers = GetSuppliers();
IQueryable<ManagedOrgModel> managedOrgs = null;
IQueryable<ManagedLocationModel> locations = null;
TreeViewItemModel node = null;
List<TreeViewItemModel> orgs = null;
List<TreeViewItemModel> locs = null;
foreach (SupplierModel supplier in suppliers)
{
node = new TreeViewItemModel();
node.Text = supplier.SupplierName;
node.Id = supplier.SupplierID;
managedOrgs = GetManagedOrgs(supplier.ClientID, supplier.SupplierID);
orgs = new List<TreeViewItemModel>();
foreach (ManagedOrgModel managedOrg in managedOrgs)
{
TreeViewItemModel orgNode = new TreeViewItemModel();
orgNode.Text = managedOrg.ManagedOrgName;
orgNode.Id = managedOrg.ManagedOrgID;
locations = GetLocations(managedOrg.ClientID, managedOrg.SupplierID, managedOrg.ManagedOrgID);
locs = new List<TreeViewItemModel>();
foreach (ManagedLocationModel location in locations)
{
TreeViewItemModel locationNode = new TreeViewItemModel();
locationNode.Text = location.ManagedLocationName;
locationNode.Id = location.ManagedLocationID;
locs.Add(locationNode);
}
orgNode.Items = locs;
orgNode.HasChildren = true;
orgs.Add(orgNode);
}
node.Items = orgs;
node.HasChildren = true;
tree.Add(node);
}
return tree;

Thanks,

Doug Matulis

So lets say I have a set of entities

          ObjectModel1 - Id, Name, List<ObjectModel2> Children

          ObjectModel2 - Id, Name, Note, DateModified, ModifiedBy

So now my dataset might return

          ObjectModel1 om1a

                    ObjectModel2 om2a

                    ObjectModel2 om2b

          ObjectModel1 om1b
                    ObjectModel2 om2c
                    ObjectModel2 om2d

This would come down as a List<ObjectModel1> object with the ObjectModel1 objects in the list having the ObjectModel2 objects as children.

I would like to display this so that each of the ObjectModel1 objects are displayed as separate trees with all of the data from each ObjectModel2 object being displayed when the ObjectModel1 trees are expanded.

So, first of all, is this possible with the Kendo treeview, and if not, what would we use?  Second, even if it is possible, is there a better UI component to do the above?   

Hello,

Would someone be able to offer the solution on how to get certain node's data which is dynamic loaded (load on demand)?

The case is that in my MVC project the top level node have already be loaded on TreeView . I need load second level to fourth level node based on every level's condition (on one button click). My problem is I cannot get second level's detail data (after the nodes appended to top level ) which third level depend on. When I do the debug the count of second level nodes showed correctly, but not detail data anywhere. Do you have some suggestions? Thanks in advance!

Something is not clicking for me on this, and I am not really sure where to start.  I have what amounts to a directory structure I am sending from the server (see json below) and trying to load into the treeview.  However, I am getting an error stating .  Everything I have been able to find on that pretty much says that I need to define the schema.  This is taking too long for me to figure out and any help would be appreciated.

Hi

I have issue with Kendo treeview expanding in my MVC project. I try to expand treeview node (which have children nodes) at same time when I select it. The code went through in .js file without error.  but node didn't expand. Could any one tell me what properly be wrong? below are piece of code.  Thanks.

        var selectedNode = $("#treeView").data('kendoTreeView').dataItem(e.node); // selectedNode have correct data after this.
        var treeView = $("#treeView").data('kendoTreeView');
        treeView .expand(selectedNode); //Code went through without error