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How to form the Kendo UI TreeView with local Data


How to form the Kendo UI TreeView with local Data

By : Uzair Ul Hassan Shah
Date : November 19 2020, 03:59 PM
Does that help You JSON data is not formatted correctly. It has a few problems
There were no [] indicating that that elements were in an array.
code :
 var viewModel = new kendo.data.HierarchicalDataSource({
   data: [{
     "Id": "Network_01",
     "name": "Network",
     "nodes": [{
       "name": "siteName"
     }, {
       "name": "linksName"
     }, {
       "name": "demandsName"
     }]
   }],
   schema: {
     model: {
       children: "nodes"
     }
   }
 });

 $("#tree").kendoTreeView({
   dataSource: viewModel,
   dataTextField: "name"
 });
         #example {
           text-align: center;
         }
         .demo-section {
           display: inline-block;
           vertical-align: top;
           width: 220px;
           text-align: left;
           margin: 0 2em;
         }
<link href="http://cdn.kendostatic.com/2014.3.1119/styles/kendo.common.min.css" rel="stylesheet" />
<link rel="stylesheet" href="http://cdn.kendostatic.com/2014.3.1119/styles/kendo.default.min.css" />

<script src="http://cdn.kendostatic.com/2014.3.1119/js/jquery.min.js"></script>
<script src="http://cdn.kendostatic.com/2014.3.1119/js/kendo.all.min.js"></script>


<div class="demo-section k-header">
  <h4>Inline data (default settings)</h4>
  <div id="tree"></div>
</div>


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Need Help Binding A Kendo TreeView To A Local Data Source

Need Help Binding A Kendo TreeView To A Local Data Source


By : Pepe Alvarez
Date : March 29 2020, 07:55 AM
it should still fix some issue You have included kendo.data.min.js after kendo.all.min.js which should be removed because the latter includes the contents of the former.
Here is a working sample: http://jsbin.com/icojuv/1/edit
How do I generate a treeView based on remote data using Kendo UI TreeView?

How do I generate a treeView based on remote data using Kendo UI TreeView?


By : Jason Oliveira
Date : March 29 2020, 07:55 AM
wish helps you I have been reading ALL of the documentation on this and I still cannot get it to work. , I figured out all of my answers:
code :
function CreateNotificationTree(userId)
{
    debugger;
    var data = new kendo.data.HierarchicalDataSource({
        transport: {
            read: {
                url: "../api/notifications/byuserid/" + userId,
                contentType: "application/json"
            }
        },
        schema: {
            model: {
                children: "notifications"
            }
        }
    });

    $("#treeview").kendoTreeView({
        dataSource: data,
        loadOnDemand: true,
        dataUrlField: "LinksTo",
        checkboxes: {
            checkChildren: true
        },
        dataTextField: ["notificationType", "NotificationDesc"],
        select: treeviewSelect
    });

    function treeviewSelect(e)
    {
        var node = this.dataItem(e.node);
        window.open(node.NotificationLink, "_self");
    }
}

[HttpGet]
public List<Node> getNotifications(int id)
{
    var bo = new HomeBO();
    var list = bo.GetNotificationsForUser(id);
    var notificationTreeNodes = (from GBLNotifications n in list
                                 where n.NotificationCount != 0
                                 select new NotificationTreeNode(n)).ToList();
    var li = notificationTreeNodes.Select(no => new Node
    {
            notificationType = no.NotificationNode.NotificationType + " " + "(" + no.NotificationNode.NotificationCount + ")", notifications = bo.GetNotificationsForUser(id, no.NotificationNode.NotificationTypeId).Cast<GBLNotifications>().Select(item => new Notification
            {
                    ID = item.NotificationId, NotificationDesc = item.NotificationDescription, Params = new List<NotificationParam>
                    {
                            new NotificationParam
                            {
                                    ParamName = item.Param1, ParamVal = item.ParamValue1
                            },
                            new NotificationParam
                            {
                                    ParamName = item.Param2, ParamVal = item.ParamValue2
                            },
                            new NotificationParam
                            {
                                    ParamName = item.Param3, ParamVal = item.ParamValue3
                            },
                            new NotificationParam
                            {
                                    ParamName = item.Param4, ParamVal = item.ParamValue4
                            },
                            new NotificationParam
                            {
                                    ParamName = item.Param5, ParamVal = item.ParamValue5
                            },
                    },
                    ActionPageName = item.ActionPageName
            }).ToList()
    }).ToList();
    li.ForEach(i => i.notifications.ForEach(x => x.SetNotificationLink()));
    return li;
}
Which one is better suited for binding KendoUI TreeView - kendo.observableHierarchy or kendo.data.HierarchicalDataSource

Which one is better suited for binding KendoUI TreeView - kendo.observableHierarchy or kendo.data.HierarchicalDataSource


By : julietkay
Date : March 29 2020, 07:55 AM
Does that help An ObservableHierarchy is using a HierarchicalDataSource for its implementation, so switching from one to the other may not change much. Regarding performance problems, there are three concerns: the amount of DOM elements to render, the amount of requests to the server and the size of the transferred data.
If the problem is that rendering the elements is taking too long, this could be addressed by setting the loadOnDemand option to true, which would cause elements to be rendered when you expand them (if you're using local data, this defaults to false).
Binding Asp.net MVC model data to a kendo TreeView template (local data)

Binding Asp.net MVC model data to a kendo TreeView template (local data)


By : Avi
Date : March 29 2020, 07:55 AM
it fixes the issue Here is basic example of ASP.NET MVC and Kendo UI. For more information see Telerik documentation
View
code :
<script id="TreeViewTemplate" type="text/kendo-ui-template">
    <div>
        <span style="background-color: Pink">#: item.text #</span>
        <span style="background-color: yellow">#: item.id #</span>
        <span style="background-color: Green">#: item.expanded #</span>
    </div>
</script>


@(

     Html.Kendo().TreeView()
                 .Name("TreeViewTemplateBiding")
                 .TemplateId("TreeViewTemplate")
                 .BindTo((IEnumerable<NodeViewModel>)ViewBag.Tree, (NavigationBindingFactory<TreeViewItem> mappings) =>
                            {
                                mappings.For<NodeViewModel>(binding => binding.ItemDataBound((item, node) =>
                                {
                                    item.Id = node.Id.ToString();
                                    item.Text = node.Title;
                                    item.Expanded = node.Expanded;
                                })
                        .Children(node => node.Children));
                            })
)
public class HomeController : Controller
{
    public ActionResult Index()
    {
        var items = new List<NodeViewModel>();

        var root = new NodeViewModel { Id = 1, Title = "Root" };
        items.Add(root);

        root.Children.Add(new NodeViewModel { Id = 2, Title = "One" });
        root.Children.Add(new NodeViewModel { Id = 3, Title = "Two" });

        this.ViewBag.Tree = items;

        return View();
    }
}

public class NodeViewModel
{
    public NodeViewModel()
    {
        this.Expanded = true;
        this.Children = new List<NodeViewModel>();
    }

    public int Id { get; set; }
    public string Title { get; set; }
    public bool Expanded { get; set; }

    public bool HasChildren
    {
        get { return Children.Any(); }
    }

    public IList<NodeViewModel> Children { get; private set; }
}
Kendo UI treeview remove the expand arrow in kendo ui treeview if there are no child's to display - not working properly

Kendo UI treeview remove the expand arrow in kendo ui treeview if there are no child's to display - not working properly


By : Thomas Hazel
Date : March 29 2020, 07:55 AM
Any of those help It sounds like the items property is sometimes null. Give a try to check if it exists first.
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