Unable to get value of the property 'length': object is null or undefined

[Eric]

Hi,

I have a treeview and bind datasource form web api.
When I tried to drag and drop node and an error occurred, "Unable to get value of the property 'length': object is null or undefined " in IE9.


There is my code

<script>

    $(function () {

        var serviceRoot = "http://localhost:12181";

        var homogeneous = new kendo.data.HierarchicalDataSource({

            transport: {

                read: {

                    url: serviceRoot + "/api/Group",

                    dataType: "json"

                }

            },

            schema: {

                model: {

                    id: "Id",

                    hasChildren: "hasChildren"

                }

            }

        });

        $("#treeview").kendoTreeView({

            dragAndDrop: true,

            dataSource: homogeneous,

            dataTextField: "Name"

        });

    });

</script>
<div id="treeview"></div>

Any advice?

[Alex Gyoshev]

Hello Eric,

Support for drag&drop operations within a remote datasource has been introduced officially in the service pack which was released today. It is not supported in the 2012.2.710 version.

All the best,
Alex Gyoshev
the Telerik team

[Eric]

Thanks for your reply.

And where can I download the service pack ?

[Alex Gyoshev]

Hello Eric,

The service pack is available for customers with an active subscription.

All the best,
Alex Gyoshev
the Telerik team