Virtual Scroll

[Paulo Goncalves]

There are any workaroud to implement Virtual Scroll at treeview ?

Thanks

Paulo

[Nikolay Tsenkov]

Hello Paulo,

Could you, please, be a bit more specific and explain this in a bit more detail?
Do you mean something like described in this article for RadGrid: http://www.telerik.com/help/aspnet-ajax/grid-virtual-scroll-paging.html


Regards,
Nikolay Tsenkov
the Telerik team

[Paulo Goncalves]

Hi Nikolay,

yes, this same Grid feature but at treeview with hierarchy nodes.

My application need show a treeview with 20000 nodes in the same level.

Thanks

Paulo

[Nikolay Tsenkov]

Hi Paulo,

There isn't such a feature for RadTreeView.

My suggestion is to implement it the following way:
 - in each node collection the last node, to be with Text "More..." and handling the ClientNodeClicked event to detect whether this particular node has been clicked. Then you need to call a script service with information of the requested page of nodes. The WebMethod in this service can return a RadTreeNodeData[] array which will be serialized to JSON. When the assigned callback (you should assign callback to the web service request) is called, you can iterate through the received RadTreeNodeData and create new nodes and insert them just before the "More..." - named node.

I hope this is helpful for you.


Regards,
Nikolay Tsenkov
the Telerik team