How to change DataSource.Read URL after initial read

[Wasae]

Hi,
I have a tree view which uses dynamic loading from server when expanded. In my case there are two different URL's from where the initial and the child data is to be fetched. I tried changing the read URL from script but it is defaulted back when the user expands the tree which should not be the case.

Below is my tree
@(Html.Kendo().TreeView()
        .Name("MyTree")
        .DataTextField("Name")
        .DataSource(dataSource => dataSource
            .Read(read => read.Url("../api/User/?getAll=false").Type(HttpVerbs.Get))
        )
    )

I then change the read url in script as following 

 var tree = $("#MyTree").data("kendoTreeView");
 tree.dataSource.transport.options.read.url =  "../api/User/?getChildren=true";

But when the tree is expanded the URL is still /api/User/?getAll=false&id=1 instead of ./api/User/?getChildren=true&id=1