I'm trying to convert an existing TreeView that works with ajax/webapi, working with signalR and can't figure out how the requests for children are passed to the hub.
The datasource loads the root level fine by calling the read method without parameters, however the read method with the parent node ID parameter never gets called for child nodes.
I have set loadOnDemand to false and I can see multiple requests being made to the hub which appear to match the root nodes with children but get the following error:
signalR: treehub.read failed to execute. Error: There was an error invoking Hub method 'treehub.read'.
Has anyone got a working TreeView/signalr example or knw how to get lower level debug info.