Handling the BusyChanged event for controls
Each control exposes a “BusyChanged” event which is raised when the controls starts loading data (for example for comboboxes, radiobuttons, checkboxes) and when loading completes.
The event provides a boolean parameter indicating if the loading starts or completes.
Example :
Code
form.GetControl(“c_CascadingRadio”).BusyChanged.AddHandler(function(busy) {
var c = form.GetControl(“c_LoadingIndicator”);
if (busy) c.SetValue(“Loading…”);
else c.SetValue(“Completed”);
});