1.using Panel Expander Button click want to call API and load dynamic data on Table panel but
after successfully data load not able to Expand panel.
2.FillBrList Method:
3.DetailsTemplate:
Yes, the click event handler is already defined to toggle the visible property of the named GraphObject. It appears that your override of the click event handler doesn’t do that.
By the way, the event handler follows standard conventions by having the first argument be the InputEvent and the second argument being the GraphObject on which the event handler was declared (in your case the “PanelExpanderButton” Panel). Your code seems to think that the first argument is that Panel, not the InputEvent.