Q: How can I refresh the tree node symbol for the Layer Manager after changing the layer styles of the map during extension development with SuperMap iDesktop 8C?

A: 1. Firstly, you need to acquire the Layer Manager:

layersControlManager=SuperMap.Desktop.Application.ActiveApplication.MainForm.DockBarManager[typeof(LayersControlManager)].Control as LayersControlManager;

2. Then, refresh the layer:

layersControlManager.LayersTree.RefreshNod(layersControlManager.LayersTree.FindNode(layer)).