Dears, I'm a beginner just getting started with Mendix. I have one thing to tell you. How can I get a list of file folders on the server like the one on the left in Windows File Explorer and display them on the tree? I searched the Marketplace, but couldn't find anything like an Add-on Widget that handles folders, including files.
You can not. That would impose a security risk. There is only one folder you have access to on the server where you can put temp files and you can retrieve the path in java with:
Do note that you have to clean this directory yourself. Mendix does not do that.