while I was doing my last project, I run into a topic where I need to download a CSV file from a current view in a repeating group. Besides that, I needed to have a very specific CSV upload functionality which shows the data to the user again and let them select what should be “really” uploaded.
I haven’t found any tutorials, and I wasn’t able / allowed to use plug-ins. So I just did it myself.
Here are the tutorials, I hope it helps.