I'm very sorry fir the mess in the example, the excel file is just the simplest thing I could think of which could be generated in flutter itself. But anyways I unintentionally messed it up, when I added the dropdown to choose the file type the example was fine but later on I changed it in the uodates, I'll fix the example in the git repo in 2-3 days and please go through the documentation, it's good enough