如何从各种文本字段中查找某个条件并从文本文件中显示匹配项？

I am supposed to make an inventory program from the GUI. My code can so far open the file. However, I now need to make so it only displays the files that match the criteria. The main problem is that the text file is sorted in a weird way that is necessary to decode.I am supposed to make an inventory program from