如何按文件大小对列表视图进行排序？

I have a listview with 4 columns - Name, Extension, Size and Location. I have a method that takes the file size in bytes and converts to KB, MB, GB, etc as needed. An example output would be a 1024 byte file which is printed as "1KB". This value is then placed in the listview.I have a listview with 4 columns - Name, Extens