Setting positions in class

Hello reader,
I have this problem that i want to bring on board for suggestions
and possible solution.

I have a database that looks like this
Attachment 92317

My objective is to load the data into a Listview control in ascending order, create another
column name Position in the Listview then generate position from the one with
the biggest marks to the least.

I want an output like this.....
Attachment 92323

hope i made myself clear
thz

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