I am doing a program , where requirment is that a excel file will be provided to me either from a desktop , or from application server .
so i need to check in the selection screen as to which option is clicked and accordingly take the file from there.
my question is however that everytime the program is executed , i need to develop logic so that i should CHECK if the file on application server is a NEW file , as compared to the last time the program was executed. If its NOT a NEW file the program should no make any changes.
how can i check that ? any ideas