how to calculate working hours of employee in asp.net

Jul 29 2017 3:33 AM

i have below table in and i wan to calculate employee daily working hours

i want to calculate employees in time and out time check box shows login status that when employee login and how many time he logedout
so please help me i m confuse how to calculate time. i m able to sum the in time and out time buts not giving me correct result