how can i take the overall time taken of the exam in asp.net .
the time count is start when the student click start test button
when i reload the page the time value should not be changing
finally when the Student click the Finish Test button i need to get the total Time Taken value and need to save the database .
i have try a lot but i did not got exact output .
so how can i do this , anyone know please help me to do that