c# - How to let user enter an integer and start timer based off on that value -

i in process of creating first c# project, personal time tracking application. pretty basic far before further have timer working properly.

so far timer start / stop , reset. curious thing wanted able user set time , have counter start there.

so if wanted start @ 20 minutes , have count up,

example: 00:20:00 count 20 , add it.

however far have not figured out.

here code:

namespace timetracker {     public partial class form1 : form     {      public form1()     {       initializecomponent();       timerbox.text = string.format("00:00:00");     }      int ss = 0;     public void startbutton_click(object sender, eventargs e)     {       timer1.start();       timer1.enabled = true;       timer1.interval = 1000;     }     public void stopbutton_click(object sender, eventargs e)     {       timer1.stop();       timerbox.text = timespan.fromseconds(ss).tostring();      }     public void resetbutton_click(object sender, eventargs e)     {       ss = 0;       timerbox.text = timespan.fromseconds(ss).tostring();     }      private void timer1_tick(object sender, eventargs e)     {       ss++;       timerbox.text = timespan.fromseconds(ss).tostring();      }   } } 

here application:

http://imgur.com/vnxvrtp

any appreciated, can provide more details if like!

edit: since unclear, question is:

what process better coding this, adding integer or if there better way of implementing this?

you can set initial value of ss variable predefined integer entered user, e.g.

datetime _dt = datetime.parse(timertbox.text); int ss = _dt.second + _dt.minute * 60 + _dt.hour * 3600;