Trying to change output for a timer in a form in c# -

i need make form in c# have timer , have label have display of timer. label need generic label @ first saying counter, when timer starts needs display count. have display number down but, needs control can tweak count, does. can't sole counter.

here assignment:

create windows application. in main form, create label named “ltickcount”. create timer named “tperiodic”, , numerical control of own choosing. each time timer “ticks” increment integer, display integer value string in ltickcount. use numerical control change update rate of timer interactively.

i think have done correctly except bold part. finish tried make string in both label , counter. know shouldn't have in both, wanted show 2 things i've tried better feedback:

namespace windowsformsapplication3 {     public partial class form1 : form     {         public form1()         {             initializecomponent();             this.text = "aaaaaaaa aaaaaaaa ########";         }          private void checkbox1_checkedchanged(object sender, eventargs e)         {             if (checkbox1.checked)             {                 tickcounter.text = "the timer has started";                 tperiodic.enabled = true;             }             else             {                 tickcounter.text = "the timer has ended";                 tperiodic.enabled = false;             }          }          private void tickcounter_valuechanged(object sender, eventargs e)         {             tickcounter.text = tickcounter.value.tostring();         }          private void tperiodic_tick(object sender, eventargs e)         {             tickcounter.value += 1;         }          private void label1_click(object sender, eventargs e)         {             tickcounter.text = tickcounter.value.tostring();         }          private void form1_load(object sender, eventargs e)         {          }     } } 

can me figure out i'm doing wrong , point me in right way?

if going try add string (a label value) need convert integer first.

a couple ways this:

textcount.text = (convert.toint32(textcount.text) + 1).tostring(); 

is 1 way, of course still use += or other math syntax basic addition of +1.

you can use tryparse, , in fact should used verify have integer in first place:

   int count;    if (int.tryparse(textcount.text, out count))         {             count++;             textcount.text = count.tostring();         }