c# - How to choose when to loop through listbox? -

i have listbox of items want go through 1 one , each item should printed in messagebox. want default, when reaches end of listbox, stop. if check checkbox "loop through list [x]" want continue , start on when reaches bottom. how can that?

this code right loop through it.

int = 0; = listbox1.selectedindex; = + 1; if (i > listbox1.items.count - 1) = 0; listbox1.selectedindex = i; messagebox.show("item: " + listbox1.selecteditem.tostring()); 

this never ends though, continues loop. how can make check if it's on bottom stops? should code if checked box "loop through list [x]"...

this in timer1 interval 5000ms

edit: also, how can make print "you have reached end of list!" when comes bottom of listbox?

you said in "timer1", means code looks like:

private void timerelapsed(...) {     int = 0;     = listbox1.selectedindex;     = + 1;     if (i > listbox1.items.count - 1)     = 0;     listbox1.selectedindex = i;     messagebox.show("item: " + listbox1.selecteditem.tostring()); } 

when reach end, set = 0, allows loop continue without throwing. stop loop, need stop timer invoking function well.

the correct code be:

private void timerelapsed(...) {     int = 0;     = listbox1.selectedindex;     i++;     if (i > listbox1.items.count - 1)     {        messagebox.show("end of list reached!");        if (loopafterend)           = 0;        else           timer1.stop();     }     listbox1.selectedindex = i;     messagebox.show("item: " + listbox1.selecteditem.tostring()); } 

it written:

private void timerelapsed(...) {     int = 0;     = listbox1.selectedindex;     i++;     if (i > listbox1.items.count - 1)     {        messagebox.show("end of list reached!");        = 0;        if (!loopafterend)           timer1.stop();     }     listbox1.selectedindex = i;     messagebox.show("item: " + listbox1.selecteditem.tostring()); } 

which has advantage of letting restart loop later starting timer again!