Problems catching an exception in c# -

Problems catching an exception in c# -

i have combobox 2 items. have button opens new form when 1 of these items selected. if none of items selected there exception(nullpointer). have tried (to no avail) grab exception , show mbox prompts user take 1 of items.

here code button click even:

if (labelgrid.text == "member" && cbtable.selecteditem.tostring().equals("workout")) { string name; string ss; foreach (datagridviewrow item in this.dtgrid1.selectedrows) { ss = dtgrid1.currentcell.value.tostring(); name = dtgrid1.selectedcells[1].value.tostring(); bookmemberworkout bmw = new bookmemberworkout(ss, name); bmw.label2.text = ss; bmw.label1.text = name; bmw.showdialog(); } }

you not supposed utilize exceptions flow command in non-exceptional cases. case user didn't select certainly not exceptional.

the right approach simple null check:

if(cbtable.selecteditem == null) { // show message box } else { // current code }

why exception handling code isn't working impossible answer, because didn't include in question.

c# exception combobox buttonclick