vb.net - VB - Running an if statement if only a certain number of checkboxes are checked? -

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i creating pizza ordering system beginning vb class. able code 1 topping pizza when try , add more 1 topping item 2 toppings 2 other pizzas have single toppings. there way run if statement if number of checkboxes selected in group box?

private sub additems()     'declare topping variables      dim topping1 string = "pepperoni"     dim topping2 string = "bacon"     dim topping3 string = "ham"      'declare size variables      dim strpersonal string = "persoanl"     dim strsmall string = "small"     dim strmedium string = "medium"     dim strlarge string = "large"     dim strexlarge string = "extra large"      'personal single item     if radpersonal.checked = true , chkpepperoni.checked = true         checkedlistbox1.items.add(strpersonal & " " & topping1)     end if     if radpersonal.checked = true , chkbacon.checked = true         checkedlistbox1.items.add(strpersonal & " " & topping2)     end if     if radpersonal.checked = true , chkham.checked = true         checkedlistbox1.items.add(strpersonal & " " & topping3)     end if      'personal 2 items     if radpersonal.checked = true , chkpepperoni.checked = true , chkbacon.checked = true         checkedlistbox1.items.add(strpersonal & " " & topping1 & " , " & topping2)     end if     if radpersonal.checked = true , chkbacon.checked = true , chkham.checked = true         checkedlistbox1.items.add(strpersonal & " " & topping2 & " , " & topping3)     end if     if radpersonal.checked = true , chkham.checked = true , chkpepperoni.checked = true         checkedlistbox1.items.add(strpersonal & " " & topping3 & " , " & topping1)     end if end sub

http://i.stack.imgur.com/vafze.png

firstly, should not testing radpersonal.checked 6 times. should testing once , nesting rest.

secondly, should not testing, instance, chkpepperoni.checked alone first , testing again later in combination. if then, if checked in combination, going match both tests. should testing combination first , testing alone if combination doesn't match. here's how might inclined it:

if radpersonal.checked     if chkpepperoni.checked         if chkbacon.checked             'pepperoni , bacon         elseif chkham.checked             'pepperoni , ham         else             'pepperoni         end if     elseif chkbacon.checked         if chkham.checked             'bacon , ham         else             'bacon         end if     elseif chkham.checked         'ham     end if end if

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