vb.net - Is there an alternative method to using 15 If statements? -

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i have 15 items in combobox , when user selects item want present different in textbox.

at moment have:

if cb_dropdown.selectedindex = 0     rtb_sql.text = "update access set accessdesc = 'less 5' accessid < '5'" else     if cb_dropdown.selectedindex = 1         rtb_sql.text = "update access set accessdesc = 'more 5' accessid > '5' , < '10' "     else         if cb_dropdown.selectedindex = 2             rtb_sql.text = ""

etc....

is there nicer , more methodical way approach looks quite scruffy?

yes, called select.

select case cb_dropdown.selectedindex     case 0 4         rtb_sql.text = "update access set accessdesc = 'less 5' accessid < '5'"     case 5         rtb_sql.text = [...]     case else         rtb_sql.text = [...] end case

although in case think looking < (less than) , > (greater than).

if cb_dropdown.selectedindex < 5     rtb_sql.text = "update access set accessdesc = 'less 5' accessid < '5'" elseif cb_dropdown.selectedindex < 10     rtb_sql.text = "update access set accessdesc = 'more 5' accessid > '5' , < '10' " end if

not sure trying though. maybe if explain in more detail can provide better answer. let me take wild guess:

dim n integer = cb_dropdown.selectedindex * 5 rtb_sql.text = "update access set accessdesc = 'more " + n + "' accessid > '" + n + "' , < '" + (n+6) + "' "

this give following result based on selectedindex:

  • 0 = 1 including 5
  • 1 = 6 including 10
  • etc...

if want shift down 1 (include 0 , not 5 in first batch) change > >= , 6 5.


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