Testing a field for valid number

[trags3]

i have 2 test input boxes and a button on a card.
field price
field ans
a button has this code

on mouseUp
if price is an integer
put "Yes" into ans
else
put "no" into ans
endif
end mouseUp

when I click the button nothing happens

[FourthWorld]

In your example code "ans" isn't accompanied by an object reference, and so is being treated like a variable.

To put a value into a field, include the "field" object specifier, e.g.:

put "SomeValue" into field "ans"

[Klaus]

Hi trags3,

you are using price and ans like variables, but tehy are in fact fields!
So you need to tell LC this fact

Code: Select all

on mouseUp
  if fld "price" is an integer then
     put "Yes" into fld "ans"
  else 
     put "no" into fld "ans"

  ## END IF are 2 words! 
  ## Wrong: endif
  end if
end mouseUp

Best

Klaus

[trags3]

Richard & Klaus
Thanks a lot. That works fine.
Tom

[Simon]

Hi Tom,
From the users side of things you should be checking while they enter characters into the field not after.
In the field script

Code: Select all

on keyDown tkey
   if tKey is not a number and tKey is not in ".$" then
         answer "Please enter numbers only"
      else
          pass keyDown
      end if
end keyDown

That will allow for decimal points and "$" but not letters. Make sure in the fields inspector you have "tab on return" selected.

Simon