StringContainsOnly

StringContainsOnly checks the string given by S, to see if it is made up of only the characters given by the set of characters in aValid. This is useful to check that a string contains only what you want, or what you expect to be there.

Sets of characters can be combined by using a plus sign ( + ) as the union operator.

Declaration: Function StringContainsOnly( const S : string; const aValid : TFloChars) : Boolean;

A good example follows..

procedure BeforeMapEvent(var Value:Variant);
var
  vDigits, vCurrSym: TFloChars;
  vStr1, vStr2: string;
begin
  vDigits := ['0','1','2','3','4','5','6','7','8','9'];
  vCurrSym := ['$',',','.'];
  vStr1 := '$123.00';                        // digits and currency symbols only
  vStr2 := 'NZD123.00';                      // includes alpha characters
 
  // test first string ... it should be OK
  If StringContainsOnly(vStr1, vDigits + vCurrSym) then
    LogInfo('String "' + vStr1 + '" contains only 0-9,$,.')
  else
    LogInfo('String "' + vStr1 + '" contains other than 0-9,$,.');
 
  // test second string ... it should fail
  If StringContainsOnly(vStr2, vDigits + vCurrSym) then
    LogInfo('String "' + vStr2 + '" contains only 0-9,$,.')
  else
    LogInfo('String "' + vStr2 + '" contains other than 0-9,$,.');
 
end;