Working with multiple-selection form fields in RPGLE

[TonyDB]

In my NAB app, I have a form with a multiple-selection field that I want to read/write to via a form helper program that is written in RPGLE.

I know that if the field is a single-selection field, I can read/write to it in my RPGLE program like this:

vvIn_Char('MYFIELD');
setValue('MYFIELD');


Is there a way that I can do something similar for multiple-selection fields in RPGLE? For instance, getting the list of values from a multiple-selection field and setting a list of values to populate a multiple-selection field?

[sean.lanktree]

A multi select combo will pass down its value as usual if only one selection is made. If more than one then it will be passed down as an array of values. Here is some code to extract it.

lMyField = vvIn_char('MYFIELD');
lIsMulti = (%subst(lMyField:1:1) = OB);                 // if begins with "[" it is an array
if lIsMulti;
  lPtr   = vvJson_parse(%addr(lMyField));
  lCount = vvJsona_size(lPtr);                          // number of selections
  for lIndex=1 to lCount;
    lMyValue = %str(vvJsona_getString(lPtr:lIndex-1));  // get value of each selection
  endfor;
endif;

To set multiple values of a multi select combo just pass a string with a comma in between each value.

SetValue('MYFIELD','5,8,33');

[TonyDB]

Thank you!