Find screen by name

Question

I want to write a method that find screen by name: however it
seems that screen doesn't have a property or method that returns
its instance name...
in the following code:
for(var i=0;i<root.numChildScreens;i++){
var cat=root.getChildScreen(i);
trace(cat.instanceName); //undefined
trace(cat.label); //undefined
trace(cat.name);//undefined
trace(cat); //valid
I know how to reference a screen by just doing
parentScreen.childInstanceName, by I want to do it dynamically,
hence the reason for the code above.
please help!
thanks!

Answer 1

Hello Abhijeet,
Here's what I think you're looking for -
tables spfli.
parameters     : p_test   like spfli-carrid.
select-options : s_carrid for  spfli-connid.
DATA:
  descr_ref TYPE ref to cl_abap_elemdescr.
START-OF-SELECTION.
  descr_ref ?= cl_abap_typedescr=>describe_by_data( p_test ).
  WRITE: / 'Typename     :', descr_ref->absolute_name.
  WRITE: / 'Kind         :', descr_ref->type_kind.
  WRITE: / 'Length       :', descr_ref->length.
  WRITE: / 'Decimals     :', descr_ref->decimals.
  WRITE: / 'Output Length:', descr_ref->output_length.
  WRITE: / 'Help ID      :', descr_ref->help_id.
Kind------> data type (C , I , etc.,)
Help ID---> data element (usually).
There are other classes in ABAP of the form CLABAPDESCR which can provide you with other information. These classes all belong to what is called RTTI (Run Time Type Identification). However, these are available only from 46c. You can explore the other classes, as I think they would be very interesting and useful in the future.
Regards,
Anand Mandalika.