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Hi,

that’s a limitation of classic Dynpro. Screens are statically compiled, so you cannot really add new fields at runtime. What MB1A does is show more rows in a table control, not new fields. If you need truly dynamic behavior, you should look into SAPUI5 or Fiori where UI elements can be created or hidden based on user actions or data.

Cheers,
Sebastian

Thank you for the feedback. you mean to say MB1A has a certain number of fields already created and just makes them visible after clicking on New icon?

What do you want to do exactly?

thank you for the joining, as described, similar behavior like MB1A's new fields being generated when New icon is clicked. Thanks.

You are repeating what you have said in your question, so your question is still imprecise.

If you mean generating new fields of any type anywhere in the screen, then the answer is no because generating a Dynpro screen is not recommended, especially when it's a standard screen.

For information, MB1A is using the obsolete technology Step Loop.

Instead of Step Loop, use Table Controls or editable ALV Grid. In all cases, you may add new rows as you wish. Adding new columns is possible dynamically, especially with ALV Grid.

Hi Sandra

Actually it is MB1A that is obsolete (OSS note 2210569). Step loop is a bit dusty old technique, but I'm almost sure it is not totally obsolete.

I am still using step-loop for RF transactions running via webgui on android scanners. In this scenarios table control and ALV are not useful alternatives.

In general I agree that the functionality to dynamically add a line to a table on screen can also be made with table controls or ALV. The 3 options has each their own look and feel.

@jeff_broodwar if you want to use the same technique as MB1A, then you should search for ABAP step loop. You will find plenty of documentation online. Most of what you find will be around 20 years old, but it should still work.
I found Step-Loops in Module Pool Programming | PDF | Screenshot | Computer Science . This seems to explain it in a good way, but this site requires login.

There is also a little SAP standard documentation:
Step Loop
Creating a step loop in screen painter

Best Regards
Thomas Madsen Nielsen

Sorry Sandra, I thought my question is clear, not sure how to describe it further. Furthermore, others were able to suggest or answer it. Anyway, thank you for your interest.

Good to know.

Probably you were simply asking how to add one row. What was missing in my answer is probably a link to the documentation of Step Loop then 😄

Hi Geoff, you can try also the following way:

• create a dynpro screen with a custom control
• instantiate custom control object of class CL_GUI_CUSTOM_CONTAINER (for example in PBO)
• (optionally) create a splitter object (class CL_GUI_SPLITTER_CONTAINER) if you need several containers for your objects
• create dynamically your screen objects in the corresponding containers. In your case it could be class CL_GUI_INPUT_FIELD. You can find further suitable classes as subclasses of CL_GUI_CONTROL.

Last time I checked this approach, it had several limitations and was not really convenient for my solution, although it could be suitable for some of your use cases.