Hi Shofia,
Adding data in excel you mean Importing into Mendix ?
Hi Shofia Muthuraj,
As you said you want the data drom excel into mendix dropdown. directly its not possible . you need to create one entity and store your data in that entity and associate that entity to your main entity where you want to display the dropdown.
and if you want do any changes their then on click perdorm any action as you want.
Hope it helps!
Thanks