Hide link if database is already filled by members

Hello everybody,

I’m sorry for my english if it’s not perfect.

On my website, the members have a page where some informations are displaying. (Page A)
These informations are the members informations collect with a form. (Page B)
This form link is on the Page A.

I would like to hide the link when the members have already filled the form.

Do you have advice ?

(I got this problem because of the read and write dataset option.
I could let the link, but on the page A after filled the form on page B, my repeaters displaying the datas twice. Because the dataset on Page B is set on write only.
If I set on read and write, the first time all the fields are disable.)

Thank you!