How to retrieve field value in my Fiori apps

[gaelg_]

Hi all,

I would like create a button to change the request in my app but i have an issue 😞

In my app, i have a for container with user data and different tab for different information.

My problem it's for retrieve my Pernr value when I clic on my button, I Have the value in my header but not in my tab. I have take a second field in my tab with the same binding but he is empty 😞

my code :

var oView = this.getView(),

lv_pernr= oView.byId("ifPernr").getValue();

And after i would like call my entityset with my parameters and refresh the table in green

Have you an idea for solve my issue ?

Thank's in advance