B4J Question [SOLVED] B4XPages / B4XComboBox / Multiple Pages / How to update value in Main Page when closing another page?

[christianjeannot]

Hello Community,

I am writing a Cross-Platform-App with B4XPages where I use a B4X ComboBox in the MainPage and in SecondPage.

When the SecondPage is closed I want to show the current selected Item from B4XComboBox[SecondPage] in the B4XComboBox[MainPage].

I tried
- the B4XPage_Appear event in the MainPage
- the B4XPage_Disappear event in the SecondPage

but I was not able to show the proper selected value in the B4XComboBox in the MainPage after the SecondPage was closed.

I searched in the forum and read several threads but found no one with an answer.

Has someone please a tip or a link where it is already discussed.

Also I was not able in MainPage to access a variable from SecondPage.

B4XPages.SecondPage.VariableA

Get a unknown member.

When I try in SecondPage to access a value in MainPage this is working.

Best regards

--Christian

 

[Erel]

The main page is the only page that you can directly get from B4XPages like this.

You have several ways to access other pages:

Dim sp As SecondPage = B4XPages.GetPage("second page id")
Dim sp As SecondPage = B4XPages.MainPage.SecondPage 'SecondPage should be a global variable in B4XMainPage.

 

[klaus]

You might have a look at chapter 6 Project with 2 pages B4XPagesTwoPages in the B4X B4XPages Cross-platform projects booklet.
It does almost what you are looking for.
Two pages, each page with a B4XComboBox.
The selected value of each page is shown in the other.

 

[christianjeannot]

Thank you @Erel
I will test it.

Thank you @klaus
I will take a look into the link.

 

[christianjeannot]

@Erel and @klaus
Many thanks. It is working now