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Gallery Item.Selected vs Variable issue

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Posted on by Barry Francis NTT

Hi there Power App community!

I've recently implemented a change on a clients canvas app where the issue they were having is that the refresh button above a gallery, when selected, would set the gallery to another events gallery list altogether.

Setup:
Screen 1 - Event Gallery for Today

Screen 2 - Invitee gallery based on screen 1's selected event.

I fixed this by applying a variable to the event gallery Item.Selected. Then, no matter how many times you click refresh or tick an invitee, it does not refresh the gallery and set it to the first event on screen 1's gallery.

My problem comes in now, that when multiple users use the canvas app and want to see the latest updates of the invitee list, they select the refresh button and nothing changes. This is because the variable I was setting to prevent the gallery from pulling from refreshing to the first event gallery Item.Selected is remaining static and will not allow for screen 2's gallery to update (even though I'm telling it to refresh the datasource and reset screen 2's gallery).

My question is this, is there a way to reset the variable of the Item.Selected from screen 1 without having to set it to the first item in screen 1's gallery? Is there a way, without having to refresh the items in screen 2's gallery without having to change the Item that was selected from screen 2 i.e. get that reference the same.

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StalinPonnusamy Super User 2024 Season 1 on at

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Hi @barryfrancis

Set OnSelect property of Gallery to (From screen 1)

Set(ItemSelected, Screen1Gallery.Selected); Refresh('Screen2DataSource');

Make sure Screen2 Gallery uses the variable item selected.

This will make sure the 2nd screen gets the selected item from the screen and refresh screen2.

Thanks,
Stalin - Learn To Illuminate

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v-jefferni on at

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Hi @barryfrancis ,

Since you have two separate screens, in each screen includes a Gallery, I assume you will need to refresh the second Gallery with the button without leaving screen2, please consider below steps:

1. Set another variable to store the selected event's item ID:

Set(var1, Gallery1.Selected); //OnSelect of Events Gallery Set(var2, var1.ID)

2. OnSelect of the refresh button:

Set(var2, Blank()); Set(var2, var1.ID)

3. Edit Items of the Invitee Gallery, replace the var1 (Item.Selected) with below codes:

LookUp(Events, ID = var2)

So each time a user refresh the Gallery via clicking the button, Gallery2 items will firstly be cleaned up (because ID = blank) then filled by the actual items.

Hope this helps.

Best regards,

Community Support Team _ Jeffer Ni
If this post helps, then please consider Accept it as the solution to help the other members find it.

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Barry Francis NTT 10 on at

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Hi Stalin,

If I use Gallery.Selected, when I do a reset of the Gallery2 on screen2, the ItemSelected variable is lost and replaced with the first gallery item at the top of screen 1. This will set the items on gallery 2 on screen2 to a whole new event...

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Barry Francis NTT 10 on at

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Hi Jeffer Ni,

Thank for you the suggestion. I'm getting the following error on the refresh part of the solution provided:
Invalid number of arguments: received 1, expected 2
On following the suggestion, when I select the item from Gallery1 on screen1, I am setting the following variables:
Set(ItemSelected, Gallery1.Selected);
Set(ItemSelectedSecond,ItemSelected.'Campaign ID');

Then, on the second gallery, I've set the following as it will need to apply a filter via a search box sitting above gallery 2 as well:
Sort(
Filter(Invitees,
Event.'Campaign ID'=ItemSelectedSecond,
TextSearchBox1.Text in 'Invitee Name'.'Full Name'
),
'Invitee Name'.Surname
)

This is still working as required so far. Its the third step, when setting the refresh button that causing the error at the moment. Any ideas?

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Barry Francis NTT 10 on at

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Hi Jeffer Ni,

I got my syntax mixed up, I set it incorrectly:

I updated it correctly, ran a test and the second persons screen, when they clicked on the refresh button, had the updated invitee record details come through perfectly.

Thank you for the solution!

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