Gallery initial selection action

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Posted on by toysibuy

I have a gallery and have set all the controls within it as such:

OnSelect = ClearCollect(attaches,ThisItem.Attachments);Select(Parent);ResetForm(Form1);

This works well when the user selects an item; the collection variable is populated correctly. My issue is that this only happens when the user selects the gallery item. When the app loads, by default the first item in the gallery is selected automatically. It's not running the ClearCollect() command. How to I get the initial load of the gallery to also do the ClearCollect() when PowerApps automatically selects an item? I tried setting the OnSelect of the gallery itself, but this did not resolve the issue.

(this happens not only on load but anytime I filter the gallery)

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Building Power Apps

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NielsD 24 on at

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Hi,
A workaround may be to add this in the onvisible of your home screen.

Hope this helps

Niels

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toysibuy 18 on at

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I think this would work on loading the PowerApp initially, but won't solve the issue when filters are applied to the gallery dynamically.

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v-yutliu-msft on at

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Hi @toysibuy ,

The reason why when you has not clicked one item, the form still has data is that the gallery.selected is the first item by default, no need you click one item, it will have value by default.

While the collection that is created by ClearCollect function will not have data by default automatically.

The ClearCollect function will not perform automatically until you act an action.

So if you want it has data when you has not clicked one item, you need to set this function to one action that will perform automatically.

For example: set the app's OnStart,set the screen's OnVisible, set the textinput's OnChange, set the drop down's OnChange, ect.

Could you tell me how do you filter the gallery?

If you filter the items based on constant value, for example: set the gallery's Items: Filter(....,fieldname="a").

You could set the screen's OnVisible:

ClearCollect(attaches,First(Gallery1.AllItems).Attachments)

If you filter the items based on variable, for example a textinput or a drop down.

Then ,please set the textinput's and drop down's OnChange:

ClearCollect(attaches,First(Gallery1.AllItems).Attachments)

Best regards,

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toysibuy 18 on at

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That's the workaround piece I was missing. I didn't have it on the controls that were driving the filter, I only had it in the controls of the Gallery itself. It seems so obvious now, a real forest for the trees situation.

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