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How to check for First or Last items of a Gallery

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Posted on by Community Power Pla... Microsoft Employee

Hi all,

Currently building an app where users can request and approve company travel items.

I've built the UI of the "overview" screen as a timeline of travel events (flights, etc). Wondering whether anyone out there might know how to detect whether a given item is the First or Last one in a gallery? Would be useful in showing or hiding aspects of the UI to dictate whether the timeline ends or starts from a particular item.

Cheers

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Meneghino 6,949 on at

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Hi @Anonymous

You can use the First and Last functions. If outside the gallery then you can use the AllItems property of the gallery.
For example: If(Gallery1.Selected = First(Gallery1.AllItems), XXX, YYY)

If inside the gallery (i.e. for a control in the gallery template) then I think that you cannot use AllItems, so just use First or Last with the same expression as the Items property of your gallery.

Please provide specific needs (incl. Items property) if the above is not clear enough.

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Community Power Pla... Microsoft Employee on at

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Worked brilliantly. Thanks @Meneghino ! 🙂

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Community Power Pla... Microsoft Employee on at

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I am trying to apply this idea inside a gallery, on the visible property of an icon. I can't seem to get the syntax right, I'm getting "invalid argument type." Inside the gallery it would be ThisItem=Last(whatever)?

If(ThisItem=Last(Filter(Datasource,Field=value,Field2=Value2)),true,false)

I'm pretty sure "ThisItem" is the single record within the gallery - if I start typing
If(ThisItem.
I see the fields of the table in question in the auto fill area

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Gyllentid 894 on at

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@Anonymous hi were you able to find a solution?

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Kanika_arora 19 on at

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Hi @Meneghino
I tried your suggestion. But getting an error which says can't compare record=record type.
My requirement is to enable a control in just first row of gallery & disable for rest of the rows.
So i am using If(ThisItem=First(myCollection),DisplayMode.Edit,DisplayMode.View) on display mode property of that particular control inside gallery.
Any more suggestions will help.
Thanks.

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mychau 56 on at

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try this

If(ThisItem.ID=First(myCollection).ID,DisplayMode.Edit,DisplayMode.View)

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