How to check for First or Last items of a Gallery

[Anonymous]

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

[Meneghino · Accepted solution]

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.

[Anonymous]

Worked brilliantly. Thanks @Meneghino ! 🙂

[Anonymous]

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

[shavora]

@Anonymous hi were you able to find a solution?