topic Arcade Display Expression Builder in ArcGIS Pro Questions

Arcade Display Expression Builder

JosephPilkington1 — Wed, 28 Jun 2023 21:54:40 GMT

I am trying to create a simple Display Expression in Expression Builder using Arcade. I want the expression to return the Unit, unless it is null, if null I want it to then display Building, unless that is null, if null I want it to finally display the Room. So far, my expression returns Unit, but nothing past that. What am I doing wrong?

return $feature.Unit;
if(isempty ($feature.Unit)){
return $feature.Building
}
else if(isempty ($feature.Building)){
return $feature.Room
}

Re: Arcade Display Expression Builder

jcarlson — Wed, 28 Jun 2023 22:09:20 GMT

return will end your expression. Since that first line has a return that is not within a conditional block, it will always run, and your expression will end at line 1.

Just put that line in its own if section:

if (!IsEmpty($feature.Unit)) { return $feature.Unit } else if (!IsEmpty($feature.Building)) { return $feature.Building } else if (!IsEmpty($feature.Room)) { return $feature.Room }

Re: Arcade Display Expression Builder

JosephPilkington1 — Thu, 29 Jun 2023 13:03:36 GMT

Ah! Makes sense. Thank you!! I knew something was wrong, I just couldn't figure it out. Much appreciated!