Rotation Expression: Arcade expression issue

Question

Hello,

I'm developing mobile app and some featurelayers contains a column "SYMB_ROTATION" that represents the angle the symbol need to do.

for now I simply create a UniqueValueRenderer and apply the rotation like that:

assetRenderer.RotationExpression = $"[{rotationName}]-90";

Where rotationName is the column of the rotation value.

I also tried with the ArcadeExpression but it doesn't work

Maybe I miss something.

Does someone has a working sample of cod ?

Thanks in advance for your help.
Best regards

PreetiMaske · Answer

Hi @JBuchanan ,

I tried to reproduce and was able to. Looks like something regressed or changed over the period. It should work. I have logged a bug for us to look into this further. Thanks for bringing this to our attention.

Thanks,

Preeti

JBuchanan · Answer

Hi Preeti,
Sorry to dig up an old post, but I have some follow-up questions.

You mention the RotationExpression only accepts a fieldname or a value. Rotating by a field name works, but I can't get rotation by value to work.

I tried doing something like Layer.Renderer.RotationExpression = "45", but this seems to have no effect on the symbols. I would expect all symbols to rotate 45deg. Are values no longer supported here? I am on 200.6.

P.S. Arcade expressions are still not supported either, correct?

PreetiMaske · Answer

Hello @StephM

Currently RotationExpression only accepts a fieldname or a value. It is not equipped to accept an arcade expression. I don't know your use case but an alternate is to set rotation using an arcade expression on your data (in ArcGIS Pro) and publish that data with visual variable. Visual variable on renderers are honored in runtime and you will be able to see custom expression applied on the features.

Here are some helpful resources:

https://pro.arcgis.com/en/pro-app/2.7/help/mapping/layer-properties/vary-symbology-by-rotation.htm

https://developers.arcgis.com/documentation/mapping-apis-and-services/visualization/data-driven-styles/visual-variables/#:~:text=Visual%20variables%20are%20a%20set,from%20a%20field%20or%20expression.

Hope this helps.