Here is what i try now to do: i want to select multiple layers e.g. by rectangle, i use this sample to select features, but how to do with multiple layers i do not know.
Just need to select multiple layers features at once, get their attributes to show them in table ( add attributes to table i have done already for my other project).
Any other solution, suggestion or advise that might be helpful will be appreciate .
Thank you very much.
Just like in the example, you are going to have to use the drawn box (polygon) and do a 'featureLayer.queryFeatures' on all of the layers that you add to your map. The hard part is going to be what you do with it afterwards, as I believe the FeatureTable that's being used can only attach to one featureLayer at a time.
You could get the results for each featurelayer, push them into one JSON string, and then use something like Dojo's 'dGrid' to display them, that would be a lot of work but you would have full control over it. You could also take each result and write out the table in HTML (<table><tr><td>fieldname</td><td>field value</td></tr></table>) and stuff it back into the page.
If you have access to the new Experience Builder, you could create a page with a map, add all of your layers, and then add the Table widget which can show the results of all of the feature layers with a nice way to select each one. That would be my recommendation, but again, you need access to Experience Builder.