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FeatureService PortalItem Query Layers #136

Closed mrickard26 closed 6 years ago

mrickard26 commented 7 years ago

If I have a PortalItem that is a FeatureService, how can I get the list of layers in that service. In most cases, I want to add a FeatureLayer to my map for each layer of the FeatureService.

.Net

mbranscomb commented 6 years ago

@mrickard26 In the future we would like to enhance the API with an object that represents the FeatureServer endpoint, allowing you to iterate the layers/tables that exposed by the FeatureServer. Additionally there are operations exposed at that level we would like to support such as being able to apply a set of edits for multiple layers/tables in the service and optionally roll back in the event of any failures.

Currently you will need to write code to access that endpoint (JSON) and iterate the layers/tables exposed and then create a FeatureLayer instance for each. For a feature service portal item, the ServiceUrl property returns the FeatureServer endpoint. Appending ?f=pjson will return the JSON e.g. https://gis.internationalmedicalcorps.org/arcgis/rest/services/Nepal/Nepal_Earthquake_2015_data/FeatureServer?f=pjson. From there you can get the collection of layers/tables and iterate those.