readme.md

Manage features

Create, update, and delete features to manage a feature layer.

Use case

An end-user performing a survey may want to manage features on the map in various ways during the course of their work.

How to use the sample

Pick an operation, then tap on the map to perform the operation at that location. Available feature management operations include: "Create feature", "Delete feature", "Update attribute", and "Update geometry".

How it works

1. Create a ServiceGeodatabase from a URL.
2. Get a ServiceFeatureTable from the ServiceGeodatabase.
3. Create a FeatureLayer derived from the ServiceFeatureTable instance.
4. Update the GeoViewTappedEvent subscription when a feature management operation is selected.
5. Apply the feature management operation upon tapping the map.
   • Create features: create a Feature with attributes and a location using the ServiceFeatureTable.
   • Delete features: delete the selected Feature from the FeatureTable.
   • Update attribute: update the attribute of the selected Feature.
   • Update geometry: update the geometry of the selected Feature.
6. Update the FeatureTable locally.
7. Update the ServiceGeodatabase of the ServiceFeatureTable by calling ApplyEditsAsync().
   • This pushes the changes to the server.

Relevant API

• Feature
• FeatureEditResult
• FeatureLayer
• ServiceFeatureTable
• ServiceGeodatabase

Additional information

When editing feature tables that are subject to database behavior (operations on one table affecting another table), it's now recommended to call these methods (apply or undo edits) on the ServiceGeodatabase object rather than on the ServiceFeatureTable object. Using the ServiceGeodatabase object to call these operations will prevent possible data inconsistencies and ensure transactional integrity so that all changes can be committed or rolled back.

Tags

amend, attribute, create, delete, deletion, details, edit, editing, feature, feature layer, feature table, geodatabase, information, moving, online service, service, update, updating, value